Thomas C. Greenough, M.D.
NPI 1184607665ActiveIndividual· Internal Medicine, Infectious Disease· Worcester, MA
Internal Medicine, Infectious Disease (M.D.) in Worcester, Massachusetts, trained at University of Rochester School of Medicine and Dentistry (class of 1987). Their prescriptions cost Medicare Part D more than their services did: $1,510,906 for 966 claims, against $28,716 paid for services in 2024. Gilead Sciences, Inc. reported $3,794 in payments in 2025, mostly consulting fees.
Overview
| NPI | 1184607665 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | M.D. |
| Sole proprietor | No |
| NPI issued | Nov 29, 2005 |
| Last updated in NPPES | Jan 15, 2026 |
| Certified by provider | Jan 15, 2026 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Internal Medicine, Infectious Disease Primary | 207RI0200X | 77419 | MA |
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 (MA) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 176 |
|---|---|
| Services billed | 333 across 17 procedure codes |
| Paid by Medicare | $28,716 |
Part D prescriptions in 2024
| Prescriptions (claims) | 966 · 1,153 30-day fills |
|---|---|
| Patients | 50 |
| Total drug cost | $1,510,906 |
Education and affiliations
| Medical school | University of Rochester School of Medicine and Dentistry |
|---|---|
| Graduation year | 1987 |
| Medicare specialty | Infectious Disease |
| Telehealth | Offers telehealth |
Medical group
- Umass Memorial Medical Group IncWorcester, MA · 2,516 clinicians
Hospital affiliations
- Umass Memorial Health - Harrington HospitalSouthbridge, MA
- Umass Memorial Healthalliance HospitalsLeominster, MA
- Umass Memorial Medical Center/University CampusWorcester, MA
Industry payments (Open Payments)
- 2025$3,794 · 10 payments from 1 company
- 2024$20,221 · 2 payments from 1 company
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Gilead Sciences, Inc. | $3,794 | 10 |
What the 2025 payments were for
- Consulting Fee$1,348 · 2 payments
- Travel and Lodging$1,313 · 3 payments
- Education$975.00 · 1 payment
- Food and Beverage$158.50 · 4 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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All 56 infectious disease specialists in Worcester · All infectious disease specialists in Massachusetts