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

Individual provider Family Medicine Physician · NPI 1346269586

Dr. Dietmar J Grentz, MD is a Family Medicine Physician in Portage, Michigan. Licensed in Illinois, Michigan and Minnesota. Registered with an NPI since 2006.

Licensed in
IL, MI, MN
In the registry since
2006
Specialties on file
3
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

2725 Airview Blvd Ste 105
Portage, MI 49002-1803
Phone: (269) 349-8386
Fax: (269) 349-8397
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Family Medicine Physician (primary) Taxonomy 207Q00000X · Licence 4301069296 (MI)
Family Medicine Physician Taxonomy 207Q00000X · Licence 39564 (MN)
Family Medicine Physician Taxonomy 207Q00000X · Licence 036069689 (IL)

Record details

NPI number1346269586
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorNo
NPI enumeratedJuly 19, 2006
Last updated in NPPESJuly 22, 2016

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