Provider records sourced from NPPES (CMS National Plan & Provider Enumeration System). Data current as of October 4, 2026.
NPIDirectory

Dr. Cerrah Lynn Mendelsohn-Elzam, MD

Individual provider Emergency Medicine Physician · NPI 1568679736

Dr. Cerrah Lynn Mendelsohn-Elzam, MD practises Internal Medicine in Greenwich, Connecticut. Graduated from University of California, Davis School of Medicine in 2003, 23 years ago. Practices with Glenville Medical Associates PC, a 7-clinician group and works from 2 locations. Licensed in Connecticut.

Years since qualifying
23
Trained at
University of California, Davis School of Medicine
Licensed in
CT
In the registry since
2007
Specialties on file
2
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

7 Riversville Rd Ste 1
Greenwich, CT 06831-3697
Phone: (203) 531-1808
Fax: (203) 531-8326
Show map & directions

Directions in Google Maps · Apple Maps · OpenStreetMap

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

Additional practice locations (1)

  • 5 Perryridge Road, Greenwich, CT 06830-4697 — (203) 863-3639

Specialties & licences

Internal Medicine Physician (primary) Taxonomy 207R00000X · Licence 45295 (CT)
Emergency Medicine Physician Taxonomy 207P00000X · Licence 045295 (CT)

Record details

NPI number1568679736
Entity typeIndividual (Type 1)
GenderFemale
Credentials MD
Sole proprietorYes
NPI enumeratedMay 17, 2007
Last updated in NPPESMarch 30, 2022
Certification dateMarch 30, 2022

Medicare enrollment

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

Medicare specialtyINTERNAL MEDICINE
Also practisesEMERGENCY MEDICINE
Medical schoolUNIVERSITY OF CALIFORNIA, DAVIS SCHOOL OF MEDICINE
Graduated 2003 (23 years in practice)
Group practice Glenville Medical Associates P.C — 7 clinicians
Accepts Medicare assignment Not indicated

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 patients140
Services billed 706 a service is one billed item, such as a visit, a test or a procedure
Average patient age79

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.

Payments from drug and device companies, 2025

Drug and device makers are required by federal law (the Physician Payments Sunshine Act) to report what they pay or give to clinicians, and CMS publishes the reports as Open Payments. This is the 2025 program year. A report is a record of a payment, not an allegation of anything, and many are small items such as meals. Only general payments are listed here; research payments and ownership or investment interests are reported separately by CMS and are not shown.

Food and Beverage $443 19 payments · a meal or drink at a meeting or visit, not a fee

Each amount is the sum of what companies reported for that kind of payment in 2025, rounded to the dollar. Not all of it is income to the clinician: a meal is not a fee, a charitable contribution goes to a charity, and a royalty or an acquisition payment is not a salary.

Check a report, or dispute one, at the source in CMS’s own tool, Open Payments. Corrections go through CMS’s dispute process. This site removes a home address on request and asks for no proof, because that is privacy; it will not remove an accurate payment report on request, because that is a statutory public disclosure.

Practises at

Facilities the CMS Facility Affiliation file lists for this clinician.

Colleagues at Glenville Medical Associates PC

Clinicians the CMS Doctors & Clinicians file lists under the same group practice. CMS counts 7 clinicians in the practice; 4 are shown here.

Other providers in Greenwich