Provider records sourced from NPPES (CMS National Plan & Provider Enumeration System). Data current as of August 10, 2026.

Dr. Jonathan Saul Lown, MD

Individual provider Sleep Medicine (Internal Medicine) Physician · NPI 1265538458

Dr. Jonathan Saul Lown, MD is an Internal Medicine in Commack, New York. Graduated from State University of New York Downstate Medical Center in 1995, 31 years ago. Practices as a sole proprietor, accepts Medicare assignment and offers telehealth. Licensed in New York.

Years since qualifying
31
Trained at
State University of New York Downstate Medical Center
Licensed in
NY
In the registry since
2006
Specialties on file
3
What do these letters mean?
MD — Doctor of Medicine
A physician who completed allopathic medical school.

See every abbreviation used in this directory →

Practice location Address checks out

2171 Jericho Tpke Ste 100
Commack, NY 11725-2937
Phone: (631) 343-7242
Fax: (631) 343-7245
Show map & directions

Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Internal Medicine Physician (primary) Taxonomy 207R00000X · Licence 204673-1 (NY)
Sleep Medicine (Internal Medicine) Physician Taxonomy 207RS0012X · Licence 204673 (NY)
Durable Medical Equipment & Medical Supplies Taxonomy 332B00000X · Licence 204673 (NY)

Record details

NPI number1265538458
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorYes
NPI enumeratedSeptember 15, 2006
Last updated in NPPESFebruary 3, 2020
Certification dateFebruary 3, 2020

Medicare enrollment

From the CMS Doctors & Clinicians file — this clinician is enrolled in Medicare.

Medicare specialtyINTERNAL MEDICINE
Medical schoolSTATE UNIVERSITY OF NEW YORK DOWNSTATE MEDICAL CENTER
Graduated 1995 (31 years in practice)
Accepts Medicare assignment Yes — accepts the Medicare-approved amount
TelehealthOffers telehealth services