Provider records sourced from NPPES (CMS National Plan & Provider Enumeration System). Data current as of August 10, 2026.
NPIDirectory

Katherine A Westbrook, NP

Individual provider Nurse Practitioner · NPI 1215950159

Katherine A Westbrook, NP is a Nurse Practitioner in Walnut Creek, California. Qualified in 1990, 36 years ago. Practices with John Muir Physician Network, a 486-clinician group, works from 3 locations and accepts Medicare assignment. Licensed in California.

Years since qualifying
36
Licensed in
CA
In the registry since
2006
What do these letters mean?
NP — Nurse Practitioner
An advanced practice nurse who can diagnose, treat and in most states prescribe.

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Practice location Address checks out

1479 Ygnacio Valley Rd
Walnut Creek, CA 94598
Phone: (925) 941-4154
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Additional practice locations (2)

  • 1656 N California Blvd, Walnut Creek, CA 94596-4180 — (925) 941-4154
  • 1656 N California Blvd, Walnut Creek, CA 94596-4180 — (925) 941-4154

Specialties & licences

Nurse Practitioner (primary) Taxonomy 363L00000X · Licence NP5743 (CA)

Record details

NPI number1215950159
Entity typeIndividual (Type 1)
GenderFemale
Credentials NP
Sole proprietorNo
NPI enumeratedJuly 25, 2006
Last updated in NPPESJuly 3, 2019

Medicare enrollment

From the CMS Doctors & Clinicians file — this clinician is enrolled in Medicare.

Medicare specialtyNURSE PRACTITIONER
Medical schoolOTHER
Graduated 1990 (36 years in practice)
Group practice John Muir Physician Network — 486 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount

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