William Calhoun, MD
NPI 1952324303ActiveIndividual· Internal Medicine, Cardiovascular Disease· South Weymouth, MA
Internal Medicine, Cardiovascular Disease (MD) in South Weymouth, Massachusetts, trained at University of Massachusetts Medical School (class of 1983). Their prescriptions cost Medicare Part D more than their services did: $536,175 for 2,643 claims, against $164,441 paid for services in 2024. Edwards Lifesciences Corporation reported $22.76 in payments in 2025, mostly food and beverage.
Overview
| NPI | 1952324303 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | MD |
| Sole proprietor | No |
| NPI issued | Jul 26, 2006 |
| Last updated in NPPES | Jul 8, 2013 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Internal Medicine, Cardiovascular Disease Primary | 207RC0000X | 53819 | 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 - Cardiovascular Disease (Cardiology) (MA) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 1,491 |
|---|---|
| Services billed | 3,626 across 41 procedure codes |
| Paid by Medicare | $164,441 |
Part D prescriptions in 2024
| Prescriptions (claims) | 2,643 · 7,102 30-day fills |
|---|---|
| Patients | 328 |
| Total drug cost | $536,175 |
| Generic share | 83% of claims |
Education and affiliations
| Medical school | University of Massachusetts Medical School |
|---|---|
| Graduation year | 1983 |
| Medicare specialty | Cardiovascular Disease (Cardiology) |
Medical group
- South Shore Medical Center, Inc.Norwell, MA · 175 clinicians
Hospital affiliations
- Brigham and Women's HospitalBoston, MA
- South Shore HospitalSouth Weymouth, MA
Industry payments (Open Payments)
- 2025$22.76 · 1 payment from 1 company
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Edwards Lifesciences Corporation | $22.76 | 1 |
What the 2025 payments were for
- Food and Beverage$22.76 · 1 payment
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
Other Internal Medicine, Cardiovascular Disease providers in South Weymouth
- 1124079561
- 1497895213
- 1821315060
- 1457351330
- 1508843533
- 1093120636
- 1346249000
- 1922085158
- 1831176064
- 1942224654
- 1154564227
- 1669496352
All Internal Medicine, Cardiovascular Disease providers in Massachusetts →