Quick answers
- Where does Michael T. Nwynn see patients?
- Medicare's clinician data lists 2 practice locations, including San Mateo, CA. Call before your visit to confirm the address.
- What is Michael T. Nwynn's specialty?
- Medicare lists Obstetrics/Gynecology as the primary specialty, and also Urology.
- Does Michael T. Nwynn accept Medicare assignment?
- Yes. Medicare's clinician data says Michael T. Nwynn accepts Medicare assignment (the Medicare-approved amount as full payment for covered services), as of 2026-10-02. Ask the office to confirm before your visit.
- What is Michael T. Nwynn's NPI number?
- 1629157367. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Practice locations
Addresses where Michael T. Nwynn is enrolled with Medicare (CMS data updated 2026-10-02).
- 22 W 39th Ave, Hos316msSan Mateo, CA 94403
- 222 W 39th AveSan Mateo, CA 94403
Group practices
Medicare enrollment lists Michael T. Nwynn as a member of this group (CMS data updated 2026-10-02).
- County of San Mateo310 clinicians in the group
Specialties
- Obstetrics/Gynecologyprimary
- Urologyalso
Other OB-GYNs in San Mateo
Clinicians with the same Medicare primary specialty in San Mateo, CA — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Medical school | University Of California, Geffen School Of Medicine |
| Graduation year | 1989 |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1629157367 |
| Corrections | Report an error or suggest an update → |
Most corrections must be made at the source: clinicians update their NPI Registry record (NPPES) and their Medicare enrollment (PECOS); this page follows the next data release.
Sources
- National Downloadable File (Doctors and Clinicians) — CMS, data updated 2026-10-02, retrieved 2026-10-29
- NPI Registry — U.S. Department of Health and Human Services (NPPES), the clinician’s official record
- Medicare Care Compare — official Medicare tool to look up clinicians