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

Mark T. O'Brien, DO, PC

Organization Family Medicine Physician · NPI 1396943015

Mark T. O'Brien, DO, PC is a Family Medicine Physician in East China, Michigan. Licensed in Michigan. Registered with an NPI since 2007.

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

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Practice location Address checks out

4150 River Rd Ste F2
East China, MI 48054-2915
Phone: (810) 329-4660
Fax: (810) 329-4699
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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 5101009744 (MI)

Record details

NPI number1396943015
Entity typeOrganization (Type 2)
Organization subpartNo
Authorized official Mark O'Brien — Owner · (810) 329-4660
NPI enumeratedJuly 3, 2007
Last updated in NPPESAugust 22, 2020
Mailing address4150 River Rd, Suite F2, East China, MI 48054-2915

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