Diane M. Williams, MD
Internal Medicine, Gastroenterology (MD) in Pinehurst, North Carolina, trained at University of Minnesota Medical School (class of 1987). Their prescriptions cost Medicare Part D more than their services did: $614,324 for 994 claims, against $239,068 paid for services in 2024. Abbvie Inc. was the largest of 14 companies reporting payments in 2025, $654.59 in all, mostly food and beverage. A record with the same name and state is on the OIG exclusion list; it carries no NPI, so check it before acting.
Overview
| NPI | 1598700767 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | MD |
| Sole proprietor | No |
| NPI issued | Jun 19, 2006 |
| Last updated in NPPES | Jan 25, 2018 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Internal Medicine, Gastroenterology Primary | 207RG0100X | 38656 | NC |
Exclusion screening
Possible match: verify before acting. The OIG list has a record with the same name in North Carolina, but that record carries no NPI, so it may be a different person or business.
| Matched by | Name on OIG list | Exclusion type | Excluded since | Location |
|---|---|---|---|---|
| Name + state | Diane Lynn Williams · Nurse/Nurses Aide | 1128b4 | Jul 19, 2012 | Fayetteville, NC |
| List | Result | Details |
|---|---|---|
| HHS-OIG LEIE · Oct 9, 2026 | Possible (name) | See above |
| 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 - Gastroenterology (NC) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 569 |
|---|---|
| Services billed | 20,380 across 88 procedure codes |
| Paid by Medicare | $239,068 |
Part D prescriptions in 2024
| Prescriptions (claims) | 994 · 1,372 30-day fills |
|---|---|
| Patients | 504 |
| Total drug cost | $614,324 |
| Generic share | 75% of claims |
Education and affiliations
| Medical school | University of Minnesota Medical School |
|---|---|
| Graduation year | 1987 |
| Medicare specialty | Gastroenterology |
Medical group
- Pinehurst Medical Clinic IncWest End, NC · 165 clinicians
Hospital affiliation
- Firsthealth Moore Regional HospitalPinehurst, NC
Industry payments (Open Payments)
- 2025$654.59 · 29 payments from 14 companies
- 2024$1,079 · 43 payments from 15 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Abbvie Inc. | $181.68 | 8 |
| Janssen Biotech, Inc. | $145.33 | 2 |
| Takeda Pharmaceuticals U.S.A., Inc. | $57.20 | 3 |
| Phathom Pharmaceuticals, Inc. | $45.80 | 4 |
| Pfizer Inc. | $44.94 | 3 |
What the 2025 payments were for
- Food and Beverage$654.59 · 29 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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All Internal Medicine, Gastroenterology providers in North Carolina →