Dennis H. Rapa, MD
NPI 1730142761ActiveIndividual· Internal Medicine· Natick, MA
Internal Medicine (MD) with Charles River Medical Associates, PC, practicing in Natick, Massachusetts. Their prescriptions cost Medicare Part D more than their services did: $660,701 for 1,765 claims, against $37,985 paid for services in 2024. Madrigal Pharmaceuticals was the largest of 4 companies reporting payments in 2025, $236.37 in all, mostly food and beverage. Lists Newton-Wellesley Hospital as a hospital affiliation.
Overview
| NPI | 1730142761 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | MD |
| Sole proprietor | No |
| NPI issued | Apr 10, 2006 |
| Last updated in NPPES | Aug 9, 2010 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Internal Medicine Primary | 207R00000X | 44620 | MA |
| Internal Medicine, Endocrinology, Diabetes & Metabolism | 207RE0101X | 44620 | 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 - Internal Medicine (MA) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 136 |
|---|---|
| Services billed | 576 across 12 procedure codes |
| Paid by Medicare | $37,985 |
Part D prescriptions in 2024
| Prescriptions (claims) | 1,765 · 3,475 30-day fills |
|---|---|
| Patients | 176 |
| Total drug cost | $660,701 |
| Generic share | 45% of claims |
Education and affiliations
| Graduation year | 1973 |
|---|---|
| Medicare specialty | Internal Medicine |
Medical group
- Charles River Medical Associates, PCHudson, MA · 119 clinicians
Hospital affiliation
- Newton-Wellesley HospitalNewton, MA
Industry payments (Open Payments)
- 2025$236.37 · 10 payments from 4 companies
- 2024$24.73 · 1 payment from 1 company
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Madrigal Pharmaceuticals | $113.45 | 4 |
| Lilly USA, LLC | $47.50 | 3 |
| Novo Nordisk Inc | $38.44 | 2 |
| Corcept Therapeutics | $36.98 | 1 |
What the 2025 payments were for
- Food and Beverage$236.37 · 10 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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All 29 internal medicine physicians in Natick · All internal medicine physicians in Massachusetts