Quick answers
- Which hospitals does Tiffani L. Williams work at?
- Medicare's official clinician data lists Tiffani L. Williams at 1 hospital: OSF Saint Katharine Medical Center. This is where the clinician works or has privileges; call the hospital to confirm.
- Where does Tiffani L. Williams see patients?
- Medicare's clinician data lists 2 practice locations, including Polo, IL and Peoria, IL. Call before your visit to confirm the address.
- What is Tiffani L. Williams's specialty?
- Medicare lists Physician Assistant as the primary specialty.
- Does Tiffani L. Williams accept Medicare assignment?
- Yes. Medicare's clinician data says Tiffani L. 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 Tiffani L. Williams?
- (815) 946-3453, as listed in official Medicare / NPI Registry data.
- What is Tiffani L. Williams's NPI number?
- 1447589650. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Hospitals where Tiffani L. Williams works
Medicare's Facility Affiliation Data lists Tiffani L. Williams at these hospitals (updated 2026-10-02). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians.
- OSF Saint Katharine Medical CenterDixon, IL · Acute Care Hospital · CCN 140012
Practice locations
Addresses where Tiffani L. Williams is enrolled with Medicare (CMS data updated 2026-10-02).
- 1107 S Division AvePolo, IL 61064 (815) 946‑3453
- 8600 State Route 91, Suite 130Peoria, IL 61615 (309) 683‑5050
Group practices
Medicare enrollment lists Tiffani L. Williams as a member of this group (CMS data updated 2026-10-02).
- OSF Multi-Specialty Group2,114 clinicians in the group
Specialties
- Physician Assistantprimary
Other physician assistants in Illinois
Clinicians with the same Medicare primary specialty in Illinois — not a recommendation.
Clinician information
| Graduation year | 2009 |
|---|---|
| Gender (as listed) | Female |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1447589650 |
| 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