Quick answers
- Where does Sean D. McWilliams see patients?
- Medicare's clinician data lists 1 practice location in Wheaton, IL. Call before your visit to confirm the address.
- What is Sean D. McWilliams's specialty?
- Medicare lists General Practice as the primary specialty, and also Peripheral Vascular Disease.
- Does Sean D. McWilliams accept Medicare assignment?
- Yes. Medicare's clinician data says Sean D. McWilliams 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 Sean D. McWilliams?
- (630) 474-2600, as listed in official Medicare / NPI Registry data.
- What is Sean D. McWilliams's NPI number?
- 1356323398. 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 Sean D. McWilliams is enrolled with Medicare (CMS data updated 2026-10-02).
- 180 Danada Sq WWheaton, IL 60189 (630) 474‑2600
Specialties
- General Practiceprimary
- Peripheral Vascular Diseasealso
Other general practitioners in Illinois
Clinicians with the same Medicare primary specialty in Illinois — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Graduation year | 1995 |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1356323398 |
| 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