Provider records sourced from NPPES (CMS National Plan & Provider Enumeration System). Data current as of October 4, 2026.
NPIDirectory

Mark T. O'Brien, DO, PC

Organization Family Medicine Physician · NPI 1396943015

Mark T. O'Brien, DO, PC provides Family Medicine Physician services 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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