Quick answers
- Which hospitals does William B. Keenan work at?
- Medicare's official clinician data lists William B. Keenan at 3 hospitals: Alexian Brothers Medical Center 1, Northwestern Medicine Central Dupage Hospital and St Alexius Medical Center. This is where the clinician works or has privileges; call the hospital to confirm.
- Where does William B. Keenan see patients?
- Medicare's clinician data lists 5 practice locations, including Bartlett, IL, Hoffman Estates, IL and Hoffman Est, IL. Call before your visit to confirm the address.
- What is William B. Keenan's specialty?
- Medicare lists Diagnostic Radiology as the primary specialty.
- Does William B. Keenan accept Medicare assignment?
- Yes. Medicare's clinician data says William B. Keenan 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 William B. Keenan?
- (630) 716-7500, as listed in official Medicare / NPI Registry data.
- What is William B. Keenan's NPI number?
- 1366547259. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Hospitals where William B. Keenan works
Medicare's Facility Affiliation Data lists William B. Keenan at these hospitals (updated 2026-10-02). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians.
- Alexian Brothers Medical Center 1Elk Grove Village, IL · Acute Care Hospital · CCN 140258
- Northwestern Medicine Central Dupage HospitalWinfield, IL · Acute Care Hospital · CCN 140242
- St Alexius Medical CenterHoffman Estates, IL · Acute Care Hospital · CCN 140290
Practice locations
Addresses where William B. Keenan is enrolled with Medicare (CMS data updated 2026-10-02).
- 1041 W Stearns RdBartlett, IL 60103 (630) 716‑7500
- 1555 Barrington RdHoffman Estates, IL 60169
- 1786 Moon Lake BlvdHoffman Est, IL 60194 (847) 755‑8208
- 361 W Golf RdSchaumburg, IL 60195 (847) 952‑7447
- 800 Biesterfield RdElk Grove Village, IL 60007
Group practices
Medicare enrollment lists William B. Keenan as a member of this group (CMS data updated 2026-10-02).
- Bonaventure Medical Foundation LLC167 clinicians in the group
Specialties
- Diagnostic Radiologyprimary
Other radiologists in Bartlett
Clinicians with the same Medicare primary specialty in Bartlett, IL — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Medical school | Loyola University Of Chicago, Stritch School Of Medicine |
| Graduation year | 1990 |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1366547259 |
| 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