Derrick A. Williams, M.D.
NPI 1083815393ActiveIndividual· Internal Medicine· Fishers, IN
Opted out of Medicare from July 2020 to July 2028. Internal Medicine (M.D.) in Fishers, Indiana, licensed in IN, with an NPI issued in May 2007. Part D covered 644 prescriptions written in 2024, 89% of them generic. Exact Sciences Corporation was the largest of 10 companies reporting payments in 2025, $270.92 in all, mostly food and beverage.
Overview
| NPI | 1083815393 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | M.D. |
| Sole proprietor | No |
| NPI issued | May 31, 2007 |
| Last updated in NPPES | Nov 11, 2022 |
| Certified by provider | Nov 11, 2022 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Internal Medicine Primary | 207R00000X | 01063841A | IN |
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) | Not in the public enrollment file of Oct 1, 2026 |
|---|---|
| Opt-out | Opted out Jul 1, 2020 – Jul 1, 2028 |
| Can order and refer | Yes |
During an opt-out period the provider sees Medicare patients only under private contracts, and Medicare does not pay claims for their services.
Part D prescriptions in 2024
| Prescriptions (claims) | 644 · 1,458 30-day fills |
|---|---|
| Patients | 70 |
| Total drug cost | $72,281 |
| Generic share | 89% of claims |
Industry payments (Open Payments)
- 2025$270.92 · 14 payments from 10 companies
- 2024$129.96 · 7 payments from 6 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Exact Sciences Corporation | $63.90 | 3 |
| Boston Scientific Corporation | $38.97 | 2 |
| Stryker Corporation | $30.35 | 1 |
| Abbvie Inc. | $28.53 | 1 |
| Dexcom, Inc. | $20.42 | 1 |
What the 2025 payments were for
- Food and Beverage$270.92 · 14 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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All 37 internal medicine physicians in Fishers · All internal medicine physicians in Indiana