Michael Lee Wynn, MD
Surgery Physician · San Ramon, CA
Michael Lee Wynn, MD is a surgery physician with a practice address in San Ramon, California, and NPI 1285673996, issued on Jun 6, 2006. Check the license (California 006398000, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Michael Lee Wynn
- Credential
- MD
- Primary taxonomy
- Surgery Physician 208600000X
- License number
- 006398000 CA
Self-reported in NPPES; status is on the state search - Practice location
- 5601 Norris Canyon RD, San Ramon, CA 94583
- Phone
- (925) 277-1055
- Enumerated
- Jun 6, 2006
- Record last updated
- Jun 3, 2020 (not updated in 6 years: call before relying on the address or phone)
- Fax
- (925) 277-1915
- Medicare enrollment
- Enrolled (PECOS I20080429000443); accepts Medicare assignment
- Medical or professional school
- Irvine California College Of Medicine, 1978
- Entity
- Type 1 · individual
8 nearest surgery physician records → All 3,118 in California → Look up another NPI →
Also registered at 5601 Norris Canyon RD
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Lauren Alexander, RN, MSN, ANP-BCGeneral Practice Registered Nurse1689866998
- Richard Ash, MDPediatrics Physician1366445298
- Tsuling Chang, M.D.Dermatology Physician1154495240
- Sandy Chhiv, FNPFamily Nurse Practitioner1487102794
- Bradford Flagg, M.D.Family Medicine Physician1346323086
- Jayaram Hariharan, M.D.Family Medicine Physician1790004638
Verify Michael Lee Wynn in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license 006398000Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
50% fewer Medicare Part D claims than the average surgery physician in 2024
74 Medicare Part D claims for 50 beneficiaries, against an average of 147 among the 20,115 providers of this specialty who prescribed in Part D. 46 claims were for opioids.
Most prescribed
- Tramadol Hcl39 claims
- Tamoxifen Citrate14 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.
Bills Medicare through one group practice
- Sutter Bay Medical FoundationSan Rafael, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Michael Lee Wynn among 3,118 surgery physician records in California
Michael Lee Wynn, 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 fileYes · 61% of these records are
- Graduated1978 · median 2003 among the 1,901 with a school on file
- Record last updated2020 · 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 San Ramon → Surgery Physician nationwide →
The 8 surgery physician records with the nearest ZIP codes
- Ron Cooper, M.D.San Ramon, CA 945831407941933
- Barry Gardiner, M.D.San Ramon, CA 945831619068533
- William Hamstra, D.O.San Ramon, CA 945831306835723
- Aileen Murphy, D.O.San Ramon, CA 945831053616482
- Jing Zhou, M.D.San Ramon, CA 945831760703078
- James Bryant, MDSan Leandro, CA 945781750454708
- Garfield Bryant, M.D.San Leandro, CA 945781952402109
- Chau Dang, MDPleasanton, CA 945881649213398
Common questions
What is Michael Lee Wynn, MD's NPI number?
Michael Lee Wynn, MD's National Provider Identifier (NPI) is 1285673996, issued on Jun 6, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Michael Lee Wynn, MD located?
The NPPES record lists a practice address at 5601 Norris Canyon RD, San Ramon, CA, 94583. Phone: (925) 277-1055. Providers update this record themselves, so call before visiting.
How can I verify Michael Lee Wynn, MD's license?
NPPES lists California license number 006398000, 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 Lee Wynn, MD prescribe under Medicare Part D?
In 2024, Michael Lee Wynn, MD had 74 Medicare Part D claims for 50 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.