Quick answers
- Which hospitals does Allen D. Williams work at?
- Medicare's official clinician data lists Allen D. Williams at 2 hospitals: Saint Anthony Medical Center and UW Health. This is where the clinician works or has privileges; call the hospital to confirm.
- Where does Allen D. Williams see patients?
- Medicare's clinician data lists 8 practice locations, including Rockford, IL, Glenview, IL and Rochelle, IL. Call before your visit to confirm the address.
- What is Allen D. Williams's specialty?
- Medicare lists Internal Medicine as the primary specialty.
- Does Allen D. Williams accept Medicare assignment?
- Yes. Medicare's clinician data says Allen D. Williams accepts Medicare assignment (the Medicare-approved amount as full payment for covered services), as of 2026-10-02. Ask the office to confirm before your visit.
- What is the phone number for Allen D. Williams?
- (779) 696-7910, as listed in official Medicare / NPI Registry data.
- What is Allen D. Williams's NPI number?
- 1073601324. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Hospitals where Allen D. Williams works
Medicare's Facility Affiliation Data lists Allen D. Williams at these hospitals (updated 2026-10-02). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians.
- Saint Anthony Medical CenterRockford, IL · Acute Care Hospital · CCN 140233
- UW HealthRockford, IL · Acute Care Hospital · CCN 140228
Practice locations
Addresses where Allen D. Williams is enrolled with Medicare (CMS data updated 2026-10-02). The first 5 of 8; the Medicare profile lists all.
- 2404 Charles StRockford, IL 61108 (779) 696‑7910
- 2600 Compass RdGlenview, IL 60026
- 2909 N Main StRockford, IL 61103 (779) 696‑5000
- 3505 N Bell School RdRockford, IL 61114 (779) 696‑0300
- 3535 N Bell School Rd, Regional Cancer CenterRockford, IL 61114 (779) 696‑9400
Group practices
Medicare enrollment lists Allen D. Williams as a member of these groups (CMS data updated 2026-10-02).
- Select Rehabilitation, LLC2,046 clinicians in the group
- Swedishamerican Hospital389 clinicians in the group
Specialties
- Internal Medicineprimary
Other internal medicine doctors in Rockford
Clinicians with the same Medicare primary specialty in Rockford, IL — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Medical school | Loyola University Of Chicago, Stritch School Of Medicine |
| Graduation year | 1998 |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1073601324 |
| Corrections | Report an error or suggest an update → |
Most corrections must be made at the source: clinicians update their NPI Registry record (NPPES) and their Medicare enrollment (PECOS); this page follows the next data release.
Sources
- Facility Affiliation Data — Centers for Medicare & Medicaid Services (CMS), data updated 2026-10-02, retrieved 2026-10-29
- National Downloadable File (Doctors and Clinicians) — CMS, data updated 2026-10-02, retrieved 2026-10-29
- NPI Registry — U.S. Department of Health and Human Services (NPPES), the clinician’s official record
- Medicare Care Compare — official Medicare tool to look up clinicians