Kristen Vierregger, MD
NPI 1447699582ActiveIndividual· General Practice· Buena Park, CA
General Practice (MD) in Buena Park, California, licensed in CA, with an NPI issued in June 2013. Part D covered 281 prescriptions written in 2024, 88% of them generic. Gilead Sciences, Inc. reported $28.43 in payments in 2025, mostly food and beverage.
Overview
| NPI | 1447699582 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | MD |
| Sole proprietor | No |
| NPI issued | Jun 21, 2013 |
| Last updated in NPPES | Oct 25, 2026 |
| Certified by provider | Oct 25, 2026 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| General Practice Primary | 208D00000X | A112427 | CA |
| Pathology, Anatomic Pathology | 207ZP0101X | A112427 | 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 - General Practice (CA) |
|---|
Part D prescriptions in 2024
| Prescriptions (claims) | 281 · 515 30-day fills |
|---|---|
| Patients | 32 |
| Total drug cost | $31,557 |
| Generic share | 88% of claims |
Industry payments (Open Payments)
- 2025$28.43 · 1 payment from 1 company
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Gilead Sciences, Inc. | $28.43 | 1 |
What the 2025 payments were for
- Food and Beverage$28.43 · 1 payment
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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