William A. Gammill, DO
NPI 1437199908ActiveIndividual· Internal Medicine· Enterprise, AL
Internal Medicine (DO) in Enterprise, Alabama, trained at West Virginia School of Osteopathic Medicine (class of 2003). Their prescriptions cost Medicare Part D more than their services did: $2,051,548 for 17,769 claims, against $240,909 paid for services in 2024. Axsome Therapeutics, Inc. was the largest of 19 companies reporting payments in 2025, $1,545 in all, mostly food and beverage.
Overview
| NPI | 1437199908 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | DO |
| Sole proprietor | No |
| NPI issued | Jun 6, 2006 |
| Last updated in NPPES | Mar 22, 2010 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Internal Medicine Primary | 207R00000X | DO 868 | AL |
| Pediatrics | 208000000X | DO868 | AL |
| Emergency Medicine | 207P00000X | DO868 | AL |
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 (AL) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 510 |
|---|---|
| Services billed | 12,360 across 125 procedure codes |
| Paid by Medicare | $240,909 |
Part D prescriptions in 2024
| Prescriptions (claims) | 17,769 · 33,767 30-day fills |
|---|---|
| Patients | 811 |
| Total drug cost | $2,051,548 |
| Generic share | 84% of claims |
Education and affiliations
| Medical school | West Virginia School of Osteopathic Medicine |
|---|---|
| Graduation year | 2003 |
| Medicare specialty | Internal Medicine |
| Secondary specialties | Emergency Medicine |
Medical group
- Professional Medical Associates PCEnterprise, AL · 11 clinicians
Hospital affiliations
- Dale Medical CenterOzark, AL
- Flowers HospitalDothan, AL
- Medical Center EnterpriseEnterprise, AL
- Mizell Memorial HospitalOpp, AL
- Troy Regional Medical CenterTroy, AL
Other facilities
- Centerwell Home HealthHome health agency · Enterprise, AL
- Centerwell Home HealthHome health agency · Geneva, AL
- Enhabit Home HealthHome health agency · Dothan, AL
- Lhc Homecare of South AlabamaHome health agency · Opp, AL
- Southeast Alabama HomecareHome health agency · Enterprise, AL
- GentivaHospice · Enterprise, AL
Industry payments (Open Payments)
- 2025$1,545 · 95 payments from 19 companies
- 2024$1,554 · 114 payments from 18 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Axsome Therapeutics, Inc. | $245.37 | 9 |
| Amgen Inc. | $208.82 | 10 |
| Pfizer Inc. | $193.56 | 12 |
| Lilly USA, LLC | $183.57 | 19 |
| Novo Nordisk Inc | $154.62 | 13 |
What the 2025 payments were for
- Food and Beverage$1,545 · 95 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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