Quick answers
- Where does William S. Mattox see patients?
- Medicare's clinician data lists 1 practice location in Bourbonnais, IL. Call before your visit to confirm the address.
- What is William S. Mattox's specialty?
- Medicare lists Nurse Practitioner as the primary specialty.
- Does William S. Mattox accept Medicare assignment?
- Yes. Medicare's clinician data says William S. Mattox 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 S. Mattox?
- (815) 939-4141, as listed in official Medicare / NPI Registry data.
- What is William S. Mattox's NPI number?
- 1720492507. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Practice locations
Addresses where William S. Mattox is enrolled with Medicare (CMS data updated 2026-10-02).
- 482 Main St NWBourbonnais, IL 60914 (815) 939‑4141
Group practices
Medicare enrollment lists William S. Mattox as a member of this group (CMS data updated 2026-10-02).
- Hospice of Kankakee Valley, Inc.4 clinicians in the group
Specialties
- Nurse Practitionerprimary
Other nurse practitioners in Bourbonnais
Clinicians with the same Medicare primary specialty in Bourbonnais, IL — not a recommendation.
Clinician information
| Graduation year | 2014 |
|---|---|
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1720492507 |
| 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
- 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