Sarah Buenviaje, M.S.N., O.N.P.
NPI 1588716971ActiveIndividual· Nurse Practitioner· Walnut Creek, CA
Nurse Practitioner (M.S.N., O.N.P.) with John Muir Physician Network, practicing in Walnut Creek, California. Their prescriptions cost Medicare Part D more than their services did: $7,338,855 for 1,811 claims, against $73,208 paid for services in 2024. Pfizer Inc. was the largest of 32 companies reporting payments in 2025, $2,593 in all, mostly food and beverage. Lists John Muir Medical Center - Concord Campus and 1 other hospital as hospital affiliations.
Overview
| NPI | 1588716971 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | M.S.N., O.N.P. |
| Sole proprietor | No |
| NPI issued | Jan 17, 2007 |
| Last updated in NPPES | Jul 17, 2025 |
| Certified by provider | Jul 17, 2025 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Nurse Practitioner Primary | 363L00000X | 483356 | CA |
Exclusion screening
| List | Result | Details |
|---|---|---|
| HHS-OIG LEIE · Oct 9, 2026 | No match | Checked by NPI and by name + state |
| North Carolina Medicaid · Nov 10, 2026 | No match | — |
| New York OMIG · Nov 10, 2026 | No match | — |
| Ohio Medicaid · Nov 10, 2026 | No match | — |
| Pennsylvania Medicheck · Nov 10, 2026 | No match | — |
| Washington HCA · Nov 10, 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 | 346 |
|---|---|
| Services billed | 882 across 12 procedure codes |
| Paid by Medicare | $73,208 |
Part D prescriptions in 2024
| Prescriptions (claims) | 1,811 · 2,597 30-day fills |
|---|---|
| Patients | 582 |
| Total drug cost | $7,338,855 |
| Generic share | 70% of claims |
Education and affiliations
| Graduation year | 1996 |
|---|---|
| Medicare specialty | Nurse Practitioner |
| Telehealth | Offers telehealth |
Medical group
- John Muir Physician NetworkPleasant Hill, CA · 494 clinicians
Hospital affiliations
- John Muir Medical Center - Concord CampusConcord, CA
- John Muir Medical Center - Walnut Creek CampusWalnut Creek, CA
Industry payments (Open Payments)
- 2025$2,593 · 112 payments from 32 companies
- 2024$1,764 · 62 payments from 27 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Pfizer Inc. | $308.11 | 13 |
| Astrazeneca Pharmaceuticals LP | $228.96 | 13 |
| Daiichi Sankyo Inc. | $215.71 | 11 |
| Janssen Biotech, Inc. | $179.81 | 8 |
| Merck Sharp & Dohme LLC | $173.04 | 7 |
What the 2025 payments were for
- Food and Beverage$2,496 · 110 payments
- Education$77.99 · 1 payment
- Consulting Fee$19.22 · 1 payment
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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