Brian Vikstrom, M.D.
NPI 1285730820ActiveIndividual· Internal Medicine, Hematology & Oncology· Vacaville, CA
Internal Medicine, Hematology & Oncology (M.D.) in Vacaville, California, trained at Columbia University College of Physicians and Surgeons (class of 1998). Their prescriptions cost Medicare Part D more than their services did: $2,531,018 for 1,230 claims, against $108,658 paid for services in 2024. Merck Sharp & Dohme LLC was the largest of 19 companies reporting payments in 2025, $1,079 in all, mostly food and beverage.
Overview
| NPI | 1285730820 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | M.D. |
| Sole proprietor | No |
| NPI issued | Sep 14, 2006 |
| Last updated in NPPES | Jul 8, 2022 |
| Certified by provider | Jul 8, 2022 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Internal Medicine, Hematology & Oncology Primary | 207RH0003X | A69795 | CA |
| Internal Medicine | 207R00000X | A 69795 | 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 - Hematology/Oncology (CA) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 319 |
|---|---|
| Services billed | 1,448 across 21 procedure codes |
| Paid by Medicare | $108,658 |
Part D prescriptions in 2024
| Prescriptions (claims) | 1,230 · 1,812 30-day fills |
|---|---|
| Patients | 150 |
| Total drug cost | $2,531,018 |
| Generic share | 76% of claims |
Education and affiliations
| Medical school | Columbia University College of Physicians and Surgeons |
|---|---|
| Graduation year | 1998 |
| Medicare specialty | Hematology/Oncology |
| Secondary specialties | Hematology |
| Telehealth | Offers telehealth |
Medical groups
- Northbay Physicians Surgery Center, LLCFairfield, CA · 324 clinicians
- Northbay Health Medical FoundationFairfield, CA · 213 clinicians
Hospital affiliations
- Northbay Medical CenterFairfield, CA
- Sutter Medical Center, SacramentoSacramento, CA
Other facilities
- Healthflex Home Health ServicesHome health agency · Oakland, CA
Industry payments (Open Payments)
- 2025$1,079 · 44 payments from 19 companies
- 2024$891.32 · 37 payments from 17 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Merck Sharp & Dohme LLC | $147.45 | 5 |
| Takeda Pharmaceuticals U.S.A., Inc. | $104.29 | 5 |
| Novartis Pharmaceuticals Corporation | $96.05 | 5 |
| Pfizer Inc. | $95.66 | 5 |
| Celgene Corporation | $92.10 | 3 |
What the 2025 payments were for
- Food and Beverage$1,079 · 44 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
Other hematologist-oncologists in Vacaville
- 1194821868
- 1790004943