Quick answers
- Where does Madeline Johnson see patients?
- Medicare's clinician data lists 2 practice locations, including San Mateo, CA and Monterey, CA. Call before your visit to confirm the address.
- What is Madeline Johnson's specialty?
- Medicare lists Physician Assistant as the primary specialty.
- Does Madeline Johnson accept Medicare assignment?
- Medicare's clinician data says Madeline Johnson may accept Medicare assignment (as of 2026-10-02). Ask the office whether they accept it for your visit.
- What is Madeline Johnson's NPI number?
- 1124945191. 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 Madeline Johnson is enrolled with Medicare (CMS data updated 2026-10-02).
- 136 N San Mateo DrSan Mateo, CA 94401
- 543 Ramona Ave, Apt CMonterey, CA 93940
Specialties
- Physician Assistantprimary
Other physician assistants in San Mateo
Clinicians with the same Medicare primary specialty in San Mateo, CA — not a recommendation.
Clinician information
| Credential | PA |
|---|---|
| Graduation year | 2026 |
| Gender (as listed) | Female |
| Medicare assignment | May accept for some services |
| NPI (National Provider Identifier) | 1124945191 |
| 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