Michael Christopher Gynn, MD
Surgery Physician · Pleasanton, CA
Michael Christopher Gynn, MD is a surgery physician with a practice address in Pleasanton, California, and NPI 1366462491, issued on Jul 20, 2006. Check the license (California A79766, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Michael Christopher Gynn
- Credential
- MD
- Primary taxonomy
- Surgery Physician 208600000X
- License number
- A79766 CA
Self-reported in NPPES; status is on the state search - Practice location
- 5555 W Las Positas Blvd, Pleasanton, CA 94588
- Phone
- (925) 416-3440
- Enumerated
- Jul 20, 2006
- Record last updated
- Mar 12, 2025
- Entity
- Type 1 · individual
8 nearest surgery physician records → All 3,118 in California → Look up another NPI →
Also registered at 5555 W Las Positas Blvd
A shared address usually means a shared clinic or building; it does not show who employs whom.
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Verify Michael Christopher Gynn in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license A79766Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
37% fewer Medicare Part D claims than the average surgery physician in 2024
93 Medicare Part D claims for 42 beneficiaries, against an average of 147 among the 20,115 providers of this specialty who prescribed in Part D. 19 claims were for opioids.
Most prescribed
- Hydrocodone-Acetaminophen18 claims
- Ibuprofen13 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.
Industry payments in 2024: $704.65
2 payments; by number, the most common kind was travel and lodging; the largest payer was Stryker Corporation. The 17,103 providers of this specialty with any payment received $3,513.80 on average. Payments are reported by manufacturers, not by the provider, and are not a sign of wrongdoing.
Source: CMS Open Payments, program year 2024 (openpaymentsdata.cms.gov); average among providers of this specialty with at least one payment.
Michael Christopher Gynn among 3,118 surgery physician records in California
Michael Christopher Gynn, MD is one of 3,118 surgery physician records with a practice address in California. 75% 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 6% of them.
- NPI issued2006 · 6% of these records are older, 55% newer
- In a Medicare fileYes · 75% of these records are
- In the CMS Doctors and Clinicians fileNo · 61% of these records are
- Record last updated2025 · 59% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 208600000X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Surgery Physician providers in California
There are 3,118 surgery physician records in California.
All 3,118 in California → Every provider in Pleasanton → Surgery Physician nationwide →
The 8 surgery physician records with the nearest ZIP codes
- Chau Dang, MDPleasanton, CA 945881649213398
- Mark Dy-Liacco, MDPleasanton, CA 945881366488850
- Mary Estakhri, MDPleasanton, CA 945881467579763
- John Gahagan, M.D.Pleasanton, CA 945881558629493
- Carlos Gracia, MDPleasanton, CA 945881972525053
- Kevin Izquierdo, MDPleasanton, CA 945881922361641
- Samuel Liu, MDPleasanton, CA 945881790863884
- Raman Nambisan, MDPleasanton, CA 945881154358992
Common questions
What is Michael Christopher Gynn, MD's NPI number?
Michael Christopher Gynn, MD's National Provider Identifier (NPI) is 1366462491, issued on Jul 20, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Michael Christopher Gynn, MD located?
The NPPES record lists a practice address at 5555 W Las Positas Blvd, Pleasanton, CA, 94588. Phone: (925) 416-3440. Providers update this record themselves, so call before visiting.
How can I verify Michael Christopher Gynn, MD's license?
NPPES lists California license number A79766, 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 Michael Christopher Gynn, MD prescribe under Medicare Part D?
In 2024, Michael Christopher Gynn, MD had 93 Medicare Part D claims for 42 beneficiaries; the average among surgery physician prescribers was 147. 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.
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.