Gerald Mark Sinclair, M.D.
Otolaryngology Physician · Palo Alto, CA
Gerald Mark Sinclair, M.D. is an otolaryngology physician with a practice address in Palo Alto, California, and NPI 1902160567, issued on Jun 28, 2012. Check the license (California GFE35616, as entered in NPPES) on the Medical Board of California; the federal record below is the public data PlainDoctor holds for this provider.
- Name
- Gerald Mark Sinclair
- Credential
- M.D.
- Primary taxonomy
- Otolaryngology Physician 207Y00000X
- License number
- GFE35616 CA
Self-reported in NPPES; status is on the state search - Practice location
- 1257 Martin Ave, Palo Alto, CA 94301
- Phone
- (650) 327-7574
- Enumerated
- Jun 28, 2012
- Record last updated
- Jun 28, 2012 (not updated in 14 years: call before relying on the address or phone)
- Fax
- (650) 327-7574
- Entity
- Type 1 · individual
8 nearest otolaryngology physician records → All 1,212 in California → Look up another NPI →
Verify Gerald Mark Sinclair in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license GFE35616Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
Gerald Mark Sinclair among 1,212 otolaryngology physician records in California
Gerald Mark Sinclair, 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 not. Its NPI, issued in 2012, is newer than 74% of them.
- NPI issued2012 · 74% of these records are older, 23% newer
- In a Medicare fileNo · 80% of these records are
- In the CMS Doctors and Clinicians fileNo · 67% of these records are
- Record last updated2012 · 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. No Medicare prescribing, quality score, industry payment or hospital affiliation is published for this NPI.
All 1,212 in California → Every provider in Palo Alto → Otolaryngology Physician nationwide →
The 8 otolaryngology physician records with the nearest ZIP codes
- Arman Abdalkhani, MDPalo Alto, CA 943011356536130
- Whitney Chiao, MDPalo Alto, CA 943011316500101
- Brad Hinrichs, MDPalo Alto, CA 943011841202033
- David Lieberman, M.D.Palo Alto, CA 943011750565891
- Devin Lonergan, MDPalo Alto, CA 943011609062744
- Michael McCaffrey, MDPalo Alto, CA 943011073525275
- Melinda Moir, MDPalo Alto, CA 943011740356039
- Brendan Pierce, M.D.Palo Alto, CA 943011669616306
Common questions
What is Gerald Mark Sinclair, M.D.'s NPI number?
Gerald Mark Sinclair, M.D.'s National Provider Identifier (NPI) is 1902160567, issued on Jun 28, 2012. An NPI identifies a provider in billing; it is not a license.
Where is Gerald Mark Sinclair, M.D. located?
The NPPES record lists a practice address at 1257 Martin Ave, Palo Alto, CA, 94301. Phone: (650) 327-7574. Providers update this record themselves, so call before visiting.
How can I verify Gerald Mark Sinclair, M.D.'s license?
NPPES lists California license number GFE35616, 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.
Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. 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.