Provider records sourced from NPPES (CMS National Plan & Provider Enumeration System). Data current as of August 10, 2026.

Dr. Geoffrey Colin Williams, MD, PHD

Individual provider Internal Medicine Physician · NPI 1386673622

Dr. Geoffrey Colin Williams, MD, PHD is an Internal Medicine in Ann Arbor, Michigan. Graduated from Wayne State University School of Medicine in 1983, 43 years ago. Practices with Regents of the University of Michigan, a 3,271-clinician group, works from 2 locations, accepts Medicare assignment and offers telehealth. Licensed in Michigan and New York.

Years since qualifying
43
Trained at
Wayne State University School of Medicine
Licensed in
MI, NY
In the registry since
2006
Specialties on file
2
What do these letters mean?
MD — Doctor of Medicine
A physician who completed allopathic medical school.
PHD — Doctor of Philosophy
A research doctorate. In healthcare it usually sits alongside a clinical licence.

See every abbreviation used in this directory →

Practice location Address checks out

24 Frank Lloyd Wright Dr
Ann Arbor, MI 48105-9484
Phone: (888) 287-1082
Show map & directions

Pin is approximate — placed at the ZIP-code centre, not the exact door.

Additional practice locations (1)

  • 601 Elmwood Ave, Rochester, NY 14642-0001 — (585) 530-2050

Specialties & licences

Internal Medicine Physician (primary) Taxonomy 207R00000X · Licence 4301508919 (MI)
Internal Medicine Physician Taxonomy 207R00000X · Licence 162638 (NY)

Record details

NPI number1386673622
Entity typeIndividual (Type 1)
GenderMale
Credentials MD , PHD
Sole proprietorNo
NPI enumeratedJune 30, 2006
Last updated in NPPESSeptember 15, 2023
Certification dateSeptember 15, 2023

Medicare enrollment

From the CMS Doctors & Clinicians file — this clinician is enrolled in Medicare.

Medicare specialtyINTERNAL MEDICINE
Medical schoolWAYNE STATE UNIVERSITY SCHOOL OF MEDICINE
Graduated 1983 (43 years in practice)
Group practice Regents Of The University Of Michigan — 3271 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount
TelehealthOffers telehealth services
Practice locations2 on file with Medicare

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