Quick answers
- Where does Katherine A. Westbrook see patients?
- Medicare's clinician data lists 1 practice location in Walnut Creek, CA. Call before your visit to confirm the address.
- What is Katherine A. Westbrook's specialty?
- Medicare lists Nurse Practitioner as the primary specialty.
- Does Katherine A. Westbrook accept Medicare assignment?
- Yes. Medicare's clinician data says Katherine A. Westbrook 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 the phone number for Katherine A. Westbrook?
- (925) 941-4058, as listed in official Medicare / NPI Registry data.
- What is Katherine A. Westbrook's NPI number?
- 1215950159. 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 Katherine A. Westbrook is enrolled with Medicare (CMS data updated 2026-10-02).
- 1479 Ygnacio Valley Rd, Suite 150Walnut Creek, CA 94598 (925) 941‑4058
Group practices
Medicare enrollment lists Katherine A. Westbrook as a member of this group (CMS data updated 2026-10-02).
- John Muir Physician Network494 clinicians in the group
Specialties
- Nurse Practitionerprimary
Other nurse practitioners in Walnut Creek
Clinicians with the same Medicare primary specialty in Walnut Creek, CA — not a recommendation.
Clinician information
| Credential | NP |
|---|---|
| Graduation year | 1990 |
| Gender (as listed) | Female |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1215950159 |
| 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