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

William K Riordan, DO

Individual provider Diagnostic Radiology Physician · NPI 1447259718

William K Riordan, DO is a Diagnostic Radiology Physician in Petoskey, Michigan. Licensed in Michigan. Registered with an NPI since 2005.

Licensed in
MI
In the registry since
2005
What do these letters mean?
DO — Doctor of Osteopathic Medicine
A fully licensed physician, trained like an MD with additional musculoskeletal training. Equivalent practice rights in all 50 states.

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Practice location Address checks out

416 Connable Ave
Petoskey, MI 49770-2212
Phone: (231) 487-4000
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Diagnostic Radiology Physician (primary) Taxonomy 2085R0202X · Licence 5101010779 (MI)

Record details

NPI number1447259718
Entity typeIndividual (Type 1)
GenderMale
Credentials DO
Sole proprietorNo
NPI enumeratedJuly 19, 2005
Last updated in NPPESAugust 13, 2018

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