Brian P. O'Sullivan
NPI 1801926662ActiveIndividual· Internal Medicine· Centennial, CO
Internal Medicine in Centennial, Colorado, trained at Geisel School of Medicine at Dartmouth (class of 1993). Part D covered 15,786 prescriptions written in 2024, 90% of them generic.
Overview
| NPI | 1801926662 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Sole proprietor | No |
| NPI issued | Mar 7, 2007 |
| Last updated in NPPES | Jun 3, 2021 |
| Certified by provider | Jun 3, 2021 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Internal Medicine Primary | 207R00000X | 43257 | CO |
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 - Internal Medicine (CO) |
|---|
Part D prescriptions in 2024
| Prescriptions (claims) | 15,786 · 40,953 30-day fills |
|---|---|
| Patients | 1,200 |
| Total drug cost | $735,885 |
| Generic share | 90% of claims |
Education and affiliations
| Medical school | Geisel School of Medicine at Dartmouth |
|---|---|
| Graduation year | 1993 |
| Medicare specialty | Internal Medicine |
Medical group
- Colorado Permanente Medical Group PCDenver, CO · 1,327 clinicians
Hospital affiliation
- Baystate Medical CenterSpringfield, MA
Industry payments (Open Payments)
None reported for 2025 or 2024.
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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All 38 internal medicine physicians in Centennial · All internal medicine physicians in Colorado