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

John Diddams, MD

Individual provider Otolaryngology Physician · NPI 1720390941

John Diddams, MD is an Otolaryngology Physician in Marquette, Michigan. Practices as a sole proprietor. Licensed in Michigan.

Licensed in
MI
In the registry since
2010
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

425 E Michigan St
Marquette, MI 49855-3827
Phone: (906) 228-6589
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Otolaryngology Physician (primary) Taxonomy 207Y00000X · Licence 4301032322 (MI)

Record details

NPI number1720390941
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorYes
NPI enumeratedJuly 2, 2010
Last updated in NPPESJuly 2, 2010
Mailing address425 E Michigan St, Marquette, MI 49855-3827

Other providers in Marquette