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

Individual provider Internal Medicine Physician · NPI 1295717668

Dr. John Christopher Williams, MD is an Internal Medicine in Green Bay, Wisconsin. Graduated from Indiana University School of Medicine in 1989, 37 years ago. Practices with Oneida Nation, a 35-clinician group and accepts Medicare assignment. Licensed in Wisconsin.

Years since qualifying
37
Trained at
Indiana University School of Medicine
Licensed in
WI
In the registry since
2005
What do these letters mean?
MD — Doctor of Medicine
A physician who completed allopathic medical school.

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Practice location Address checks out

1715 Dousman St
Green Bay, WI 54303-3211
Phone: (920) 496-4700
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Internal Medicine Physician (primary) Taxonomy 207R00000X · Licence 49093-020 (WI)

Record details

NPI number1295717668
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorNo
NPI enumeratedNovember 18, 2005
Last updated in NPPESNovember 21, 2019
Mailing address1715 Dousman St, Green Bay, WI 54303-3211

Medicare enrollment

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

Medicare specialtyINTERNAL MEDICINE
Medical schoolINDIANA UNIVERSITY SCHOOL OF MEDICINE
Graduated 1989 (37 years in practice)
Group practice Oneida Nation — 35 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount

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