Cardiologist providers include doctors, nurses, nurse practitioners, and physician assistants. They often maintain long-term relationships with you and advise and treat you on a range of health related issues.
Chiropractor providers include doctors, nurses, nurse practitioners, and physician assistants. They often maintain long-term relationships with you and advise and treat you on a range of health related issues.
Dentist providers include doctors, nurses, nurse practitioners, and physician assistants. They often maintain long-term relationships with you and advise and treat you on a range of health related issues.
Dermatologist providers include doctors, nurses, nurse practitioners, and physician assistants. They often maintain long-term relationships with you and advise and treat you on a range of health related issues.
Family Physician providers include doctors, nurses, nurse practitioners, and physician assistants. They often maintain long-term relationships with you and advise and treat you on a range of health related issues.
OB-GYN providers include doctors, nurses, nurse practitioners, and physician assistants. They often maintain long-term relationships with you and advise and treat you on a range of health related issues.
Ophthalmologist providers include doctors, nurses, nurse practitioners, and physician assistants. They often maintain long-term relationships with you and advise and treat you on a range of health related issues.
Orthopedic Surgeon providers include doctors, nurses, nurse practitioners, and physician assistants. They often maintain long-term relationships with you and advise and treat you on a range of health related issues.
Pediatrician providers include doctors, nurses, nurse practitioners, and physician assistants. They often maintain long-term relationships with you and advise and treat you on a range of health related issues.
Physical Therapist providers include doctors, nurses, nurse practitioners, and physician assistants. They often maintain long-term relationships with you and advise and treat you on a range of health related issues.
Podiatrist providers include doctors, nurses, nurse practitioners, and physician assistants. They often maintain long-term relationships with you and advise and treat you on a range of health related issues.
Psychiatrist providers include doctors, nurses, nurse practitioners, and physician assistants. They often maintain long-term relationships with you and advise and treat you on a range of health related issues.
Margaret I. Chustecki, MD, MBA, is a skilled internist at Internal Medicine of Greater New Haven in Hamden, West Haven, and Milford, Connecticut. She is also an assistant clinical professor at Yale School of Medicine.
Born in Warsaw, Poland, and educated at Warsaw Medical School, Dr. Chustecki completed her internship and residency at Newton Wellesley Hospital and New England Medical Center in Massachusetts. Before joining Yale University as a clinical instructor, Dr. Chustecki started Internal Medicine of Greater New Haven in 2003.
Since then, the practice has flourished, boasting some of the best internists and providers in the United States. Dr. Chustecki maintains patients at the practice while teaching at Yale School of Medicine. She supervises up-and-coming medical professionals while educating them on the benefits of efficient health care.
Dr. Chustecki remains active in research, and has contributed to over 55 medical publications. She co-founded Chase Medical Research of Greater New Haven in 2015, and serves as the chief clinical trial investigator.
“Jessica is fantastic! She and all the staff will make you feel welcomed. She is prompt in responding to my needs and an excellent communicator. I would highly recommend her and this group to all my family and friends”
Margaret I. Chustecki, MD, MBA, is a skilled internist at Internal Medicine of Greater New Haven in Hamden, West Haven, and Milford, Connecticut. She is also an assistant clinical professor at Yale School of Medicine.
Born in Warsaw, Poland, and educated at Warsaw Medical School, Dr. Chustecki completed her internship and residency at Newton Wellesley Hospital and New England Medical Center in Massachusetts. Before joining Yale University as a clinical instructor, Dr. Chustecki started Internal Medicine of Greater New Haven in 2003.
Since then, the practice has flourished, boasting some of the best internists and providers in the United States. Dr. Chustecki maintains patients at the practice while teaching at Yale School of Medicine. She supervises up-and-coming medical professionals while educating them on the benefits of efficient health care.
Dr. Chustecki remains active in research, and has contributed to over 55 medical publications. She co-founded Chase Medical Research of Greater New Haven in 2015, and serves as the chief clinical trial investigator.
“Jessica is fantastic! She and all the staff will make you feel welcomed. She is prompt in responding to my needs and an excellent communicator. I would highly recommend her and this group to all my family and friends”
Morris Papernik, MD, FACP, is an experienced physician serving patients at Internal Medicine of Greater New Haven in the West Haven and Stratford, Connecticut, office.
A native New Yorker, Dr. Papernik graduated from Rush Medical College in Chicago, Illinois. He completed his residency in internal medicine at Rush and is a fellow of the American College of Physicians.
He has distinguished himself as a national thought leader in chronic fatigue syndrome, fibromyalgia, migraine headaches, diabetes, hypertension, and hyperlipidemia. Dr. Papernik has served on the Medical Presidential Advisory Committee to President Bush and Obama within the Department of Health and Human Services in Washington, DC.
Upon moving to Connecticut to be closer to family in 2008, he brought his expertise to Connecticut and now to Internal Medicine of Greater New Haven. Dr. Papernik has received numerous teaching awards and the Primary Care Leadership Award from the Connecticut Center for Primary Care. He has given multiple TV, radio, and newspaper interviews nationally.
Dr. Papernik enjoys teaching medical and nurse practitioner students from Yale, UConn, and
Netter School of Medicine. He also likes spending his free time with family and enjoys photography.
“Jessica is fantastic! She and all the staff will make you feel welcomed. She is prompt in responding to my needs and an excellent communicator. I would highly recommend her and this group to all my family and friends”
My consistent approach to caring for my patients are: always listening to their concerns, coming up with an agreeable treatment plan together, and making sure they understand their treatment plan, medications, and goals.
Margaret I. Chustecki, MD, MBA, is a skilled internist at Internal Medicine of Greater New Haven in Hamden, West Haven, and Milford, Connecticut. She is also an assistant clinical professor at Yale School of Medicine.
Born in Warsaw, Poland, and educated at Warsaw Medical School, Dr. Chustecki completed her internship and residency at Newton Wellesley Hospital and New England Medical Center in Massachusetts. Before joining Yale University as a clinical instructor, Dr. Chustecki started Internal Medicine of Greater New Haven in 2003.
Since then, the practice has flourished, boasting some of the best internists and providers in the United States. Dr. Chustecki maintains patients at the practice while teaching at Yale School of Medicine. She supervises up-and-coming medical professionals while educating them on the benefits of efficient health care.
Dr. Chustecki remains active in research, and has contributed to over 55 medical publications. She co-founded Chase Medical Research of Greater New Haven in 2015, and serves as the chief clinical trial investigator.
“Jessica is fantastic! She and all the staff will make you feel welcomed. She is prompt in responding to my needs and an excellent communicator. I would highly recommend her and this group to all my family and friends”
Morris Papernik, MD, FACP, is an experienced physician serving patients at Internal Medicine of Greater New Haven in the West Haven and Stratford, Connecticut, office.
A native New Yorker, Dr. Papernik graduated from Rush Medical College in Chicago, Illinois. He completed his residency in internal medicine at Rush and is a fellow of the American College of Physicians.
He has distinguished himself as a national thought leader in chronic fatigue syndrome, fibromyalgia, migraine headaches, diabetes, hypertension, and hyperlipidemia. Dr. Papernik has served on the Medical Presidential Advisory Committee to President Bush and Obama within the Department of Health and Human Services in Washington, DC.
Upon moving to Connecticut to be closer to family in 2008, he brought his expertise to Connecticut and now to Internal Medicine of Greater New Haven. Dr. Papernik has received numerous teaching awards and the Primary Care Leadership Award from the Connecticut Center for Primary Care. He has given multiple TV, radio, and newspaper interviews nationally.
Dr. Papernik enjoys teaching medical and nurse practitioner students from Yale, UConn, and
Netter School of Medicine. He also likes spending his free time with family and enjoys photography.
“Jessica is fantastic! She and all the staff will make you feel welcomed. She is prompt in responding to my needs and an excellent communicator. I would highly recommend her and this group to all my family and friends”
Deborah Seymour APRN began her medical career in London, England, where she graduated from the Royal Free School of Nursing in 1993. She is a board-certified acute adult gerontology specialist with over 30 years' experience in caring for the older adult.
She attended Sacred Heart University where she obtained her Bachelor's degree, and practiced in critical care at UCONN Medical Center, St Francis Hospital in the cardiac ICU and the Emergency Room.
Deborah did her graduate studies at the University of Connecticut. Following graduation, she practiced in the Cardiac ICU at Yale New Haven Hospital. She was a clinical faculty member at Yale University School of Nursing.
Deborah has practiced at many of Connecticut’s hospitals, including UCONN Medical Center, St Francis Hospital, Yale New Haven Hospital, Backus Hospital, St Mary’s Hospital, Middlesex Hospital and Hospital of Central Connecticut.
She now practices in internal medicine and specializes in chronic disease management.
Medical Compass MD, led by David Dunaief, MD, is an integrative, functional, and lifestyle medicine practice with offices in Brooklyn Heights, Brooklyn, in New York City and in Setauket, New York, on Long Island.
Dr. Dunaief takes a plant-based approach to wellness as derived through nutritional medicine and lifestyle interventions that reverse, prevent and treat chronic disease. He takes an individualized approach to care, using cutting-edge medical research to guide his decision making.
Medical Compass MD specializes in chronic care management, providing integrative medicine treatments for conditions like autoimmune disorders, diabetes, migraines, and heart disease.
With a focus on preventive medicine, Dr. Dunaief’s integrative approach uses the low inflammatory foods every day (LIFE) diet — a plant-based, nutrient-dense, whole-foods approach to health and wellness.
Dedicated to improving health care for all, the practice produces cutting-edge research on the LIFE diet that has been published in peer-reviewed medical journals.
At Medical Compass MD, the focus is on reversing, treating, and preventing chronic disease by connecting conventional medicine with lifestyle modifications. This approach gives patients the ability to take a more proactive role in managing their own health.
For evidence-based medical care for optimal health, call Medical Compass MD or request an appointment online today.
Gautam Ahluwalia, MD is an internal medicine and primary care physician with over 25 years of experience delivering holistic, evidence-based care focused on optimizing patient outcomes and building long-term, patient-centered relationships. He earned his medical degree and completed his internal medicine residency at the All India Institute of Medical Sciences (AIIMS), New Delhi—India’s top-ranked medical institution.
Dr. Ahluwalia previously served as Professor and Chief of Internal Medicine at a leading tertiary care medical school in North India, where he mentored thousands of medical students and residents and held senior leadership roles ensuring excellence in clinical care, education, and accreditation. An award-winning clinician, educator, and published author, he is recognized for his ethical, patient-first approach to care.
Dr. Ahluwalia now provides personalized primary care at Stoneleigh Medical Group’s Yorktown Heights and Brewster offices, where he is accepting new patients.
Rajiv Perinbasekar MD, is a gastroenterologist at Westchester Putnam Gastroenterology. He is passionate about providing high quality and personalized care to patients living in Putnam and northern Westchester.
Dr. Perinbasekar received his medical degree from SUNY Downstate Health Sciences University. He completed his internship and residency in Internal Medicine at the University of Maryland Medical Center in Baltimore, Maryland. During his residency he received awards for his research in inflammatory bowel disease. He then completed his fellowship in Gastroenterology and Hepatology at Hofstra-Northwell at Northshore University Hospital and Long Island Jewish Medical Center, where he also served as Chief Fellow.
Dr. Perinbasekar is knowledgeable in the treatment of digestive diseases of the gastrointestinal system and the liver, including colorectal cancer screening, irritable bowel syndrome, inflammatory bowel disease, and chronic liver disease. He has a special interest in using new technologies to enhance patient care.
Dr. Perinbasekar is currently accepting new patients.
Withhis advanced training in primary care and urgent care, Josh Shajan, MD, is the go-to provider for patients and their families in and around Greenwich, Stamford and areas. He cares for patients at Greenwich Primary Care in the Cos Cob neighborhood of Greenwich, and serves as Medical Director of the practice.
After attending Bergen Catholic High School, Dr. Shajan earned admission to an 8-year BS/MBA/MD program, completing his bachelor’s degree at Union College in Schenectady, New York, his Master of Business Administration through Union Graduate College, and then received his Doctor of Medicine from Albany Medical College in New York in 2012.
Dr. Shajan then completed his residency in internal medicine through the Yale University School of Medicine at Greenwich Hospital in Connecticut.
Since completing residency, Dr. Shajan has provided comprehensive primary and urgent care services continuously in Greenwich. Additionally, he has also previously served as the medical director for a network of New York City-based urgent cares, prior to joining a private practice in Greenwich in 2018. WIth the launch of Greenwich Primary Care, Dr. Shajan continues his tenure of providing high-quality care comprehensive primary and immediate care for numerous Greenwich and surrounding-area residents and their families.
When he’s not busy caring for patients, Dr. Shajan enjoys spending time withhiswifeKavya, and their son at their home in Greenwich.
Melanie R. Weiner, PA-C, is a dedicated physician assistant committed to delivering top-notch, empathetic healthcare to her patients. With a wealth of experience serving diverse communities, Melanie currently practices at Greenwich Primary Care in Stamford, Connecticut.
After earning her bachelor’s degree in allied health from the University of Connecticut in Storrs, Melanie pursued her passion for healthcare by obtaining her Master of Physician Assistant Studies (MPAS) from Pace University – Lenox Hill Hospital in New York, NY. During her tenure at Pace University, Melanie distinguished herself as a PA didactic student tutor and was honored with induction into the prestigious Pi Alpha – National Honor Society.
Driven by a desire to foster enduring connections with her patients, Melanie gravitated towards primary care. She believes in a patient-centric approach to medicine, emphasizing collaboration and support throughout every stage of life. Melanie's dedication to personalized care ensures that each patient receives a tailored treatment plan aimed at optimizing their overall well-being.
With Melanie, patients can expect compassionate care grounded in expertise and a genuine commitment to their health. Whether addressing acute concerns or providing ongoing preventive care, Melanie strives to make a meaningful difference in the lives of those she serves.
Dr. Mansourati is a board-certified internal medicine physician widely recognized for his compassionate, evidence-based, and patient-centered approach to care. He is deeply committed to building strong, lasting relationships with his patients—empowering them with knowledge and support to live healthier, more fulfilling lives. With a unique blend of clinical expertise, research experience, and holistic care philosophy, Dr. Mansourati delivers care that is both comprehensive and deeply personalized.
He earned his medical degree from the University of Kalamoon and went on to join Duke University as a Postdoctoral Researcher, where he studied cell biology and the cancer microenvironment. His passion for advancing medical science continued at the University of Southern California, where he contributed to research on innovative cancer therapeutics.
Dr. Mansourati completed his internal medicine residency at MedStar Health in Baltimore, gaining broad experience in managing complex medical conditions and delivering high-acuity urgent care. During this time, he also collaborated with Johns Hopkins University on cutting-edge research projects.
His dedication to advancing clinical care and research led to his selection for the competitive Hematology and Oncology fellowship at St. Joseph's University Medical Center. While he continues to train in this specialized field, Dr. Mansourati remains deeply connected to his roots in internal medicine and is proud to bring his diverse expertise to the patients of Greenwich Primary Clinic.
Outside of his medical career, Dr. Mansourati leads an active lifestyle and enjoys mountain biking, hiking, CrossFit, and playing basketball.
Dr. Mansourati is a board-certified internal medicine physician widely recognized for his compassionate, evidence-based, and patient-centered approach to care. He is deeply committed to building strong, lasting relationships with his patients—empowering them with knowledge and support to live healthier, more fulfilling lives. With a unique blend of clinical expertise, research experience, and holistic care philosophy, Dr. Mansourati delivers care that is both comprehensive and deeply personalized.
He earned his medical degree from the University of Kalamoon and went on to join Duke University as a Postdoctoral Researcher, where he studied cell biology and the cancer microenvironment. His passion for advancing medical science continued at the University of Southern California, where he contributed to research on innovative cancer therapeutics.
Dr. Mansourati completed his internal medicine residency at MedStar Health in Baltimore, gaining broad experience in managing complex medical conditions and delivering high-acuity urgent care. During this time, he also collaborated with Johns Hopkins University on cutting-edge research projects.
His dedication to advancing clinical care and research led to his selection for the competitive Hematology and Oncology fellowship at St. Joseph's University Medical Center. While he continues to train in this specialized field, Dr. Mansourati remains deeply connected to his roots in internal medicine and is proud to bring his diverse expertise to the patients of Greenwich Primary Clinic.
Outside of his medical career, Dr. Mansourati leads an active lifestyle and enjoys mountain biking, hiking, CrossFit, and playing basketball.
Withhis advanced training in primary care and urgent care, Josh Shajan, MD, is the go-to provider for patients and their families in and around Greenwich, Stamford and areas. He cares for patients at Greenwich Primary Care in the Cos Cob neighborhood of Greenwich, and serves as Medical Director of the practice.
After attending Bergen Catholic High School, Dr. Shajan earned admission to an 8-year BS/MBA/MD program, completing his bachelor’s degree at Union College in Schenectady, New York, his Master of Business Administration through Union Graduate College, and then received his Doctor of Medicine from Albany Medical College in New York in 2012.
Dr. Shajan then completed his residency in internal medicine through the Yale University School of Medicine at Greenwich Hospital in Connecticut.
Since completing residency, Dr. Shajan has provided comprehensive primary and urgent care services continuously in Greenwich. Additionally, he has also previously served as the medical director for a network of New York City-based urgent cares, prior to joining a private practice in Greenwich in 2018. WIth the launch of Greenwich Primary Care, Dr. Shajan continues his tenure of providing high-quality care comprehensive primary and immediate care for numerous Greenwich and surrounding-area residents and their families.
When he’s not busy caring for patients, Dr. Shajan enjoys spending time withhiswifeKavya, and their son at their home in Greenwich.
Mark Bergman, MD, is triple-board certified in internal medicine, cardiovascular disease, and nuclear cardiology. He offers his premier cardiology services to patients at Comprehensive Internal Medicine & Cardiology Associates of Huntington in Huntington, New York.
Dr. Bergman received his Bachelor of Science from the State University of New York at Binghamton. He then went on to receive his medical degree from the University of Virginia in Charlottesville, where he also completed an internship in internal medicine.
Dr. Bergman completed a residency in internal medicine at the Hospital of the University of Pennsylvania in Philadelphia and a residency in cardiology at Montefiore Medical Center in the Bronx, New York City. Dr. Bergman is affiliated with Huntington Hospital in Huntington, New York.
To schedule with Dr. Bergman, call Comprehensive Internal Medicine & Cardiology Associates of Hungtington or use the online booking tool request an appointment.
Practice
Comprehensive Internal Medicine & Cardiology Associates of Huntington
Joshua Klein, MD, is board certified in Internal Medicine and Cardiology as well as Echocardiography and Nuclear Cardiology. He is pleased to be a part of the skilled team at Comprehensive Internal Medicine & Cardiology Associates of Huntington in Huntington, New York.
After graduating Cum Laude with a degree in Molecular and Cellular Biology from Yale University, Dr. Klein went on to receive his degree in Medicine from Albert Einstein College of Medicine.
Dr. Klein completed a residency at North Shore University Hospital in Manhasset, New York, where he also did his fellowship in Cardiovascular Medicine and earned recognition as Chief Fellow.
Dr. Klein is a fellow of the American College of Cardiology. He’s authored a major study and several abstracts, as well as done several poster presentations at major conferences.
To make an appointment with Dr. Klein, call Comprehensive Internal Medicine & Cardiology Associates of Huntington or request an appointment online today.
Practice
Comprehensive Internal Medicine & Cardiology Associates of Huntington
“The office workers have always been very nice and efficient. Dr Klein is a great doctor. He is kind, patient and always a great listener. I feel like i am heard when i go to his office”
Dr. Joshua Klein
Internist
175 East Main Street
Suite 200
Huntington, NY 11743
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