Quick answers
- Which hospitals does Spencer J. Knapp work at?
- Medicare's official clinician data lists Spencer J. Knapp at 1 hospital: Stanford Health Care Tri-Valley. This is where the clinician works or has privileges; call the hospital to confirm.
- Where does Spencer J. Knapp see patients?
- Medicare's clinician data lists 14 practice locations, including Livermore, CA, San Bruno, CA and San Francisco, CA. Call before your visit to confirm the address.
- What is Spencer J. Knapp's specialty?
- Medicare lists Physician Assistant as the primary specialty.
- Does Spencer J. Knapp accept Medicare assignment?
- Yes. Medicare's clinician data says Spencer J. Knapp 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.
- Does Spencer J. Knapp offer telehealth?
- Medicare's clinician data says Spencer J. Knapp offers telehealth services. Ask the office which visits can be done by video or phone.
- What is the phone number for Spencer J. Knapp?
- (925) 373-4018, as listed in official Medicare / NPI Registry data.
- What is Spencer J. Knapp's NPI number?
- 1255842639. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Hospitals where Spencer J. Knapp works
Medicare's Facility Affiliation Data lists Spencer J. Knapp at these hospitals (updated 2026-10-02). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians.
- Stanford Health Care Tri-ValleyPleasanton, CA · Acute Care Hospital · CCN 050283
Practice locations
Addresses where Spencer J. Knapp is enrolled with Medicare (CMS data updated 2026-10-02). The first 5 of 14; the Medicare profile lists all.
- 1111 E Stanley BlvdLivermore, CA 94550 (925) 373‑4018
- 1133 E Stanley BlvdLivermore, CA 94550 (925) 373‑4500
- 1310 El Camino Real, Suite I JSan Bruno, CA 94066 (650) 270‑2395
- 170 Columbus Ave, Suite 110San Francisco, CA 94133 (415) 965‑8050
- 199 W Portal AveSan Francisco, CA 94127 (415) 821‑8798
Group practices
Medicare enrollment lists Spencer J. Knapp as a member of these groups (CMS data updated 2026-10-02).
- UCSF Health Medical Foundation66 clinicians in the group
- Pleasanton Emergency Medical Group38 clinicians in the group
Specialties
- Physician Assistantprimary
Other physician assistants in Livermore
Clinicians with the same Medicare primary specialty in Livermore, CA — not a recommendation.
Clinician information
| Credential | PA |
|---|---|
| Graduation year | 2017 |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| Telehealth | Offers telehealth services |
| NPI (National Provider Identifier) | 1255842639 |
| 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
- Facility Affiliation Data — Centers for Medicare & Medicaid Services (CMS), data updated 2026-10-02, retrieved 2026-10-29
- 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