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

Dr. Jonathan Scott Mendelson, MD

Individual provider Internal Medicine Physician · NPI 1134418908

Dr. Jonathan Scott Mendelson, MD is registered under Critical Care (Intensivists) in New York, New York. Graduated from George Washington University School of Medicine in 2011, 15 years ago. Practices with Hartford Healthcare Medical Group Specialists PLLC, a 1,537-clinician group and accepts Medicare assignment. Licensed in Connecticut, Maine and New York.

Years since qualifying
15
Trained at
George Washington University School of Medicine
Licensed in
CT, ME, NY
In the registry since
2011
Specialties on file
6
What do these letters mean?
MD — Doctor of Medicine
A physician who completed allopathic medical school.

See every abbreviation used in this directory →

Claim this listing Report a problem Suggest an edit

Practice location Address checks out

550 1st Ave
New York, NY 10016-6402
Phone: (212) 263-5506
Show map & directions

Directions in Google Maps · Apple Maps · OpenStreetMap

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

Specialties & licences

Pulmonary Disease Physician (primary) Taxonomy 207RP1001X · Licence 63488 (CT)
Internal Medicine Physician Taxonomy 207R00000X · Licence MD21404 (ME)
Internal Medicine Physician Taxonomy 207R00000X · Licence 273595 (NY)
Pulmonary Disease Physician Taxonomy 207RP1001X · Licence MD21404 (ME)
Student in an Organized Health Care Education/Training Program Taxonomy 390200000X
Pulmonary Disease Physician Taxonomy 207RP1001X · Licence 273595 (NY)

Record details

NPI number1134418908
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorNo
NPI enumeratedApril 1, 2011
Last updated in NPPESOctober 7, 2020
Certification dateOctober 7, 2020

Medicare enrollment

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

Medicare specialtyCRITICAL CARE (INTENSIVISTS)
Medical schoolGEORGE WASHINGTON UNIVERSITY SCHOOL OF MEDICINE
Graduated 2011 (15 years in practice)
Group practice Hartford Healthcare Medical Group Specialists Pllc — 1537 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount

Medicare patients and services, 2024

From the CMS Medicare Physician & Other Practitioners file for calendar year 2024. It counts Original Medicare patients only, so a practice that mostly sees Medicare Advantage or privately insured patients looks smaller here than it is.

Medicare patients108
Services billed 216 a service is one billed item, such as a visit, a test or a procedure
Average patient age75

Dollar amounts are not shown. What Medicare pays a practice is gross billings, before staff, premises and tax and including the cost of any drugs it administers, so it is not what a clinician earns.

Practises at

Facilities the CMS Facility Affiliation file lists for this clinician. Those with a page here are linked.

Colleagues at Hartford Healthcare Medical Group Specialists PLLC

Clinicians the CMS Doctors & Clinicians file lists under the same group practice. CMS counts 1537 clinicians in the practice; 12 are shown here.

Other providers in New York