Katherine A. Westbrook, N.P.
NPI 1215950159ActiveIndividual· Nurse Practitioner· Walnut Creek, CA
Nurse Practitioner (N.P.) with John Muir Physician Network, practicing in Walnut Creek, California. Medicare paid $26,639 for services to 159 patients in 2024. Janssen Scientific Affairs, LLC was the largest of 2 companies reporting payments in 2025, $155.56 in all, mostly food and beverage.
Overview
| NPI | 1215950159 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | N.P. |
| Sole proprietor | No |
| NPI issued | Jul 25, 2006 |
| Last updated in NPPES | Jul 3, 2019 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Nurse Practitioner Primary | 363L00000X | NP5743 | CA |
Exclusion screening
| List | Result | Details |
|---|---|---|
| HHS-OIG LEIE · Nov 10, 2026 | No match | Checked by NPI and by name + state |
| North Carolina Medicaid · Nov 11, 2026 | No match | — |
| New York OMIG · Nov 11, 2026 | No match | — |
| Ohio Medicaid · Nov 11, 2026 | No match | — |
| Pennsylvania Medicheck · Nov 11, 2026 | No match | — |
| Washington HCA · Nov 11, 2026 | No match | — |
Official OIG search · How matching works ·Bulk check a roster
Medicare
| Enrollment (PECOS) | Enrolled Practitioner - Nurse Practitioner (CA) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 159 |
|---|---|
| Services billed | 273 across 6 procedure codes |
| Paid by Medicare | $26,639 |
Education and affiliations
| Graduation year | 1990 |
|---|---|
| Medicare specialty | Nurse Practitioner |
Medical group
- John Muir Physician NetworkPleasant Hill, CA · 494 clinicians
Industry payments (Open Payments)
- 2025$155.56 · 2 payments from 2 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Janssen Scientific Affairs, LLC | $134.87 | 1 |
| Janssen Biotech, Inc. | $20.69 | 1 |
What the 2025 payments were for
- Food and Beverage$155.56 · 2 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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All 74 nurse practitioners in Walnut Creek · All nurse practitioners in California