Quick answers
- Where does Alexander R. Markes see patients?
- Medicare's clinician data lists 3 practice locations, including San Mateo, CA, Valencia, CA and San Francisco, CA. Call before your visit to confirm the address.
- What is Alexander R. Markes's specialty?
- Medicare lists Orthopedic Surgery as the primary specialty.
- Does Alexander R. Markes accept Medicare assignment?
- Medicare's clinician data says Alexander R. Markes may accept Medicare assignment (as of 2026-10-02). Ask the office whether they accept it for your visit.
- What is Alexander R. Markes's NPI number?
- 1164059523. 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 Alexander R. Markes is enrolled with Medicare (CMS data updated 2026-10-02).
- 2001 Winward Way, Suite 101San Mateo, CA 94404
- 23376 Camford PlValencia, CA 91354
- 3838 California St, Rm 715San Francisco, CA 94118
Specialties
- Orthopedic Surgeryprimary
Other orthopedic surgeons 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, San Francisco School Of Medicine |
| Graduation year | 2020 |
| Gender (as listed) | Male |
| Medicare assignment | May accept for some services |
| NPI (National Provider Identifier) | 1164059523 |
| 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