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

Dr. Marc Mendelsohn, MD

Individual provider Emergency Medicine Physician · NPI 1699110379

Dr. Marc Mendelsohn, MD practises Emergency Medicine in Saint Louis, Missouri. Qualified in 2013, 13 years ago. Practices with Washington University, a 2,986-clinician group and accepts Medicare assignment. Licensed in Connecticut and Missouri.

Years since qualifying
13
Licensed in
CT, MO
In the registry since
2013
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 →

Claim this listing Report a problem Suggest an edit

Practice location Address checks out

400 S Kingshighway Blvd Dept Emergency Med
Saint Louis, MO 63110-1014
Phone: (314) 362-9123
Fax: (314) 747-3338
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

Emergency Medicine Physician (primary) Taxonomy 207P00000X · Licence 2019018127 (MO)
Emergency Medicine Physician Taxonomy 207P00000X · Licence 1.084417 (CT)
General Practice Physician Taxonomy 208D00000X · Licence 2019018127 (MO)

Record details

NPI number1699110379
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorNo
NPI enumeratedMay 8, 2013
Last updated in NPPESApril 21, 2026
Certification dateApril 21, 2026

Medicare enrollment

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

Medicare specialtyEMERGENCY MEDICINE
Also practisesGENERAL PRACTICE
Medical schoolOTHER
Graduated 2013 (13 years in practice)
Group practice Washington University — 2986 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 patients174
Services billed 242 a service is one billed item, such as a visit, a test or a procedure
Average patient age67

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.

Colleagues at Washington University

Clinicians the CMS Doctors & Clinicians file lists under the same group practice. CMS counts 2986 clinicians in the practice; 12 are shown here.

Other providers in Saint Louis