Katherine A. Westbrook, N.P.
Nurse Practitioner · Walnut Creek, CA
Katherine A. Westbrook, N.P. is a nurse practitioner with a practice address in Walnut Creek, California, and NPI 1215950159, issued on Jul 25, 2006. Check the license (California NP5743, as entered in NPPES) with the California board that licenses this profession; the Medicare figures below come from public CMS files.
- Name
- Katherine A. Westbrook
- Credential
- N.P.
- Primary taxonomy
- Nurse Practitioner 363L00000X
- License number
- NP5743 CA
Self-reported in NPPES; status is on the state search - Practice location
- 1479 Ygnacio Valley RD, Walnut Creek, CA 94598
- Phone
- (925) 941-4154
- Enumerated
- Jul 25, 2006
- Record last updated
- Jul 3, 2019 (not updated in 7 years: call before relying on the address or phone)
- Medicare enrollment
- Enrolled (PECOS I20050222000464); accepts Medicare assignment
- Entity
- Type 1 · individual
8 nearest nurse practitioner records → All 8,223 in California → Look up another NPI →
Also registered at 1479 Ygnacio Valley RD
A shared address usually means a shared clinic or building; it does not show who employs whom.
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Verify Katherine A. Westbrook in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWhich California board licenses this profession
Search for license NP5743Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
The practice group's MIPS final score for 2023 (Medicare payment program): 85.7 of 100
The Merit-based Incentive Payment System score is reported for the practice group, not for one clinician alone. Four categories are weighted into the final score; the average among 454,083 clinicians with a measured score was 83.5.
Source: CMS Quality Payment Program, MIPS performance year 2023, group reporting; category weights for 2023 (qpp.cms.gov).
Bills Medicare through one group practice
- John Muir Physician NetworkWalnut Creek, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Katherine A. Westbrook among 8,223 nurse practitioner records in California
Katherine A. Westbrook, N.P. is one of 8,223 nurse practitioner records with a practice address in California. 65% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2006, is newer than 2% of them.
- NPI issued2006 · 2% of these records are older, 82% newer
- In a Medicare fileYes · 65% of these records are
- In the CMS Doctors and Clinicians fileYes · 42% of these records are
- Graduated1990 · median 2017 among the 3,425 with a school on file
- Record last updated2019 · 45% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 363L00000X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
70 nurse practitioner records list a practice address in Walnut Creek
They are 70 of the 6,170 NPPES records with a practice address in Walnut Creek, and 8,223 nurse practitioner records in California.
All 8,223 in California → Every provider in Walnut Creek → Nurse Practitioner nationwide →
The 8 nurse practitioner records with the nearest ZIP codes
- Sarah Berg, NPWalnut Creek, CA 945981427062975
- Emily Brama, RN, MSN, FNP, NP-CWalnut Creek, CA 945981952696684
- Sarah Buenviaje, M.S.N., O.N.P.Walnut Creek, CA 945981588716971
- Kathleen Fitterer, N.P.Walnut Creek, CA 945981649439126
- Allison Hanson, NPWalnut Creek, CA 945981376537589
- Amy Inouye, NPWalnut Creek, CA 945981780740332
- Olga Izmaylova, NPWalnut Creek, CA 945981568647543
- Leah Juhle, MSN, NP-CWalnut Creek, CA 945981255570750
Common questions
What is Katherine A. Westbrook, N.P.'s NPI number?
Katherine A. Westbrook, N.P.'s National Provider Identifier (NPI) is 1215950159, issued on Jul 25, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Katherine A. Westbrook, N.P. located?
The NPPES record lists a practice address at 1479 Ygnacio Valley RD, Walnut Creek, CA, 94598. Phone: (925) 941-4154. Providers update this record themselves, so call before visiting.
How can I verify Katherine A. Westbrook, N.P.'s license?
NPPES lists California license number NP5743, as entered by the provider. Search the California board that licenses this profession; the NPPES record confirms identity only.
What is Katherine A. Westbrook, N.P.'s MIPS final score?
The 2023 MIPS final score is 85.7 of 100, reported for the practice group. The average among 454,083 clinicians with a measured score was 83.5.
Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. Medicare files from data.cms.gov. An NPI identifies who bills; it is not a license.
Figures on PlainDoctor are read from the federal files each page names (CMS NPPES, Medicare Part D, MIPS, Open Payments; the HHS-OIG exclusion list only as counts) and from Census population estimates, with the file date shown beside them. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 9, 2026.