Mark Zeme, M. D.
Otolaryngology Physician · Castro Valley, CA
Mark Zeme, M. D. is an otolaryngology physician with a practice address in Castro Valley, California, and NPI 1669400388, issued on Jun 29, 2006. Check the license (California G66448, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Mark Zeme
- Credential
- M. D.
- Primary taxonomy
- Otolaryngology Physician 207Y00000X
- License number
- G66448 CA
Self-reported in NPPES; status is on the state search - Practice location
- 20400 Lake Chabot RD Ste 301, Castro Valley, CA 94546
- Phone
- (510) 889-6673
- Enumerated
- Jun 29, 2006
- Record last updated
- Mar 4, 2014 (not updated in 12 years: call before relying on the address or phone)
- Fax
- (510) 889-0913
- Medicaid ID
- 00G664480 CA
- Medicare enrollment
- Enrolled (PECOS I20091012000127); accepts Medicare assignment
- Medical or professional school
- University Of Michigan Medical School, 1987
- Entity
- Type 1 · individual
8 nearest otolaryngology physician records → All 1,212 in California → Look up another NPI →
Verify Mark Zeme in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license G66448Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
85% fewer Medicare Part D claims than the average otolaryngology physician in 2024
79 Medicare Part D claims for 43 beneficiaries, against an average of 541 among the 8,339 providers of this specialty who prescribed in Part D. Brand-name drugs were 0% of claims.
Most prescribed
- Prednisone16 claims
- Pantoprazole Sodium14 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.
The MIPS final score for 2023 (Medicare payment program): 0 of 100
The Merit-based Incentive Payment System score is reported for this clinician. Four categories are weighted into the final score; the average among 454,083 clinicians with a measured score was 83.5.
Source: CMS Quality Payment Program, MIPS performance year 2023; category weights for 2023 (qpp.cms.gov).
Mark Zeme among 1,212 otolaryngology physician records in California
Mark Zeme, M. D. is one of 1,212 otolaryngology physician records with a practice address in California. 80% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2006, is newer than 7% of them.
- NPI issued2006 · 7% of these records are older, 52% newer
- In a Medicare fileYes · 80% of these records are
- In the CMS Doctors and Clinicians fileYes · 67% of these records are
- Graduated1987 · median 2004 among the 818 with a school on file
- Record last updated2014 · 63% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207Y00000X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Otolaryngology Physician providers in California
There are 1,212 otolaryngology physician records in California.
All 1,212 in California → Every provider in Castro Valley → Otolaryngology Physician nationwide →
The 8 otolaryngology physician records with the nearest ZIP codes
- Kristin Brew, MDCastro Valley, CA 945461669568655
- Jiahui Lin, MDCastro Valley, CA 945461932595642
- Shaulnie Mohan, M.D.Castro Valley, CA 945461851529234
- Wayne Barber, MDHayward, CA 945451063590818
- Ted Kim, MDHayward, CA 945451295814994
- Matthew Lando, MDHayward, CA 945451982782744
- Keith Matsuoka, MDHayward, CA 945451538247309
- Sassan Falsafi, M.D.Lafayette, CA 945491306956362
Common questions
What is Mark Zeme, M. D.'s NPI number?
Mark Zeme, M. D.'s National Provider Identifier (NPI) is 1669400388, issued on Jun 29, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Mark Zeme, M. D. located?
The NPPES record lists a practice address at 20400 Lake Chabot RD Ste 301, Castro Valley, CA, 94546. Phone: (510) 889-6673. Providers update this record themselves, so call before visiting.
How can I verify Mark Zeme, M. D.'s license?
NPPES lists California license number G66448, as entered by the provider. Search the Medical Board of California at https://www.mbc.ca.gov/License-Verification/default.aspx. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does Mark Zeme, M. D. prescribe under Medicare Part D?
In 2024, Mark Zeme, M. D. had 79 Medicare Part D claims for 43 beneficiaries; the average among otolaryngology physician prescribers was 541. Part D covers Medicare prescriptions only.
What is Mark Zeme, M. D.'s MIPS final score?
The 2023 MIPS final score is 0 of 100. The average among 454,083 clinicians with a measured score was 83.5.
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.
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.