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Gritz Pierre, MD, is the founder, owner, and medical director of Genesis Personal Healthcare Medicine based in New York City. He is a board-certified physician with dual certification in Emergency Medicine and Family Medicine and holds an MBA with a concentration in Healthcare Administration. His background combines extensive frontline clinical experience with formal training in healthcare management, supporting both the clinical and operational requirements of the Company.

Dr. Pierre maintains active medical licenses across multiple U.S. states, enabling nationwide telemedicine practice and supporting the Company’s multi-state service delivery model. His clinical experience spans high-acuity emergency departments, critical access hospitals, ICU-capable facilities, and inpatient hospital medicine settings. In addition, he has extensive outpatient experience working in rural clinics throughout Southern Illinois, providing primary and urgent care services in medically underserved communities.

His professional experience includes independent emergency medicine practice, nocturnist hospital medicine, and ICU-level patient management. Dr. Pierre has served in environments requiring autonomous decision-making, rapid clinical assessment, and coordination of complex care, including stabilization of critically ill patients prior to ICU admission or interfacility transfer.

He has also participated in healthcare fairs and community outreach events, providing physical examinations and preventive care services for local schools and community members.

In addition to his clinical background, Dr. Pierre’s MBA training provides experience in healthcare administration, operations, and financial oversight. This dual competency supports informed governance of Genesis Personal Healthcare Medicine, particularly in areas of regulatory compliance, provider oversight, and operational scalability.

Dr. Marissa T. Santos has more than 25 years of experience as a board-certified internist and aesthetic medicine physician. At her Woodside, New York solo practice, Marissa T. Santos, M.D., Dr. Santos offers a wide variety of care for adult patients, including preventive health care, laser hair removal, CoolSculpting® fat removal, screenings including Pap smear, and many other kinds of care. As a licensed Civil Surgeon, Dr. Santos performs medical immigration exams as well.

Dr. Santos is Patient-Centered Medical Home (PCMH) certified. The PCMH certification is a highly respected one that means a physician is qualified to manage the entire spectrum of patient health needs. If patients need specialists, they’re right on the premises. Dr. Santos maintains local hospital affiliations to be there for her patients at all times,

Having earned her medical degree at the University of Santo Tomas in Manila, Philippines, Dr. Santos then continued her medical education at the State University of New York Downstate Medical Center, the Jersey Shore University Medical Center, and the New York Hospital in Queens. Dr. Santos regularly attends internal medicine conferences so that she can keep her practice up-to-date with the newest advances in medicine.

Dr. Santos speaks Spanish, English, Filipino, and Russian, and she enjoys talking with patients in the language they feel most comfortable speaking. Use the online appointment tool to schedule now, or call for an appointment with Dr. Santos.

Anastasios Manessis, MD, FACE, ECNU, ABOM, is a double-board certified physician at  Endocrine Associates of West Village PC in Murray Hill, Manhattan, and Long Island City, New York, specializing in endocrinology, diabetes, and metabolism and obesity medicine. Dr. Manessis has an endocrine certification in neck ultrasounds and has extensive experience in diagnosing, treating, and managing endocrine disorders, including diabetes, thyroid disorders, hormonal dysfunction, and obesity.  

Dr. Manessis pursued his undergraduate education at Manhattan College, graduating magna cum laude with distinction in biochemistry. He earned his medical degree from the State University of New York at Buffalo. Dr. Manessis completed a combined residency in internal medicine and pediatrics at New York Medical College at Saint Vincent’s Hospital in New York. Following a year as chief medical resident, he completed a two-year clinical fellowship in endocrinology, diabetes, and metabolism, where his research interest, among others, involved the use of insulin pumps in patients with Type II diabetes. 

In addition to his clinical practice, Dr. Manessis was a faculty member in the Department of Medicine at New York Medical College from 2008-2010. He then joined the faculty of New York University in 2011. He has been involved in many clinical research projects, including long-term studies to evaluate the efficacy and safety of GLP-I agonists and weight loss agents. Dr. Manessis’ primary clinical interest includes the treatment of diabetic patients with insulin pumps and how it has benefited the well-being of patients long-term.

Mikhail Kapchits, MD, is an accomplished cardiologist and a co-founder of Advanced Medical Care. Through his role at the practice, Dr. Kapchits assists patients from Brighton Beach (Brooklyn) and Forest Hills (Queens), New York. 

Education has always shaped Dr. Kapchits’ life. He earned both his undergraduate and medical degrees from Moscow Medical Stomatological Institute in Russia and remained in his nation of birth to complete his first internship. He also completed internships in internal medicine at Municipal Hospital #50, known as Moscow Central Clinical Hospital, in Moscow, Russia, and at St. John’s Episcopal Hospital in Far Rockaway, New York. 

A residency in internal medicine and a fellowship in cardiovascular disease at Long Island Jewish Medical Center in New York rounded out Dr. Kapchits’ training. He continues seeking opportunities to expand his knowledge and skill set in all aspects of neurology. Dr. Kapchits is also a board-certified cardiologist. 

In addition, Dr. Kapchits is presently affiliated with New York-Presbyterian/Queens Hospital, Northwell Health, and Long Island Jewish Medical Center in Queens. 

Dr. Kapchits is passionate about the importance of delivering the highest standard of care to those who rely on him. He takes the time to build true bonds with his patients, understanding that outstanding care requires personal connections.

MD Care Now PC provides the highest level of health care to the Forest Hills, New York residents. Ananthakumar Thillainathan, MD, and the professional medical team offer a wide range of services for many healthcare needs.

They support women’s health with in-house services, including sonograms (ultrasound) and Pap smears. They also provide physical exams for children 12 and older — whether going back to school or playing sports — and for adults starting a job at a new workplace or those needing annual checkups.

For weight loss management, the providers carefully consider the individual’s goals and develop a plan tailored to the patient’s needs and lifestyle. For convenience, they offer walk-in and same-day appointments for all conditions like urgent care needs, diabetes testing, high blood pressure concerns and treatment, and sexually transmitted disease (STD) testing.

They also provide in-house allergy testing, electrocardiograms (ECG), echocardiograms, and lung function tests. No matter your health needs, the team has the expertise to provide superior care and treatment to every patient.

The practice has several providers offering patients a wide range of availability for appointments Monday through Saturday. Don’t hesitate to book a visit with the MD Care Now PC team. For an appointment, call the office today, use the online scheduler, or walk into the practice.

Dr. Ora Pearlstein’s interest in medicine began with a love of biology while completing her Bachelor of Arts at Barnard College in New York, graduating Magna Cum Laude, Phi Beta Kappa and receiving the Constance Von Wahl Award for Excellence in Biology.  Dr. Pearlstein graduated from The University of Maryland School of Medicine in 1995, where she was elected to the Alpha Omega Alpha Honor Medical Society.  She completed her internship and residency in internal medicine at Beth Israel Hospital in Boston, a hospital of Harvard Medical School, and became board certified in Internal Medicine in 1998.

After completing her residency, Dr. Pearlstein joined the faculty at the College of Physicians and Surgeons of Columbia University where she was an Assistant Clinical Professor of Medicine and served as the course director of the Introduction to Clinical Practice course for medical students.  Dr. Pearlstein also worked as a clinician and educator at Long Island College Hospital, before joining Downtown Primary Care and the faculty at New York University Langone Medical Center, as an Assistant Clinical Professor in Internal Medicine. 

As a concierge physician, Dr. Pearlstein enjoys being able to focus on patient-centered care and promoting wellness and a healthy lifestyle.  She has been practicing medicine in New York for 25 years and is recognized as a Castle Connolly Top Doctor, New York Super Doctor, and an Exceptional Woman in Medicine.

Anastasios Manessis, MD, FACE, ECNU, ABOM, is a board-certified endocrinologist and the medical director at neXendo Wellness, located in the Long Island City neighborhood of Queens and the Murray Hill neighborhood of Manhattan, New York City.

It all began with an idea. An idea involving more than just a prescription – an idea that would involve an entire team. That idea, healthy living. Dr. Manessis is a firm believer in the total spectrum of health. As a double board-certified medical doctor in Endocrinology, Diabetes, and Metabolism, and Obesity Medicine, Dr. Manessis has witnessed how an individual's health is impacted by multiple factors ranging from medication to hormones and diet. He understands that a comprehensive approach to health is the only true option. neXendo Wellness is the living embodiment of this idea.

To schedule an appointment with Dr. Manessis and the team at neXendo Wellness, call the nearest office or request an appointment online today. 

Anastasios Manessis, MD, FACE, ECNU, ABOM, is a double-board certified physician at  Endocrine Associates of West Village PC in Murray Hill, Manhattan, and Long Island City, New York, specializing in endocrinology, diabetes, and metabolism and obesity medicine. Dr. Manessis has an endocrine certification in neck ultrasounds and has extensive experience in diagnosing, treating, and managing endocrine disorders, including diabetes, thyroid disorders, hormonal dysfunction, and obesity.  

Dr. Manessis pursued his undergraduate education at Manhattan College, graduating magna cum laude with distinction in biochemistry. He earned his medical degree from the State University of New York at Buffalo. Dr. Manessis completed a combined residency in internal medicine and pediatrics at New York Medical College at Saint Vincent’s Hospital in New York. Following a year as chief medical resident, he completed a two-year clinical fellowship in endocrinology, diabetes, and metabolism, where his research interest, among others, involved the use of insulin pumps in patients with Type II diabetes. 

In addition to his clinical practice, Dr. Manessis was a faculty member in the Department of Medicine at New York Medical College from 2008-2010. He then joined the faculty of New York University in 2011. He has been involved in many clinical research projects, including long-term studies to evaluate the efficacy and safety of GLP-I agonists and weight loss agents. Dr. Manessis’ primary clinical interest includes the treatment of diabetic patients with insulin pumps and how it has benefited the well-being of patients long-term.