Quick answers
- Which hospitals does Geoffrey C. Williams work at?
- Medicare's official clinician data lists Geoffrey C. Williams at 1 hospital: University of Michigan Health System. This is where the clinician works or has privileges; call the hospital to confirm.
- Where does Geoffrey C. Williams see patients?
- Medicare's clinician data lists 2 practice locations, including Canton, MI and Ann Arbor, MI. Call before your visit to confirm the address.
- What is Geoffrey C. Williams's specialty?
- Medicare lists Internal Medicine as the primary specialty.
- Does Geoffrey C. Williams accept Medicare assignment?
- Yes. Medicare's clinician data says Geoffrey C. 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.
- Does Geoffrey C. Williams offer telehealth?
- Medicare's clinician data says Geoffrey C. Williams offers telehealth services. Ask the office which visits can be done by video or phone.
- What is the phone number for Geoffrey C. Williams?
- (888) 287-1082, as listed in official Medicare / NPI Registry data.
- What is Geoffrey C. Williams's NPI number?
- 1386673622. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Hospitals where Geoffrey C. Williams works
Medicare's Facility Affiliation Data lists Geoffrey C. Williams at these hospitals (updated 2026-10-02). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians.
- University of Michigan Health SystemAnn Arbor, MI · Acute Care Hospital · CCN 230046
Practice locations
Addresses where Geoffrey C. Williams is enrolled with Medicare (CMS data updated 2026-10-02).
- 1051 N Canton Ctr RdCanton, MI 48187 (888) 287‑1082
- 24 Frank Lloyd Wright DrAnn Arbor, MI 48105 (888) 287‑1082
Group practices
Medicare enrollment lists Geoffrey C. Williams as a member of this group (CMS data updated 2026-10-02).
- Regents of the University of Michigan3,346 clinicians in the group
Specialties
- Internal Medicineprimary
Other internal medicine doctors in Canton
Clinicians with the same Medicare primary specialty in Canton, MI — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Medical school | Wayne State University School Of Medicine |
| Graduation year | 1983 |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| Telehealth | Offers telehealth services |
| NPI (National Provider Identifier) | 1386673622 |
| 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