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

Mark E Mayer, MD

Individual provider Internal Medicine Physician · NPI 1851329213

Mark E Mayer, MD practises Internal Medicine in Cleveland, Ohio. Qualified in 1982, 44 years ago. Practices with Cleveland Clinic, a 6,935-clinician group, accepts Medicare assignment and offers telehealth. Licensed in Ohio.

Years since qualifying
44
Licensed in
OH
In the registry since
2006
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

9500 Euclid Ave
Cleveland, OH 44195-0001 Not confirmed with CMS for 19 years — call before visiting
Phone: (800) 223-2273
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

Internal Medicine Physician (primary) Taxonomy 207R00000X · Licence 35061773M (OH)

Record details

NPI number1851329213
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorNo
NPI enumeratedJune 28, 2006
Last updated in NPPESJuly 8, 2007

Medicare enrollment

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

Medicare specialtyINTERNAL MEDICINE
Medical schoolOTHER
Graduated 1982 (44 years in practice)
Group practice Cleveland Clinic — 6935 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount
TelehealthOffers telehealth services
Practice locations5 on file with Medicare

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 patients83
Services billed 102 a service is one billed item, such as a visit, a test or a procedure
Average patient age72

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 Cleveland Clinic

Clinicians the CMS Doctors & Clinicians file lists under the same group practice. CMS counts 6935 clinicians in the practice; 12 are shown here.

Other providers in Cleveland