Don J. Williams, MD
NPI 1447288287ActiveIndividual· Internal Medicine· Oak Park, IL
Internal Medicine (MD) with Dynamic Physical Therapy, Inc., practicing in Oak Park, Illinois. Their prescriptions cost Medicare Part D more than their services did: $196,337 for 4,892 claims, against $65,149 paid for services in 2024. Lists Elmhurst Memorial Hospital as a hospital affiliation.
Overview
| NPI | 1447288287 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | MD |
| Sole proprietor | No |
| NPI issued | Jun 29, 2006 |
| Last updated in NPPES | May 19, 2022 |
| Certified by provider | Apr 27, 2021 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Internal Medicine Primary | 207R00000X | 036081395 | IL |
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) | Enrolled Practitioner - Internal Medicine (IL) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 185 |
|---|---|
| Services billed | 721 across 29 procedure codes |
| Paid by Medicare | $65,149 |
Part D prescriptions in 2024
| Prescriptions (claims) | 4,892 · 11,600 30-day fills |
|---|---|
| Patients | 335 |
| Total drug cost | $196,337 |
| Generic share | 93% of claims |
Education and affiliations
| Graduation year | 1986 |
|---|---|
| Medicare specialty | Internal Medicine |
Medical group
- Dynamic Physical Therapy, Inc.Oak Park, IL · 43 clinicians
Hospital affiliation
- Elmhurst Memorial HospitalElmhurst, IL
Industry payments (Open Payments)
None reported for 2025 or 2024.
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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All 83 internal medicine physicians in Oak Park · All internal medicine physicians in Illinois