Our team

The people behind every house call

Senior management and nurse practitioners working together to bring dependable primary care into your home.

Senior management

Meir Vachss, DNP, FNP-BC
Founder & CEO
Dr. Meir Vachss, DNP, FNP-BC, is the Founder and CEO of Kings County House Calls. With more than 20 years of hands-on clinical experience in medicine and a Doctor of Nursing Practice degree, he remains an actively practicing board-certified Family Nurse Practitioner who continues to see patients in the field while leading the organization. Driven by a clear vision to serve an often-overlooked population, Dr. Vachss built the practice to deliver consistent, high-quality medical care directly to homebound geriatric patients. Recognizing that many of these individuals go months between traditional office visits, he created a proactive, home-centered model that brings comprehensive resources to the patient — closing care gaps, preventing complications, and significantly reducing unnecessary hospitalizations. Under his leadership, Kings County House Calls has grown into a scalable, multidisciplinary organization committed to exceptional outcomes for complex, homebound patients across Brooklyn and the New York area. Dr. Vachss remains deeply involved in clinical care, ensuring the practice never strays from its core mission: outstanding, compassionate medicine where patients need it most.
Avraham Y. Vachss, J.D.
Chief Operating Officer
Avraham Y. Vachss, J.D., is a graduate of Cardozo School of Law and serves as Chief Operating Officer for Kings County House Calls and its affiliated companies. With a strong foundation in law and a deep commitment to operational excellence, Avraham oversees internal operations across all departments, ensuring efficiency, compliance, and seamless coordination in the delivery of high-quality home-based medical care. He plays a pivotal role in maintaining and expanding strategic business relationships, actively engaging with referral sources, vendors, partners, and stakeholders at the highest levels. His proactive approach to relationship-building and business development has been instrumental in supporting the practice’s continued growth and success in serving the complex needs of homebound patients.

Nurse practitioners

Amy Lopez, MSN, FNP-BC
Lead NP of Hudson Valley Region
Amyanerys (Amy) Lopez, MSN, FNP-BC, a Family Nurse Practitioner with 1.5 years of NP experience and more than 15 years in healthcare. Amy has a strong clinical background that includes approximately 8 years as a registered nurse, with extensive experience in emergency department care, home care, and community clinic settings. Passionate about providing compassionate, patient-centered care and supporting patients through both urgent and ongoing health needs.
Andrew Wolf
DNP, FNP-C, RN
Dr. Andrew Wolf, DNP, FNP-C, RN earned his Doctor of Nursing Practice (DNP) from Pace University and his nursing degree from Long Island University. He is dedicated to delivering compassionate, patient-centered care, with a focus on improving health outcomes, promoting independence, and enhancing the quality of life for every patient he serves.
Ariel Steinherz
DNP, AGPCNP-BC
Dr. Ariel Steinherz is a board-certified Adult-Gerontology Primary Care Nurse Practitioner dedicated to providing compassionate, patient-centered medical care in the comfort of patients’ homes. He earned his Doctor of Nursing Practice (DNP) degree from Gannon University and has experience caring for older adults and medically complex patients with chronic conditions, acute illnesses, and mobility limitations. His clinical interests include chronic disease management, preventive care, wound care, and improving access to high-quality healthcare for homebound individuals. Dr. Steinherz is passionate about building meaningful relationships with patients and their families while delivering personalized, evidence-based care that promotes independence, comfort, and quality of life.
Asher Kohanteb
MSN, FNP-BC
Asher Kohanteb, MSN, FNP-BC, is a Family Nurse Practitioner with Kings County House Calls, providing comprehensive, patient-centered primary care to geriatric patients in the comfort of their homes. Drawing on six years of combined experience as both a Registered Nurse and Nurse Practitioner, including practice in emergency medicine, a Level I trauma center, and pediatric emergency care, he brings a broad clinical foundation to every patient encounter. Asher is committed to delivering compassionate, accessible, and preventative care that is thoughtfully tailored to each individual's unique needs, combining modern, evidence-based medicine with a personal touch. Fluent in English, Hebrew, and Farsi, he is dedicated to building meaningful relationships with patients and families while helping them achieve the highest possible quality of life.
Branny Tavarez
MSN, FNP-BC
Branny Tavarez, MSN, FNP-BC, is a compassionate healthcare professional with over 18 years of combined clinical experience, including 12+ years as a licensed physician in the Dominican Republic and 6 years as a Registered Nurse in the United States. Experienced in rehabilitation, long-term care, home health, and primary care, with strong leadership and clinical management skills. Committed to delivering high-quality, patient-centered care while ensuring regulatory compliance and improving patient outcomes.
Carla Rosa de Jesus
MSN, APRN, FNP-C, RN
Carla Rosa de Jesus, MSN, APRN, FNP-C, RN, is an AANP-certified Family Nurse Practitioner with over 10 years of healthcare experience specializing in primary care, geriatrics, chronic disease management, and home-based healthcare. Her professional interests include preventive medicine, geriatric care, chronic disease management, and the integration of mental health services into primary care.
Devorah Hillelsohn
Clinical Educator · MSN, APRN, FNP-C
Devorah Hillelsohn is a Family Nurse Practitioner with over ten years of experience in chronic care management, geriatric health, and community-based healthcare. As an FNP Clinical Educator at Kings County Housecalls, she provides clinical education, mentorship, and support to healthcare providers caring for a complex patient population. Devorah is committed to advancing evidence-based practice, strengthening clinical excellence, and improving health outcomes through high-quality, patient-centered care.
Jenny Krinets
MSN, FNP-C
Jenny Krinets, MSN, FNP-C, began her healthcare career with clinical training in Traditional Chinese Medicine (TCM), 4 years in Reidman college Israel, completing a 480-hour internship at Zhejiang Provincial Hospital of Traditional Chinese Medicine in Hangzhou, China. Training included acupuncture, Tuina, Herbs. Later earned an Associate Degree in Nursing from Kingsborough Community College, a Bachelor of Science in Nursing from New York City College of Technology (City Tech), and a Master of Science in Nursing–Family Nurse Practitioner from United States University. With six years of experience as a home care registered nurse and now as a board-certified Family Nurse Practitioner. Education included primary care, preventive medicine, chronic disease management, and integrating evidence-based practice with holistic principles to improve patient outcomes.
Jessica Laine
MSN, FNP-BC
Jessica Laine, MSN, FNP-BC, is a dedicated Nurse Practitioner with two years of clinical experience specializing in geriatric care. She is passionate about delivering compassionate, evidence-based care to older adults, with a strong focus on healthy aging, effective chronic disease management, and enhancing overall quality of life. Her approach is rooted in patient-centered care, where she prioritizes building trusting relationships, thorough patient and family education, and collaborative decision-making. Jessica works closely with patients, families, and interdisciplinary teams to develop personalized care plans that address both medical needs and individual goals. She is deeply committed to clinical excellence, advocacy, and lifelong learning, regularly staying current with the latest advancements in geriatric medicine to provide the highest standard of care. Her goal is to support each patient in achieving greater independence, comfort, and well-being in the comfort of their own home.
Julia Ilyayeva
MSN, AGPCNP-BC
Julia Ilyayeva MSN, FNP - BC earned a Bachelor of Science in Nursing from Adelphi University and worked as a Registered Nurse at NYU Langone Health for five years. Julia cared for patients with advanced heart failure and heart transplants in Cardiology and later transitioned to the Cardiac Critical Care Unit (CCU) during the COVID-19 pandemic while completing her Master of Science in Nursing at Hunter College as an Adult-Gerontology Nurse Practitioner. After graduation, Julia briefly practiced in Obstetrics and Gynecology before transitioning to home-based primary care, where she has been providing comprehensive, compassionate, patient-centered care.
Mark Khaimov
MSN, FNP-BC
Mark Khaimov, MSN, FNP-BC, is a devoted Nurse practitioner with over 8 years of overall nursing home care experience. In his early years as a he specialized in wound care, and has extensive experience caring for chronic wounds,and developing an individualized treatment plan for each of his patients. He now continues to deliver high quality care, while working collaboratively with patients in order to optimize healing in the comfort of their own homes.
Morty Fonfeder
MSN, FNP-BC
Morty Fonfeder, MSN, FNP-BC, is a board-certified Family Nurse Practitioner dedicated to providing compassionate, patient-centered primary care through home visits. He specializes in the management of acute and chronic medical conditions, with a focus on preventive care, chronic disease management, and improving quality of life for his patients. Morty is committed to building strong relationships with patients and their families while delivering evidence-based, individualized care in the comfort of their homes.
Nadezhda Musayev
MSN, FNP-BC
Nadezhda (Nadya) Musayev, MSN, FNP-BC, has been a Registered Nurse since 2009, with more than 12 years of experience on a medical-surgical unit, where she built a strong foundation in caring for patients with a wide range of acute and chronic medical conditions. After becoming a Family Nurse Practitioner, Nadya gained experience in several urgent care centers before transitioning to house calls, where she provides personalized, compassionate, and patient-centered care in the comfort of her patients' homes. Nadya is committed to delivering high-quality, evidence-based care while building trusting relationships with her patients and their families.
Nissan Eber
MSN, APRN, FNP-BC
Nissan Eber, MSN, APRN, FNP-BC, is a Family Nurse Practitioner who is passionate about bringing high-quality medical care directly to patients in their homes. He believes healthcare is about more than treating illnesses—it's about building trust, listening with compassion, and making every patient feel cared for. Nissan strives to treat each patient with the same level of kindness, respect, and dedication he would want for his own loved ones. His mission is to help patients maintain their health, independence, and quality of life while providing care that is thoughtful, personalized, and centered around their individual needs.
Rashawn David Collier
MSN, FNP-BC
Rashawn David Collier is a board-certified Family Nurse Practitioner with extensive experience providing primary, acute, and chronic care across diverse healthcare settings. With more than five years of nursing experience and advanced training from Long Island University, he specializes in comprehensive patient assessments, chronic disease management, preventive care, and wellness-focused treatment plans. His background as a registered nurse includes emergency medicine, oncology, rehabilitation, medical-surgical nursing, and in-home primary care, allowing him to deliver evidence-based, patient-centered care to individuals across the lifespan. Rashawn is passionate about improving healthcare accessibility, promoting disease prevention, and empowering patients through education and collaborative decision-making. He is particularly interested in chronic disease management, health promotion, and fostering meaningful relationships that support long-term patient well-being.
Rosa Yaneri Bueno Caceres
MSN, FNP-BC
Rosa Yaneri Bueno Caceres, MSN, FNP-BC, is a dedicated Family Nurse Practitioner with a strong clinical foundation and a unique background as a physician trained in the Dominican Republic (Doctor of Medicine, cum laude). She completed her Master of Science in Nursing – Family Nurse Practitioner program at Miami Regional University. Bilingual in Spanish and English, Rosa is committed to delivering compassionate, culturally sensitive, patient-centered care. She brings deep clinical expertise and a passion for supporting geriatric and homebound patients — closing care gaps, preventing complications, and improving quality of life at home.
Yisroel Rosenfeld
Yisroel Rosenfeld, MSN, FNP-BC
Yisroel Rosenfeld began his career in healthcare as an EMT at Senior Care EMS. Seeing firsthand how patients frequently fell through the cracks of the healthcare system inspired him to pursue advanced clinical training to make a deeper impact. He earned a Bachelor's degree in Biology from Touro University, followed by a Bachelor's degree in Nursing from New Jersey City University. After gaining valuable clinical experience working at Maimonides Medical Center, Yisroel advanced his education by completing his Family Nurse Practitioner program at United States University. During his advanced training, he gained extensive hands-on experience under the mentorship of Joseph Kaplovitz, DO, Abraham Eisenman, FNP-BC, and Barry Gordon, MD.