Quick answers
- Which hospitals does Shanna B. Williams work at?
- Medicare's official clinician data lists Shanna B. Williams at 2 hospitals: Mercy Health Saint Mary's and University of Michigan Health - West. This is where the clinician works or has privileges; call the hospital to confirm.
- Where does Shanna B. Williams see patients?
- Medicare's clinician data lists 6 practice locations, including Caledonia, MI and Wyoming, MI. Call before your visit to confirm the address.
- What is Shanna B. Williams's specialty?
- Medicare lists General Surgery as the primary specialty.
- Does Shanna B. Williams accept Medicare assignment?
- Yes. Medicare's clinician data says Shanna B. 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 Shanna B. Williams?
- (616) 685-8850, as listed in official Medicare / NPI Registry data.
- What is Shanna B. Williams's NPI number?
- 1245416775. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Hospitals where Shanna B. Williams works
Medicare's Facility Affiliation Data lists Shanna B. Williams at these hospitals (updated 2026-10-02). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians.
- Mercy Health Saint Mary'sGrand Rapids, MI · Acute Care Hospital · CCN 230059
- University of Michigan Health - WestWyoming, MI · Acute Care Hospital · CCN 230236
Practice locations
Addresses where Shanna B. Williams is enrolled with Medicare (CMS data updated 2026-10-02). The first 5 of 6; the Medicare profile lists all.
- 10047 Crossroad Ct SECaledonia, MI 49316 (616) 685‑8850
- 1045 Gezon Pkwy SWWyoming, MI 49509 (616) 456‑5311
- 2122 Health Dr SWWyoming, MI 49519
- 5900 Byron Ctr AveWyoming, MI 49519
- 5900 Byron Ctr Ave SWWyoming, MI 49519
Group practices
Medicare enrollment lists Shanna B. Williams as a member of these groups (CMS data updated 2026-10-02).
- Advantage Health/Saint Mary's Medical Group505 clinicians in the group
- Metropolitan Hospital415 clinicians in the group
- West Michigan Surgical Specialists PLC11 clinicians in the group
Specialties
- General Surgeryprimary
Other general surgeons in Caledonia
Clinicians with the same Medicare primary specialty in Caledonia, MI — not a recommendation.
Clinician information
| Credential | DO |
|---|---|
| Graduation year | 2007 |
| Gender (as listed) | Female |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1245416775 |
| 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