Richard M. Zweig, MD
NPI 1477548451ActiveIndividual· Internal Medicine· Bristol, CT
Internal Medicine (MD) in Bristol, Connecticut, trained at State University of New York at Buffalo School of Medicine (class of 1976). Their prescriptions cost Medicare Part D more than their services did: $1,356,956 for 8,309 claims, against $79,103 paid for services in 2024. Gilead Sciences, Inc. was the largest of 15 companies reporting payments in 2025, $1,010 in all, mostly food and beverage.
Overview
| NPI | 1477548451 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | MD |
| Sole proprietor | No |
| NPI issued | Sep 15, 2005 |
| Last updated in NPPES | Jun 2, 2026 |
| Certified by provider | Jun 2, 2026 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Internal Medicine Primary | 207R00000X | 022652 | CT |
| Internal Medicine, Infectious Disease | 207RI0200X | 022652 | CT |
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 (CT) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 175 |
|---|---|
| Services billed | 1,023 across 31 procedure codes |
| Paid by Medicare | $79,103 |
Part D prescriptions in 2024
| Prescriptions (claims) | 8,309 · 17,006 30-day fills |
|---|---|
| Patients | 491 |
| Total drug cost | $1,356,956 |
| Generic share | 84% of claims |
Education and affiliations
| Medical school | State University of New York at Buffalo School of Medicine |
|---|---|
| Graduation year | 1976 |
| Medicare specialty | Internal Medicine |
| Secondary specialties | Infectious Disease |
Medical groups
- Rehabilitation Associates IncFairfield, CT · 529 clinicians
- Bristol Hospital Multi Specialty Group, Inc.Bristol, CT · 148 clinicians
Hospital affiliation
- Bristol HospitalBristol, CT
Other facilities
- Bristol Hospital Home Care AgencyHome health agency · Bristol, CT
- Nurses at Home IncHome health agency · Avon, CT
Industry payments (Open Payments)
- 2025$1,010 · 53 payments from 15 companies
- 2024$301.21 · 22 payments from 5 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Gilead Sciences, Inc. | $231.37 | 10 |
| Astrazeneca Pharmaceuticals LP | $159.78 | 14 |
| Lilly USA, LLC | $145.24 | 7 |
| Paratek Pharmaceuticals, Inc. | $75.60 | 4 |
| Glaxosmithkline, LLC. | $63.98 | 3 |
What the 2025 payments were for
- Food and Beverage$1,010 · 53 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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All 39 internal medicine physicians in Bristol · All internal medicine physicians in Connecticut