William B. Calhoun, MD
NPI 1932219177ActiveIndividual· Internal Medicine, Cardiovascular Disease· Tupelo, MS
Internal Medicine, Cardiovascular Disease (MD) in Tupelo, Mississippi, trained at Louisiana State University School of Medicine in Shreveport (class of 1989). In 2024 Medicare paid $645,812 for 3,947 patients, and Part D covered 4,794 of their prescriptions, 83% of them generic. Alnylam Pharmaceuticals Inc. was the largest of 9 companies reporting payments in 2025, $455.65 in all, mostly food and beverage.
Overview
| NPI | 1932219177 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | MD |
| Sole proprietor | No |
| NPI issued | Aug 30, 2006 |
| Last updated in NPPES | Jul 12, 2019 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Internal Medicine, Cardiovascular Disease Primary | 207RC0000X | 14856 | MS |
Exclusion screening
| List | Result | Details |
|---|---|---|
| HHS-OIG LEIE · Oct 9, 2026 | No match | Checked by NPI and by name + state |
| North Carolina Medicaid · Nov 10, 2026 | No match | — |
| New York OMIG · Nov 10, 2026 | No match | — |
| Ohio Medicaid · Nov 10, 2026 | No match | — |
| Pennsylvania Medicheck · Nov 10, 2026 | No match | — |
| Washington HCA · Nov 10, 2026 | No match | — |
Official OIG search · How matching works ·Bulk check a roster
Medicare
| Enrollment (PECOS) | Enrolled Practitioner - Cardiovascular Disease (Cardiology) (MS) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 3,947 |
|---|---|
| Services billed | 20,101 across 107 procedure codes |
| Paid by Medicare | $645,812 |
Part D prescriptions in 2024
| Prescriptions (claims) | 4,794 · 11,258 30-day fills |
|---|---|
| Patients | 847 |
| Total drug cost | $790,180 |
| Generic share | 83% of claims |
Education and affiliations
| Medical school | Louisiana State University School of Medicine in Shreveport |
|---|---|
| Graduation year | 1989 |
| Medicare specialty | Cardiovascular Disease (Cardiology) |
Medical groups
- North Mississippi Medical Center Services LLCTupelo, MS · 29 clinicians
- North Mississippi Clinics LLCTupelo, MS · 23 clinicians
Hospital affiliations
- Clay County Medical CorporationWest Point, MS
- Marion Regional Medical CenterHamilton, AL
- North Mississippi Medical CenterTupelo, MS
- North Mississippi Medical Center-Gilmore AmoryAmory, MS
- Tishomingo Health Services IncIuka, MS
Industry payments (Open Payments)
- 2025$455.65 · 15 payments from 9 companies
- 2024$496.53 · 23 payments from 13 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Alnylam Pharmaceuticals Inc. | $179.48 | 6 |
| Boston Scientific Corporation | $144.95 | 2 |
| Scpharmaceuticals Inc. | $23.58 | 1 |
| Daiichi Sankyo Inc. | $22.89 | 1 |
| Merck Sharp & Dohme LLC | $20.25 | 1 |
What the 2025 payments were for
- Food and Beverage$455.65 · 15 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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