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

Dr. John Michael Sullivan III, MD

Individual provider Internal Medicine Physician · NPI 1447935614

Dr. John Michael Sullivan III, MD is an Internal Medicine Physician in Grand Blanc, Michigan. Practices as a sole proprietor. Licensed in Michigan.

Licensed in
MI
In the registry since
2023
What do these letters mean?
MD — Doctor of Medicine
A physician who completed allopathic medical school.

See every abbreviation used in this directory →

Practice location Address checks out

1 Genesys Pkwy
Grand Blanc, MI 48439-8065
Phone: (810) 606-5000
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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 4351051439 (MI)

Record details

NPI number1447935614
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorYes
NPI enumeratedJune 16, 2023
Last updated in NPPESJune 16, 2023
Certification dateJune 16, 2023

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