Quick answers
- Where does Eileen Hahn see patients?
- Medicare's clinician data lists 2 practice locations, including Walnut Creek, CA. Call before your visit to confirm the address.
- What is Eileen Hahn's specialty?
- Medicare lists Physician Assistant as the primary specialty.
- Does Eileen Hahn accept Medicare assignment?
- Medicare's clinician data says Eileen Hahn may accept Medicare assignment (as of 2026-10-02). Ask the office whether they accept it for your visit.
- What is Eileen Hahn's NPI number?
- 1861370264. 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 Eileen Hahn is enrolled with Medicare (CMS data updated 2026-10-02).
- 1399 Ygnacio Valley Rd, Suite 11dWalnut Creek, CA 94598
- 2637 Shadelands DrWalnut Creek, CA 94598
Specialties
- Physician Assistantprimary
Other physician assistants in Walnut Creek
Clinicians with the same Medicare primary specialty in Walnut Creek, CA — not a recommendation.
Clinician information
| Credential | PA |
|---|---|
| Medical school | Philadelphia College Of Osteopathic Medicine |
| Graduation year | 2025 |
| Gender (as listed) | Female |
| Medicare assignment | May accept for some services |
| NPI (National Provider Identifier) | 1861370264 |
| 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