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

Mark C. Antonishen, MD, PLLC

Organization Internal Medicine Physician · NPI 1861681819

Mark C. Antonishen, MD, PLLC is an Internal Medicine Physician in Petoskey, Michigan. Licensed in Michigan. Registered with an NPI since 2007.

Licensed in
MI
In the registry since
2007
What do these letters mean?
PLLC — Professional limited liability company
A form of business registration, not a clinical qualification.

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Practice location Address checks out

405 N Division Rd Ste 3
Petoskey, MI 49770-9045
Phone: (231) 487-6030
Fax: (231) 487-6010
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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 4301046169 (MI)

Record details

NPI number1861681819
Entity typeOrganization (Type 2)
Organization subpartNo
Authorized official Mark Antonishen — President · (231) 487-6030
NPI enumeratedOctober 16, 2007
Last updated in NPPESOctober 16, 2007
Mailing address405 N Division Rd, Ste 3, Petoskey, MI 49770-9045

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