Thomas O'Brien, M.D.
NPI 1801246491ActiveIndividual· Internal Medicine, Infectious Disease· Warwick, RI
Internal Medicine, Infectious Disease (M.D.) in Warwick, Rhode Island, trained at Tufts University School of Medicine (class of 2016). Their prescriptions cost Medicare Part D more than their services did: $23,761 for 79 claims, against $13,780 paid for services in 2024.
Overview
| NPI | 1801246491 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | M.D. |
| Sole proprietor | Yes |
| NPI issued | Jun 15, 2016 |
| Last updated in NPPES | Jul 28, 2021 |
| Certified by provider | Jul 28, 2021 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Internal Medicine, Infectious Disease Primary | 207RI0200X | MD17913 | RI |
| Internal Medicine | 207R00000X | LP03709 | RI |
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 - Infectious Disease (RI) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 84 |
|---|---|
| Services billed | 147 across 9 procedure codes |
| Paid by Medicare | $13,780 |
Part D prescriptions in 2024
| Prescriptions (claims) | 79 · 117 30-day fills |
|---|---|
| Patients | 36 |
| Total drug cost | $23,761 |
| Generic share | 85% of claims |
Education and affiliations
| Medical school | Tufts University School of Medicine |
|---|---|
| Graduation year | 2016 |
| Medicare specialty | Infectious Disease |
| Secondary specialties | Internal Medicine |
Medical group
- Affinity Physicians LLC.Warwick, RI · 730 clinicians
Hospital affiliations
- Kent County Memorial HospitalWarwick, RI
- The Miriam HospitalProvidence, RI
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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