NPPES file of Aug 9, 2026

Mark Christopher Zemanek, DO

Physician Nutrition Specialist (Internal Medicine) · Cleveland, OH

Mark Christopher Zemanek, DO is a physician nutrition specialist (internal medicine) with a practice address in Cleveland, Ohio, and NPI 1154065886, issued on Apr 27, 2022. Check the license (Ohio 34.018274, as entered in NPPES) on the State Medical Board of Ohio; the Medicare figures below come from public CMS files.

Record from CMS NPPES, file of Aug 9, 2026 · Medicare files 2024 · method · Verify with CMS →

NPPES recordNPPES file of Aug 9, 2026
1154065886
Name
Mark Christopher Zemanek
Credential
DO
Primary taxonomy
Physician Nutrition Specialist (Internal Medicine) 207RP1002X
License number
34.018274 OH
Self-reported in NPPES; status is on the state search
Practice location
2049 E 100TH St, Cleveland, OH 44106
Phone
(216) 444-2200
Enumerated
Apr 27, 2022
Record last updated
Jan 8, 2026
Medicare enrollment
Enrolled (PECOS I20260115003438); accepts Medicare assignment
Medical or professional school
Ohio University, College Of Osteopathic Medicine, 2022
Entity
Type 1 · individual
Public record from CMS NPPES (open it on the CMS NPI Registry). Enrollment, assignment, school and telehealth: CMS Doctors and Clinicians file, Aug 2026. A record is not a license: verify it with the state board.
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1 nearest physician nutrition specialist (internal medicine) record → All 2 in Ohio → Look up another NPI →

Also registered at 2049 E 100TH St

A shared address usually means a shared clinic or building; it does not show who employs whom.

  1. Sonnet Aguirre, RDN, PA-CPhysician Assistant1184915720
  2. Dennis Alekseyenko, PA-CPhysician Assistant1851046924
  3. Cheyanne Allan, AU.D.Audiologist1962243865
  4. Maria Bonvissuto, AUDAudiologist1467116780
  5. Alfred Davis, PA-CPhysician Assistant1326367970
  6. Tiffany Deflorville, NP-CFamily Nurse Practitioner1740820497

Verify Mark Christopher Zemanek in five checks

  1. 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
  2. 2LicenseActive license and public ordersState Medical Board of Ohio
    Search for license 34.018274    Check the board
  3. 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
  4. 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
  5. 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
Open the Ohio license search

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9% more Medicare Part D claims than the average physician nutrition specialist (internal medicine) in 2024

326 Medicare Part D claims for 93 beneficiaries, against an average of 298 among the 5 providers of this specialty who prescribed in Part D.

  1. Mark Zemanek326
  2. Specialty average298

Most prescribed

  1. Atorvastatin Calcium23 claims
  2. Amlodipine Besylate18 claims
  3. Losartan Potassium16 claims
  4. Metformin Hcl16 claims
  5. Prednisone13 claims
  6. Gabapentin11 claims

Source: CMS Medicare Part D Prescribers by Provider and Drug, 2024 (data.cms.gov). Part D covers prescriptions for Medicare patients only; drugs with fewer than 11 claims are not published.

One hospital affiliation

  1. Cleveland ClinicCleveland, OH · Acute Care Hospitals4 of 5 stars

Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through); hospitals matched to CMS Hospital General Information (Care Compare) (data.cms.gov). Star ratings are CMS hospital ratings, not ratings of this provider.

Physician Nutrition Specialist (Internal Medicine) providers in Ohio

There are 2 physician nutrition specialist (internal medicine) records in Ohio.

All 2 in Ohio → Every provider in Cleveland → Physician Nutrition Specialist (Internal Medicine) nationwide →

The 1 physician nutrition specialist (internal medicine) record with the nearest ZIP codes

  1. Jessica SosioCleveland, OH 441951962085373

Common questions

What is Mark Christopher Zemanek, DO's NPI number?

Mark Christopher Zemanek, DO's National Provider Identifier (NPI) is 1154065886, issued on Apr 27, 2022. An NPI identifies a provider in billing; it is not a license.

Where is Mark Christopher Zemanek, DO located?

The NPPES record lists a practice address at 2049 E 100TH St, Cleveland, OH, 44106. Phone: (216) 444-2200. Providers update this record themselves, so call before visiting.

How can I verify Mark Christopher Zemanek, DO's license?

NPPES lists Ohio license number 34.018274, as entered by the provider. Search the State Medical Board of Ohio at https://elicense.ohio.gov/oh_verifylicense. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.

How much does Mark Christopher Zemanek, DO prescribe under Medicare Part D?

In 2024, Mark Christopher Zemanek, DO had 326 Medicare Part D claims for 93 beneficiaries; the average among physician nutrition specialist (internal medicine) prescribers was 298. Part D covers Medicare prescriptions only.

Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. Medicare files from data.cms.gov. An NPI identifies who bills; it is not a license.

Written with AI tools from the named public files; every figure is computed from those files (how it is made).

Figures on PlainDoctor are read from the federal files each page names (CMS NPPES, Medicare Part D, MIPS, Open Payments; the HHS-OIG exclusion list only as counts) and from Census population estimates, with the file date shown beside them. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 9, 2026.