Allen D. Williams, MD
NPI 1073601324ActiveIndividual· Internal Medicine· Rockford, IL
Internal Medicine (MD) in Rockford, Illinois, trained at Loyola University of Chicago, Stritch School of Medicine (class of 1998). Their prescriptions cost Medicare Part D more than their services did: $1,237,612 for 13,438 claims, against $89,867 paid for services in 2024.
Overview
| NPI | 1073601324 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | MD |
| Sole proprietor | No |
| NPI issued | Oct 11, 2006 |
| Last updated in NPPES | Feb 18, 2021 |
| Certified by provider | Feb 18, 2021 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Internal Medicine Primary | 207R00000X | 036103011 | 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 | 420 |
|---|---|
| Services billed | 2,289 across 55 procedure codes |
| Paid by Medicare | $89,867 |
Part D prescriptions in 2024
| Prescriptions (claims) | 13,438 · 32,031 30-day fills |
|---|---|
| Patients | 905 |
| Total drug cost | $1,237,612 |
| Generic share | 87% of claims |
Education and affiliations
| Medical school | Loyola University of Chicago, Stritch School of Medicine |
|---|---|
| Graduation year | 1998 |
| Medicare specialty | Internal Medicine |
Medical groups
- Select Rehabilitation, LLCGlenview, IL · 2,046 clinicians
- Swedishamerican HospitalBelvidere, IL · 389 clinicians
Hospital affiliations
- Saint Anthony Medical CenterRockford, IL
- Uw HealthRockford, IL
Other facilities
- Elara Caring IxHome health agency · Huntley, IL
- Swedishamerican Hh Care Med SHome health agency · Rockford, IL
- Northern Illinois HospiceHospice · Rockford, 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 101 internal medicine physicians in Rockford · All internal medicine physicians in Illinois