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

Mark Zahniser, MD

Individual provider Critical Care Medicine (Anesthesiology) Physician · NPI 1396738548

Mark Zahniser, MD practises Anesthesiology in Cleveland, Ohio. Qualified in 1990, 36 years ago. Practices with Hospitalist Medicine Physicians of Washington - Tcs, a 208-clinician group and accepts Medicare assignment. Licensed in Ohio.

Years since qualifying
36
Licensed in
OH
In the registry since
2005
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

11100 Euclid Ave
Cleveland, OH 44106 Not confirmed with CMS for 16 years — call before visiting
Phone: (216) 844-7330
Fax: (216) 844-3781
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

Critical Care Medicine (Anesthesiology) Physician (primary) Taxonomy 207LC0200X · Licence 35066970 (OH)
Anesthesiology Physician Taxonomy 207L00000X · Licence 35066970 (OH)
Addiction Medicine (Anesthesiology) Physician Taxonomy 207LA0401X · Licence 35066970 (OH)
Hospice and Palliative Medicine (Anesthesiology) Physician Taxonomy 207LH0002X · Licence 35066970 (OH)
Pain Medicine (Anesthesiology) Physician Taxonomy 207LP2900X · Licence 35066970 (OH)
Pediatric Anesthesiology Physician Taxonomy 207LP3000X · Licence 35066970 (OH)

Record details

NPI number1396738548
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorNo
NPI enumeratedAugust 23, 2005
Last updated in NPPESAugust 19, 2010

Medicare enrollment

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

Medicare specialtyANESTHESIOLOGY
Medical schoolOTHER
Graduated 1990 (36 years in practice)
Group practice Hospitalist Medicine Physicians Of Washington - Tcs — 208 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 patients73
Services billed 137 a service is one billed item, such as a visit, a test or a procedure
Average patient age69

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 Hospitalist Medicine Physicians of Washington - Tcs

Clinicians the CMS Doctors & Clinicians file lists under the same group practice. CMS counts 208 clinicians in the practice; 12 are shown here.

Other providers in Cleveland