Provider records sourced from NPPES (CMS National Plan & Provider Enumeration System). Data current as of October 4, 2026.
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William R Bogan, MD

Individual provider Internal Medicine Physician · NPI 1376688127

William R Bogan, MD practises Internal Medicine in Battle Creek, Michigan. Graduated from Wayne State University School of Medicine in 1978, 48 years ago. Practices with Ascension Medical Group Promed, a 255-clinician group and accepts Medicare assignment. Licensed in Michigan.

Years since qualifying
48
Trained at
Wayne State University School of Medicine
Licensed in
MI
In the registry since
2007
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

713 Capital Ave SW
Battle Creek, MI 49015-5015 Not confirmed with CMS for 19 years — call before visiting
Phone: (269) 962-9515
Fax: (269) 969-6008
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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 WB043185 (MI)

Record details

NPI number1376688127
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorYes
NPI enumeratedFebruary 20, 2007
Last updated in NPPESJuly 8, 2007

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 1978 (48 years in practice)
Group practice Ascension Medical Group Promed — 255 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount
Practice locations3 on file with Medicare

Procedures

From CMS Care Compare, which counts the procedures a clinician billed to Original Medicare and Medicare Advantage over a recent 12-month period. CMS reports a fixed list of common procedures, so this is not everything the clinician does. Counts of 10 or fewer are given as a range, because CMS withholds small numbers.

Removal or shaving of skin growth 1–10 times
Skin biopsy 1–10 times

The percentile compares how often this clinician performed the procedure with other clinicians who performed it, as CMS calculates it. It measures volume, not outcomes or skill.

Medicare patients and services, 2024

From the CMS Medicare Physician & Other Practitioners file for calendar year 2024. It counts Original Medicare patients only, so a practice that mostly sees Medicare Advantage or privately insured patients looks smaller here than it is.

Medicare patients403
Services billed 1,579 a service is one billed item, such as a visit, a test or a procedure
Average patient age76

Dollar amounts are not shown. What Medicare pays a practice is gross billings, before staff, premises and tax and including the cost of any drugs it administers, so it is not what a clinician earns.

Practises at

Facilities the CMS Facility Affiliation file lists for this clinician. Those with a page here are linked.

Colleagues at Ascension Medical Group Promed

Clinicians the CMS Doctors & Clinicians file lists under the same group practice. CMS counts 255 clinicians in the practice; 12 are shown here.

Other providers in Battle Creek