Vivian Yu
NPI 1255929980ActiveIndividual· Nurse Practitioner· Walnut Creek, CA
Nurse Practitioner with John Muir Physician Network, practicing in Walnut Creek, California. Mostly services rather than prescriptions: Medicare paid $10,444 for 50 patients in 2024, with only 28 Part D claims. Abbvie Inc. was the largest of 14 companies reporting payments in 2025, $934.91 in all, mostly food and beverage. Lists John Muir Medical Center - Concord Campus and 1 other hospital as hospital affiliations.
Overview
| NPI | 1255929980 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Sole proprietor | No |
| NPI issued | Jan 7, 2021 |
| Last updated in NPPES | Oct 31, 2024 |
| Certified by provider | Oct 31, 2024 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Nurse Practitioner Primary | 363L00000X | NP95019161 | CA |
| Registered Nurse, Critical Care Medicine | 163WC0200X | 95091387 | CA |
| Clinical Nurse Specialist, Gerontology | 364SG0600X | 95019161 | 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 | 50 |
|---|---|
| Services billed | 1,751 across 25 procedure codes |
| Paid by Medicare | $10,444 |
Part D prescriptions in 2024
| Prescriptions (claims) | 28 · 67 30-day fills |
|---|---|
| Patients | 28 |
| Total drug cost | $1,421 |
| Generic share | 100% of claims |
Education and affiliations
| Graduation year | 2021 |
|---|---|
| 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$934.91 · 32 payments from 14 companies
- 2024$108.45 · 5 payments from 4 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Abbvie Inc. | $241.02 | 7 |
| Ferring Pharmaceuticals Inc. | $229.42 | 5 |
| Astellas Pharma US Inc | $80.05 | 3 |
| Pfizer Inc. | $58.25 | 3 |
| Bayer Healthcare Pharmaceuticals Inc. | $53.47 | 2 |
What the 2025 payments were for
- Food and Beverage$934.91 · 32 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