William James Calhoun, MD
NPI 1811056567ActiveIndividual· Internal Medicine, Pulmonary Disease· Galveston, TX
Internal Medicine, Pulmonary Disease (MD) in Galveston, Texas, licensed in TX, with an NPI issued in December 2006. Their prescriptions cost Medicare Part D more than their services did: $324,149 for 307 claims, against $9,909 paid for services in 2024. Genzyme Corporation was the largest of 3 companies reporting payments in 2025, $51,746 in all, mostly speaking and faculty fees.
Overview
| NPI | 1811056567 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | MD |
| Sole proprietor | No |
| NPI issued | Dec 8, 2006 |
| Last updated in NPPES | Jan 24, 2020 |
| Certified by provider | Jan 24, 2020 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Internal Medicine, Pulmonary Disease Primary | 207RP1001X | N1274 | TX |
| Internal Medicine, Allergy & Immunology | 207RA0201X | N1274 | TX |
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 - Internal Medicine (TX) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 147 |
|---|---|
| Services billed | 323 across 18 procedure codes |
| Paid by Medicare | $9,909 |
Part D prescriptions in 2024
| Prescriptions (claims) | 307 · 402 30-day fills |
|---|---|
| Patients | 42 |
| Total drug cost | $324,149 |
| Generic share | 36% of claims |
Industry payments (Open Payments)
- 2025$51,746 · 17 payments from 3 companies
- 2024$137,819 · 71 payments from 5 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Genzyme Corporation | $31,218 | 13 |
| Aquestive Therapeutics, Inc. | $13,426 | 2 |
| Regeneron Healthcare Solutions, Inc. | $7,102 | 2 |
What the 2025 payments were for
- Compensation for services other than consulting, including serving as faculty or as a speaker at a venue other than a continuing education program$33,931 · 8 payments
- Travel and Lodging$8,775 · 4 payments
- Consulting Fee$8,625 · 1 payment
- Food and Beverage$414.34 · 4 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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