Jonathan S. Lown, MD

Internal Medicine
2171 Jericho Turnpike Suite 100
Commack, NY 11725 Get Directions
Jonathan S. Lown, MD
More information available

Annual Membership Fee

495.00 every 3 months *
990.00 every 6 months *
1,980.00 each year *
*The lab portion of the annual MDVIP Wellness Program will be billed to patients directly by the lab company at the discounted rate of $70.

My Philosophy and Approach to Wellness...

As an Internist, I have developed a deep understanding of wellness and long-term healthcare. My approach focuses on helping patients live better and longer lives through both acute and preventive care. I give every patient personal advice and support in a relaxed and unrushed manner. I utilize the latest advancements in medicine and knowledge of the latest discoveries in medical research and wellness screenings to help identify risk for disease and prevent it or treat it early. It is also important to me to foster and promote optimism and good humor, which are also important elements in the healing process and staying well. 

I focus on primary care, internal medicine, cardiovascular health, preventive medicine and women’s health. In addition, I am board certified in sleep medicine and am able to treat sleep-related illnesses, such as obstructive sleep apnea and insomnia while providing guidance on CPAP management. By promoting physical and mental well-being and coaching healthier lifestyle choices, I help empower my patients to live the best life possible. I also offer conveniences, like same- or next-day appointments that start on time, which may be found in concierge medicine practices. 

My private primary care practice currently serves all of Long Island, New York. My office is conveniently located in Commack, which is easily accessible from Eastern Nassau County and Western Suffolk County. I am affiliated with St. Catherine of Siena Medical Center in Smithtown, New York. I speak fluent English and Spanish.

Dr. Lown's Credentials

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Columbia Presbyterian Medical Center
New York, NY

Columbia Presbyterian Medical Center
New York, NY

Medical School:
State University of New York - Downstate
Downstate, NY
Doctorate of Medicine 1995
Magna Cum Laude

State University of New York - Plattsburgh
Plattsburgh, NY
Bachelor of Science, Biology 1987

Diplomate in Internal Medicine, American Board of Internal Medicine 1998-present
Diplomate in Sleep Medicine, American Board of Internal Medicine 2009-present
Diplomate of Clinical Lipidology, American Board of Clinical Lipidology 2006-present
St. Catherine of Siena
Alpha Omega Alpha, Medical Honor Society
Professor/Clinical Preceptor, Stonybrook University Medical School 1995-present
Sasak, V., Lown, J., Colburn, K., Human Small Intestinal Apolopoprotein B-48 Oligaosaccharide Chains, Biochemical Journal 1991
High-affinity NGF binding requires co-expression of the trk prto-oncogene and the low Affinity NFG receptor, Nature 1991 (Acknowledgment)
American Academy of Sleep Medicine
American College of Physicians
American College of Chest Physicians
National Lipid Association
Suffolk County Medical Society
New York

Testimonials from patients of Dr. Lown

from Maxine in NY December 15, 2020 for Jonathan S. Lown, MD

Dr. Lown never fails my husband or myself. We have been with him for 17 years. Besides being brilliant, he is compassionate. He is a doctor that take the time to understand our needs. Understands the patient. No matter what we have been thru, he is always at the end of the phone explaining what to do. Besides the fact that life is so more difficult, I do feel better that Dr. Lown is the doctor… See more

from Greg in NY March 5, 2018 for Jonathan S. Lown, MD
User submitted photo

As a health insurance broker, I hear clients tell me all the time that their doctor is the best! Well Im convinced that Dr. Lown really is the best! Ive been under his care for quite some time, and am convinced that Im getting healthier as I get older!

from Betty in NY March 5, 2018 for Jonathan S. Lown, MD

Words cannot discribe what I feel of you as my physician.
You are always there for us no matter what day it is? What time it is.
I trust you completely.
Your knowledge of medicine is unbelievable and I am honored to have you as my doctor.

from Kathleen in NY March 2, 2018 for Jonathan S. Lown, MD
User submitted photo

I was a patient of Dr. Lown when during an emergency visit to the hospital I received a cat scan. Dr. Lown noticed a spot unrelated to the problem I had and said I needed it to be checked out. It was pancreatic cancer which was caught in time. That was 6 years ago. I am cancer free and a pancreatic cancer survivor thanks to Dr. Lown.

from Janice in NY March 1, 2018 for Jonathan S. Lown, MD

If you are fortunate enough to be Dr Lown,s patient you already know what a wonderful doctor he is. He went above and beyond to provide support for our daughter that passed away from Cancer this past year. He always took our calls, worked with her Cancer team and was there for support when we needed him.
Janice & John K.

from Rhea in NY March 1, 2018 for Jonathan S. Lown, MD
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Dr. Johnathan Lown took over my healthcare needs in the MDVIP plan. He has always been responsive to my concerns, and has made himself available both in and outside of Office Hours. No question of mine is ignored. He will bring up charts and information on the internet to help explain the issue for me. Finally, a Dr. who also cared enough to thoroughly investigate my sleep needs.… See more

from Steve in NY March 1, 2018 for Jonathan S. Lown, MD

Dr Lown is very thorough. However when I was recently hospitalized for nearly 3 months I never received a call or a visit from him. Although he did text with my wife I was disappointed that he never saw me.

from Larry and Alyce in NY February 28, 2018 for Jonathan S. Lown, MD
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Dr. Lown has treated my family for many years. We consider him a friend as well as our physician. He has a wonderful personality and humor. He takes every health complaint seriously and thoroughly explains his treatment plan. He is one of the most intelligent men we know and are so happy that he is our doctor.