Meet the Team Behind Your Care
From board-certified emergency medicine physicians and psychiatrists to licensed therapists and psychiatric nurse practitioners, every member of our team is here for one reason:
To help you feel better — safely, compassionately, and with clinical precision.
Guiding Keta’s Vision
Our founders
Dr. Haviva Malina is a licensed emergency medicine physician with more than 15 years of experience caring for patients in high-acuity settings. She graduated Phi Beta Kappa, Summa Cum Laude, from Barnard College of Columbia University, receiving departmental honors in Psychology and earned her medical degree from Albert Einstein College of Medicine. She completed her Emergency Medicine residency at the Jacobi/Montefiore program.
Dr. Malina became a proponent of ketamine therapy after seeing its rapid and meaningful impact on patients with treatment-resistant depression, anxiety, PTSD, and other mood disorders—particularly during the mental-health crisis of the COVID-19 pandemic. At Keta Medical Center, she leads with a focus on patient safety, compassionate care, and improving access to evidence-based treatments including Spravato®.
Dr. Cheryl Malina, a board-certified emergency medicine physician, is the co-founder of Keta Medical Center. With over 15 years of experience, Dr. Malina has practiced extensively in hospitals across the Bronx and Westchester. She graduated Phi Beta Kappa from Barnard College at Columbia University and earned her medical degree from Albert Einstein College of Medicine, completing her residency at the Jacobi/Montefiore Emergency Medicine Program. Dr. Malina later moved to attending physician roles at several hospitals, most recently as an attending physician at the Good Samaritan Hospital in Suffern, New York.
Dr. Malina’s interest in ketamine therapy was sparked during the COVID-19 pandemic, as she observed a surge in acute psychiatric cases. Impressed by the rapid, positive changes ketamine brought about in patients she became a strong advocate for its use in treating conditions like depression, anxiety, and PTSD.
Supporting your healing
Our psychiatrists and therapists
Dr. Ariel Heller is a board-certified adult psychiatrist with over seven years of experience providing compassionate and comprehensive mental health care. She has worked in a variety of hospital settings, giving her broad clinical insight across the spectrum of psychiatric care. Dr. Heller brings a collaborative and patient-centered approach to her work. She specializes in treating adults from young adulthood through the geriatric years, with a strong emphasis on building therapeutic relationships and working alongside her patients to help them achieve their mental health goals.
Yonit Malina earned her master's degree in social work from the Hunter School of Social Work and her bachelor's degree in psychology from Barnard College. She has over 25 years of experience providing therapy across clinical, school-based, university, and private practice settings.
Yonit currently serves as the clinical director of psychotherapy at Keta Medical Center, where she oversees the therapy team and provides ketamine-assisted psychotherapy (KAP) to patients. Her therapeutic approach is strengths-based, empowering individuals to overcome life's challenges and heal from trauma. Yonit draws on a range of therapeutic modalities, including psychodynamic therapy, internal family systems (IFS), and cognitive behavioral therapy (CBT), to tailor treatment to each patient's unique needs.
Yonit's clinical interests include mood disorders, learning disabilities, ADHD, autism spectrum disorder and other developmental disorders, post-traumatic stress disorder (PTSD), grief, and family dynamics.
Brittany Cook, LCSW, earned her master's degree in clinical social work from Fordham University and her bachelor's degree from the University of Central Florida. She is a New York-licensed clinical social worker and certified ketamine-assisted psychotherapist (KAP) with over a decade of experience treating trauma, depression, anxiety, substance use, eating disorders, personality disorders, and other complex mental health conditions. Her client-centered, trauma-informed approach integrates evidence-based therapies including internal family systems (IFS), cognitive behavioral therapy (CBT), dialectical behavior therapy (DBT), mindfulness, and motivational interviewing. Brittany guides clients through every stage of the ketamine therapy process-from preparation and intention setting to integration-helping clients turn insights gained during treatment into meaningful, lasting change.
Charlea Muñoz earned her MSW from Fordham University, has an MA in psycholinguistics from the University of North Texas, and a BA in English from The University of Texas at Austin. She is an experienced psychotherapist with a strong foundation in trauma-informed care and eye movement desensitization and reprocessing (EMDR). She has provided psychotherapy and crisis intervention support to clients across nonprofit, private practice, and integrated care settings.
Crystal Persky is a dual board-certified Psychiatric Mental Health and Acute Care Nurse Practitioner with over a decade of clinical experience providing compassionate, evidence-based care across both medical and psychiatric settings. This background gives her a broad clinical perspective, allowing her to consider both physical and mental health factors in treatment planning.
Crystal places a strong emphasis on building a meaningful therapeutic alliance, ensuring that patients feel heard, understood, and actively involved in their care. She prioritizes spending time with patients and providing clear education so they can fully understand their treatment options and participate in informed decision-making.
She is committed to evidence-based, patient-centered care and stays engaged with emerging treatments to offer the best possible outcomes. Crystal has a particular interest in treatment-resistant mood disorders and brings experience in the use of ketamine-based therapies as part of a comprehensive treatment approach. She works collaboratively with patients to develop individualized treatment plans that address their unique needs and goals.
Emily Zelner earned her master's degree in clinical social work from Rutgers University and her bachelor's degree from Brown University. She is a licensed clinical social worker and certified eye movement desensitization and reprocessing (EMDR) clinician with training in internal family systems (IFS) and psychedelic-assisted psychotherapy. Emily has served as a study therapist on multiple psychedelic clinical trials and has worked in both private practice and community mental health. She works with adults navigating depression, anxiety, life transitions, and complex trauma, believing that healing happens through safe, trusting therapeutic relationships.
Estefania Molina Bracamonte earned her master's degree in clinical social work from Columbia University and her bachelor's degree in psychology from Long Island University. She provides ketamine-assisted psychotherapy (KAP) and integrates evidence-based approaches including cognitive behavioral therapy (CBT) and eye movement desensitization and reprocessing eye movement desensitization and reprocessing (EMDR). Estefania works with individuals experiencing depression, anxiety, PTSD, and trauma, with a strong commitment to culturally responsive care and supporting diverse communities. A native Venezuelan, she is fluent in both Spanish and English.
Hillary Eastman earned her master's degree in clinical social work from New York University and bachelor's degrees in psychology and sociology from SUNY New Paltz. She is a highly experienced licensed clinical psychotherapist with expertise in outpatient, inpatient, and residential treatment settings across New York and Texas. Hillary specializes in evidence-based approaches such as cognitive behavioral therapy (CBT), dialectical behavior therapy (DBT), and trauma-informed care, helping individuals, couples, and families navigate anxiety, depression, PTSD, and other life challenges.
Luis A. Febus, PMHNP-BC is a board-certified psychiatric nurse practitioner specializing in the evaluation and treatment of treatment-resistant depression in adults. He provides comprehensive psychiatric assessments and medication management, with an emphasis on evidence-based strategies for individuals who have not responded to standard antidepressant treatments. Care is collaborative, clinically rigorous, and focused on improving function and quality of life.
Stacey Blume Frankel has a Master's Degree in social work from UCLA and a bachelor's degree in psychology from the University of Michigan. She has extensive experience working with a wide range of mental health challenges including depression, anxiety, PTSD, addiction, general life transitions, spiritual emergencies and exploring the subconscious mind through dream analysis.
Tyler Parrott is a Licensed Clinical Social Worker and experienced psychotherapist who earned his MSW from Hunter College. He works with adults navigating depression, anxiety, trauma, relationship difficulties, and longstanding patterns that can leave them feeling stuck. Drawing from psychodynamic, psychoanalytic, and other evidence-based approaches, Tyler helps patients prepare for and integrate ketamine experiences, translating emerging insights into meaningful changes in how they understand themselves, relate to others, and approach their lives.
Salina Xu is a medical office assistant at Keta Medical Center with experience in primary care, cardiology, gastroenterology, ophthalmology, and optometry. She previously worked as a medical scribe and office coordinator, bringing a strong background in patient care and office management. Salina holds a Bachelor of Science in psychology and is passionate about destigmatizing mental health and making healthcare more accessible.
Outside of work, Salina enjoys flower arranging, pottery, photography, and spending time with her dog, Stormi, whom she loves dressing up.
Yessica is a Patient Administrative Coordinator at Keta Medical Center with over six years of experience in medical interpretation, patient support, and client relations. Her background in healthcare has allowed her to work closely with patients and providers in a variety of clinical settings, with a focus on clear communication, insurance support, and compassionate patient care. As a bilingual professional, she is passionate about helping patients feel comfortable, heard, and understood throughout their healthcare experience. Outside of work, Yessica enjoys spending time with her family, caring for her dog, and exploring creative projects and interests.
Ensuring safe, expert-led care
Our in-office physicians
Dr. Robin Kim is a board-certified Emergency Physician with dual training in Emergency Medicine and Internal Medicine. He completed his Emergency Medicine Residency at Lincoln Medical and Mental Health Center and his Internal Medicine Residency at NewYork-Presbyterian Queens Hospital. Dr. Kim previously served as the Director of the Emergency Department at Good Samaritan Hospital and has over 30 years of experience caring for patients in the emergency department. He is also Clinical Director for New York Medical College at Good Samaritan Hospital and Director of Spring Hill EMS.
Throughout his career, Dr. Kim has witnessed the growing impact of depression and mental health crises on individuals and families. Inspired by this need, he is now dedicated to helping patients who struggle with depression, with the goal of bringing hope, healing, and improved quality of life through compassionate, evidence-based care.
Dr. Marra is a board-certified emergency medicine physician with over two decades of experience in acute care. After earning a Doctor of Osteopathic Medicine degree from Rowan University School of Osteopathic Medicine in 2000, Dr. Marra completed an emergency medicine residency at Albert Einstein Medical Center in Philadelphia in 2004. Since becoming board certified in 2005, he has dedicated his career to providing compassionate, evidence-based emergency care while pursuing a special interest in substance abuse and addiction treatment. His work bridges the gap between emergency medicine and long-term recovery, helping patients access critical resources and support during times of crisis. Dr. Marra joined the team at Keta Medical Center in July 2024.
Dr. Apiradee Sanglimsuwan is a board-certified emergency medicine physician with a passion for innovation and excellence. Since 2019, Dr. Sanglimsuwan has been an integral part of Montefiore Medical Center and an assistant professor at Albert Einstein College of Medicine.
With a background in chemical engineering from MIT, she combines her technical expertise with a patient-centered approach to enhance care and lead impactful quality improvement projects. Dr. Sanglimsuwan is also deeply dedicated to mentorship, actively supporting resident education and fostering growth in future medical professionals.
Dr. Silva is a board-certified emergency medicine physician with over 10 years of clinical experience at BronxCare Health System. A proud product of New York University School of Medicine, he completed both medical school and residency training at the institution. Dr. Silva has developed a deep interest in the evolving therapeutic landscape of ketamine - particularly its expanding role in the treatment of depression, PTSD and substance use disorders. He is passionate about bringing a rigorous, patient-centered, and safety-first approach to ketamine-assisted therapy as a transformative option for patients who have not found relief through traditional therapies.
Dr. Andre Anderson is an emergency medicine attending physician trained at NewYork-Presbyterian Columbia/Cornell. He has worked at NYC Health + Hospitals/Lincoln Medical Center and Columbia University Emergency Department. Having witnessed a surge in psychiatric presentations in city emergency departments, he was drawn to the growing evidence supporting ketamine's efficacy in treating PTSD and depression, leading him to join Keta MC to offer patients this evidence-based path to relief.
Driving care excellence
Our nursing staff
Hillary Oriol is a registered nurse providing care for individuals with treatment-resistant depression. Her role focuses on patient safety, therapeutic monitoring, and compassionate support throughout the ketamine treatment process. Hillary is committed to helping patients regain hope and improve their quality of life through innovative mental health care.
Bindi Patel is a registered nurse whose background in acute care informs her empathetic and detailed approach to ketamine therapy. She is dedicated to creating a calm, supportive environment where patients feel informed and empowered throughout their healing process.
Dina K., RN, CEN is a board-certified Emergency Room nurse with over 21 years of clinical experience. With a calm, compassionate approach, she brings extensive expertise in acute care and patient advocacy to support individuals throughout their ketamine treatment journey. Her focus is on safety, comfort, and helping patients feel truly cared for every step of the way.
NYC-based Registered Nurse with 16 years of experience across acute care settings, including 8 years in Emergency Medicine.
Strong background in high-acuity care, patient stabilization, and mental health-aware clinical
Jewell is a registered nurse with a background in emergency medicine and a strong interest in mental health care. She enjoys working at Keta, building meaningful connections with patients, supporting them throughout treatment, and celebrating their progress. Outside of work, she enjoys crafting, reading, playing board games, and exploring new restaurants or Broadway shows with her husband.
Melina comes from an emergency nursing background, where she built strong clinical skills and a deep commitment to patient care. Melina now loves being part of the team at Keta Medical and supporting patients throughout their care journey.
With nearly two decades of experience in nursing, Michael brings a depth of clinical knowledge and true compassion to every patient interaction. His background spans high-acuity settings including the Intensive Care Unit (ICU), Emergency Department (ER), and the Cardiac Catheterization Lab, where he has cared for patients and their families during some of their most critical moments. This diverse experience has strengthened his clinical judgment, technical expertise, and ability to remain calm and focused in fast-paced, high-pressure environments.
Michael is deeply committed to delivering safe, empathetic, and patient-centered care. Known for his attention to detail and advocacy for best practices, Michael prioritizes both patient safety and dignity while collaborating closely with interdisciplinary teams. His passion for nursing is rooted not only in clinical excellence, but also in building trust with patients and families, ensuring they feel informed, supported, and respected throughout their care journey. Michael is excited to bring his experience and passion to the Keta Medical Team and to care for the patients that have put their trust in Keta Medical.
Viktoriya holds a Bachelor of Science in Nursing from Hunter College of The City University of New York. With over 20 years of experience at New York Mount Sinai Hospital, she delivers high-quality care to patients and their families in challenging circumstances. Viktoriya is dedicated to providing compassionate and mindful care, supporting her patients through their mental health journeys and continually learning new ways to enhance their well-being.
Guiding you along the way
Patient liaisons
Paul Rosales is the Manager of patient experience & engagement at Keta Medical Center. He has over a decade of healthcare experience, including work with global mental-health organizations like the Child Mind Institute. He oversees the patient journey across all clinics and specializes in bridging clinical operations, mental-health programs, psychopharmacology, and patient education to design care experiences that are both equitable and impactful for diverse patient populations.
Paul holds a degree from Montclair State University and focuses on public health, social work, and research related to mental-health access, and patient experience. He is driven by a commitment to health equity and building systems that work better for patients.
Furtuna Aliu is a patient experience liaison at Keta Medical Center, dedicated to ensuring every patient feels supported, informed, and cared for throughout their mental health journey. With a background in the arts and hands-on experience as both a clinical and medical assistant, Furtuna brings a unique blend of empathy, creativity, and professionalism to her role. She is passionate about streamlining the patient experience, helping individuals access the full range of Keta Medical Center’s resources, and fostering an environment where every voice is heard. At Keta Medical Center, her goal is to make each visit feel relaxing, supportive, and deeply personal.
Maddy Smith is a patient experience liaison at Keta Medical Center. With a Bachelor of Arts in Psychology from Vassar College and experience with patients in healthcare settings, Maddy brings a unique mix of warmth, professionalism, and a deep understanding of the ketamine treatment. Having previously worked directly in the mental health field, Maddy understands the importance of uplifting patient voices, ensuring that every patient feels heard and supported. Her goal is to create a space filled with peace and healing, where centering patient experiences is at the forefront of her interactions. She is excited to bring her love for psychology, mental health, and genuine care for patients, to Keta Medical Center.
Always here to welcome you
Office administrative staff
Jennifer Barrios is a healthcare operations leader passionate about scaling early-stage healthcare startups that drive innovation and deliver meaningful solutions in the healthcare industry. With over a decade of experience in multi-site management, process optimization, and team development, Jennifer has led growth and expansion for organizations across medical, sports & wellness, regenerative health and mental health sectors.
Currently, Jennifer serves as Senior Practice Manager at Keta Medical Center, overseeing multi-location operations and care coordination for advanced mental health treatments. Her core expertise spans business growth, process optimization, digital health solutions, and multi-site operations, with hands-on experience managing and empowering geographically diverse teams to deliver exceptional results.
Outside of work, Jennifer is an avid tennis player and loves taking art history classes at the amazing museums of New York City.
Dedicated office admin, with experience and background in healthcare. Skilled in managing patient scheduling, and other administrative tasks to support a positive experience for both patients and care team.
Alexis is a caring and organized medical office administrator who enjoys creating a positive experience for patients and supporting a smooth, efficient workflow. She values kindness, teamwork, and attention to detail in everything she does.
Amanda's professional career has consistently involved administrative and supervisory leadership primarily within a rehabilitation hospital setting. She holds a Master's degree in Healthcare Administration from Walden University and a BA in Health Science from Sacred Heart University. Her professional responsibilities have consistently involved managing staff, assisting with overseeing daily operations, ensuring compliance with healthcare regulations, and contributing to various hospital departments.
Charleen is a medical office assistant with several years of experience in hospital and medical settings. She is passionate about patient care and loves helping people, coordinating care, and building meaningful connections with patients while providing compassionate, efficient administrative support. Always eager to learn and grow, Charleen strives to combine professionalism, empathy, and strong organizational skills to make a positive impact in every setting.
India is a medical office assistant who brings empathy, organization, and a genuine passion for helping others to every patient interaction. She recently earned her bachelor’s degree in psychology from the University of Colorado Boulder, where she developed a deep understanding of human behavior and mental health. India values creating a welcoming and supportive environment where patients feel comfortable and cared for. Known for her calm and compassionate nature, she strives to make each visit a positive experience and looks forward to growing her career in healthcare while continuing to support others’ well-being.
Melinda is a medical office assistant who brings several years' experience in healthcare, commercial insurance, and office administration to the team at Keta Medical Center. With a BS in Neurobiology from Georgetown University and a background in numerous doctors' offices, she is excited to combine her knowledge of the human brain and her love of working with the public to help patients on their journey with Keta. Melinda is always happy to go the extra mile for them, answering any questions they have and making sure they feel as comfortable and well-informed as possible. Outside of work, she enjoys drawing, photography, and reading sci-fi/fantasy novels.
Nikki is a Patient Administrative Coordinator with experience supporting patients and healthcare operations. She is currently pursuing a Bachelor of Science in Healthcare Administration, where she is continuing to build her knowledge of healthcare systems and patient-centered care. Nikki brings strong communication, organization, and problem-solving skills to her role and is passionate about creating a welcoming and supportive environment for every patient. Known for her empathy, attention to detail, and calm approach, she is dedicated to helping patients feel comfortable and cared for while helping make each patient’s experience as positive and stress-free as possible.
Nejra is a medical office assistant with several years of experience in healthcare administration, patient services, and front office operations. Throughout her career, she has developed expertise in patient scheduling, insurance verification, care coordination, and creating a welcoming, efficient experience for every patient. With a Bachelor of Science in Psychology, she combines her understanding of human behavior with strong organizational skills and a compassionate, patient-centered approach. Nejra is passionate about ensuring patients feel informed, supported, and comfortable throughout their journey with Keta Medical Center. She is committed to going the extra mile to help each patient feel valued and cared for from their first interaction to their last.
My name is Sara, and I am the Medical Office Assistant at our New Rochelle location. I help the patients feel welcome with a friendly face and a warm greeting so their treatments are off to a good start. I assist with any of their scheduling needs and questions, while managing the day to day flow of the office. I love how Keta provides not just treatments, but a whole experience for each patient, including comfy chairs, immersive music, bright, floral scents, and cozy blankets.
Theresa brings over six years of experience providing compassionate and efficient patient support. As a Medical Assistant with a Bachelor’s degree in Biology from Brooklyn College, she has built a strong foundation in both clinical and administrative operations, emphasizing empathy, communication, and precision in every interaction. Now advancing her career in nursing, Theresa is dedicated to lifelong learning and professional growth. Her genuine passion for helping others drives her to deliver exceptional, patient-centered care while fostering trust, collaboration, and meaningful connections that positively impact each patient’s health and overall experience in the healthcare setting.
Yexenia earned her Bachelor of Science in Supply Chain Management from Rutgers University, where she developed strong organizational, communication, and problem solving skills. With experience supporting healthcare and wellness practices, she is passionate about creating a welcoming environment for patients while ensuring efficient day to day operations. Known for her professionalism, attention to detail, and compassionate approach, Yexenia is dedicated to providing exceptional patient care.
Isabel is part of our administrative team at KETA, where she supports patients with scheduling, phone communication, and general office assistance. She enjoys helping create a friendly and welcoming environment where every patient feels comfortable and cared for. Isabel values being part of a team dedicated to making each visit a positive experience.
Lexx brings over 15 years of experience in healthcare, with a background that spans clinical, managerial, and administrative roles across a wide range of diverse healthcare settings. At Keta, she truly enjoys interacting with patients, building rapport, and helping create a supportive and welcoming environment. Lexx is committed to compassionate, patient-centered care and take pride in contributing to a space where individuals feel heard, respected, and supported. In her free time, she enjoys reading and spending quality time with friends and family.
Introducing you to the Keta treatment process
Intake team
Liz Nardelli brings over 20 years of marketing, sales, and business development experience to Keta Medical Center, where she serves as Director of Patient Intake. In this role, Liz leads Keta’s intake team and oversees the patient journey from the initial inquiry through the scheduling and onboarding process. She has played an integral role in developing Keta’s intake operations, building a strong patient-centered team, and creating processes designed to make accessing innovative mental health treatments as seamless and supportive as possible.
A Massachusetts native and Merrimack College graduate, Liz began her career with Simon Property Group before serving as Center Director at Sylvan Learning Centers, where her leadership and client-focused approach earned multiple awards. She later directed marketing and business development at Guaranteed Rate, bringing her extensive experience in relationship building, sales, and patient-focused communication to Keta Medical Center.
Drawn to Keta’s innovative treatments and compassionate approach to mental health care, Liz is passionate about helping patients feel informed, supported, and comfortable from their very first conversation with Keta.
Liz lives in Massachusetts with her husband and two children and enjoys event planning, traveling, cooking, and volunteering in her community.
Based in Vermont, Hannah is a dedicated professional who values balance, family, and creativity. When she’s not at work, she enjoys cooking and spending quality time with her three daughters. Passionate about growth and connection, Hannah brings warmth, authenticity, and purpose to everything she does.
Jessica makes sure every Keta Medical Center patient meets their insurance requirements with accuracy and care. She manages the prior authorization process from start to finish,—keeping documents, details, and deadlines on track so treatment can move forward smoothly. With a background in marketing and design, Jessica also lends her creative eye to Keta Medical Center’s visual content and helps keep the team organized behind the scenes. Known for her reliability, attention to detail, and calm approach under pressure, she plays a key role in keeping Keta Medical Center’s administrative systems efficient and patient care uninterrupted.
Ashley brings strong communication skills and a passion for helping others to her role at Keta Medical Center. She guides new patients through the intake process with warmth and professionalism, ensuring every individual feels welcomed, supported, and informed from the very beginning.
As a bilingual team member fluent in English and Spanish, Ashley is dedicated to making the intake experience smooth and accessible for all patients.
Outside of work, she enjoys exploring new restaurants with her family, trying out fun activities around New York City, and getting away to relax at nearby beaches.
Erin Miller is an intake specialist at Keta Medical Center with extensive experience in customer service and medical patient intake. She takes pride in helping patients feel informed and supported, and is always happy to answer questions about our centers and treatment options. Outside of work, Erin enjoys spending time outdoors, being with family, and relaxing with a hot cup of tea.
A graduate of Eastern Connecticut State University, Jamie Tower brings extensive customer service experience to the healthcare field. Passionate about patient care and clear communication, she is dedicated to ensuring every individual who connects with Keta Medical Center has a positive and supportive experience.
Laura Silvestro recently joined Keta Medical Center and brings extensive experience in both customer and sales functions, having worked across various large and small businesses. Her comprehensive skills, particularly in customer service, make her a valuable addition to the intake team. In her free time, Laura enjoys spending time in New Hampshire and on Cape Cod with family and friends.
Lisette is a compassionate and dependable professional who brings focus and care to her role at KETA Medical Center. She skillfully manages patient caseloads while ensuring the lead triage process runs smoothly and accurately. With a supportive, collaborative approach, Lisette helps guide patients with clarity and kindness. Her flexibility and strong commitment to continuity of care contribute to a positive and reassuring intake experience for everyone she supports.
Outside of work, Lisette always has a soundtrack playing—whether she’s staying productive or spending quality time with friends and family.
As a patient intake specialist at Keta Medical Center, Sarah Thorpe truly enjoys connecting with patients and being part of their mental health journey. Helping others take the important first step toward healing is incredibly rewarding for her. Sarah lives in New Hampshire and loves embracing each changing season— whether it’s hiking in the fall, skiing in the winter, or spending sunny days outdoors in the summer.
Senior management and general administrative staff
Dr. Haviva Malina is a licensed emergency medicine physician with more than 15 years of experience caring for patients in high-acuity settings. She graduated Phi Beta Kappa, Summa Cum Laude, from Barnard College of Columbia University, receiving departmental honors in Psychology and earned her medical degree from Albert Einstein College of Medicine. She completed her Emergency Medicine residency at the Jacobi/Montefiore program.
Dr. Malina became a proponent of ketamine therapy after seeing its rapid and meaningful impact on patients with treatment-resistant depression, anxiety, PTSD, and other mood disorders—particularly during the mental-health crisis of the COVID-19 pandemic. At Keta Medical Center, she leads with a focus on patient safety, compassionate care, and improving access to evidence-based treatments including Spravato®.
Dr. Cheryl Malina, a board-certified emergency medicine physician, is the co-founder of Keta Medical Center. With over 15 years of experience, Dr. Malina has practiced extensively in hospitals across the Bronx and Westchester. She graduated Phi Beta Kappa from Barnard College at Columbia University and earned her medical degree from Albert Einstein College of Medicine, completing her residency at the Jacobi/Montefiore Emergency Medicine Program. Dr. Malina later moved to attending physician roles at several hospitals, most recently as an attending physician at the Good Samaritan Hospital in Suffern, New York.
Dr. Malina’s interest in ketamine therapy was sparked during the COVID-19 pandemic, as she observed a surge in acute psychiatric cases. Impressed by the rapid, positive changes ketamine brought about in patients she became a strong advocate for its use in treating conditions like depression, anxiety, and PTSD.
Moshe Malina is the CEO of Keta Medical Center. Prior to joining Keta, he spent more than 20 years at Citi in senior leadership roles across technology and legal departments. Most recently, he led a global team responsible for major technology transformations and remediation initiatives. Earlier in his tenure, Moshe served in Citi’s legal department, where he managed teams overseeing patents, mergers and acquisitions, venture investments, and complex tech transactions, and served as general counsel of Citi Ventures, the firm’s corporate venture arm. He began his career as an attorney at Cleary Gottlieb. He holds a Juris Doctor from Columbia Law School and a Bachelor of Science in Chemical Engineering from Columbia Engineering.
As COO, Rachel Olstein Kaplan leads operations and growth strategy for Keta Medical Center. She is passionate about ensuring that more people have access to high-quality, compassionate and effective mental health care. Rachel previously founded and ran Aurora Marketing, and spent seven years at Wix.com. She has served as vice president of marketing at StuffThatWorks, a startup using AI-powered crowdsourcing to help patients identify effective treatments for their conditions, and consulted for KHealth, where she helped build their digital library of healthcare resources. Rachel brings over a decade of experience at the intersection of healthcare, technology, and marketing.
Yoni Bak has over 25 years of construction management experience and a background in civil engineering. He will be overseeing the expansion of the practice into new markets in Long Island, Westfield, NJ and NYC. Yoni is committed to making sure all new offices provide the same warm and pleasant environment our patients have come to expect from Keta Medical Center. Yoni will also be coordinating the implementation of management technology to streamline business operations. Yoni lives in NJ with his wife, 4 children and Bichon-Poodle.
Orli Tesler leads the Insurance and Billing team at Keta Medical Center, ensuring the department operates efficiently through structured systems, clear communication, and strong collaboration. Before joining Keta, she spent over a decade in research and development, where she led production teams, built operational frameworks, and translated complex ideas into scalable, efficient systems.
That foundation in design and production process optimization shapes her approach to healthcare operations, where she prioritizes organized systems, seamless data coordination, and communication alignment between the billing team, management, and clinical staff. Her leadership focuses on bringing clarity, structure, and empathy to support both the team and patient care.
Outside of work, Orli enjoys yoga, gardening, and spending weekends camping with her family, always starting the day with a strong cup of coffee.
Luke brings years of experience in recruitment, talent strategy, and human resources leadership within healthcare and professional services. Before joining Keta Medical Center, he spent six years with The Nautical Group, supporting major health systems and corporate clients nationwide. His background also includes recruitment and HR roles with Memorial Sloan Kettering, Northwell Health, and Carson Tahoe Health. At Keta Medical Center, Luke oversees hiring, employee relations, onboarding, and benefits across all locations. He is passionate about building teams that reflect compassion, collaboration, and innovation in mental health care.
Amy is a seasoned Human Resources leader with more than 15 years of experience aligning people strategies with business goals and partnering closely with senior stakeholders to drive organizational success.
She enjoys building trust, navigating complex challenges, and delivering thoughtful, data‑informed solutions that support both employees and the enterprise.
With a career rooted largely in the healthcare industry, Amy brings deep expertise in compensation and benefits, recruiting and talent acquisition, employee relations, workforce planning, and organizational development. She excels at providing strategic counsel to business partners, leading through change, and creating HR programs that enhance engagement, retention, and performance.
Beyond her professional accomplishments, Amy is passionate about fostering inclusive, people‑first cultures and mentoring emerging HR talent.
Outside of work, Amy enjoys spending time with her family, exploring new places and reading.
Peggy is a seasoned human resources and talent acquisition professional with more than 30 years of experience across corporate recruiting, HR management, and office administration. Before joining our team, she spent 14 years as an enterprise recruiter at Experis (a ManpowerGroup division), where she earned the company’s “Circle of Stars” recognition for top performance. Her background also includes HR and recruiting roles with Marriott Corporation, First Federal Savings and Loan, and a boutique law firm. Peggy holds a bachelor’s degree in English and is known for her professionalism, versatility, and commitment to exceptional hiring practices.
Jessica Yankus is a marketing and provider engagement leader at Keta Medical Center, bringing over 15 years of experience in healthcare, behavioral health, and neuroscience. Her work has focused on expanding patient access and driving provider adoption across innovative mental health treatments, including SPRAVATO and ketamine-assisted therapy programs.
Jessica specializes in building referral networks, developing outreach strategies, and translating complex clinical concepts into meaningful, provider-facing engagement. She is particularly passionate about improving access to care for patients who are not responding to traditional treatment and helping clinicians integrate new tools into their practice.
She holds a Master's of Public Health from Boston University and is currently pursuing a License in Mental Health Counseling. Based in Westchester, New York, Jessica is driven by a commitment to advancing the future of mental health care through both clinical understanding and real-world application.
Lucia has a background in healthcare marketing, social media, and communications, with experience creating digital content and campaigns that make health information engaging and accessible. She earned her bachelor’s degree in public relations from the University of Florida and is passionate about creative storytelling and finding meaningful ways to connect with audiences.
Sara joins Keta Medical Center as an operations coordinator, bringing a strong background in project management, process improvement, and organizational excellence. She is known for her keen attention to detail and ability to manage complex initiatives efficiently and thoughtfully. Prior to joining Keta Medical Center, Sara supported several nonprofit organizations across a diverse range of projects, including complex travel programs, large-scale events, and organization-wide process improvement initiatives. She also has private-sector experience in the medical e-commerce space, further strengthening her operational and cross-functional skill set. With an undergraduate background in psychology and economics, Sara is excited to contribute to work that aligns her passion for improving mental health with her love of building clear, effective organizational systems. When she’s not streamlining processes or managing complex project lifecycles, Sara enjoys cooking, shopping, and traveling.
Keta Medical Center in the news
Our locations
6 East 39th St, Suite 600 New York
330 West 38th Street, Suite 311, New York
123 W 86th St. Suite G, New York
7 West 96th St. Suite 1H, New York, NY 10025
26 Court St. Suite 2710, Brooklyn, NY 11242
520 Franklin Avenue, Suite 101, Garden City, NY 11530
77 Quaker Ridge Rd. Suite 212, New Rochelle, NY 10804
690 Kinderkamack Rd. Suite 103, Oradell, NJ 07649
560 Springfield Ave. Suite 101, Westfield, NJ 07090