Suggest an Edit Name* Categories* Doctor Hospital Pharmacy Add category State* Locality* ZIP* Street address* Phone* Website Opening hours Monday: 09:00 am — 05:00 pm Tuesday: 09:00 am — 05:00 pm Wednesday: 09:00 am — 05:00 pm Thursday: 09:00 am — 05:00 pm Friday: 09:00 am — 05:00 pm Saturday: 09:00 am — 03:00 pm Company description Dr. Mark S O'Brien located in the city of Butler, state Indiana. The legal address of the Doctor 409 E Washington St. Directions to the Doctor Dr. Mark S O'Brien can be found on our interactive map. Ask your questions by calling 2608685843 on workdays.</br></br></br>NPI number: Data not provided</br>Provider's gender: Data not provided</br>Practice names: Data not provided</br>Board certifications: American Board of Preventive Medicine Certification in Occupational Medicine (Preventive Medicine) Your comments (not for publishing) * — Required information Dr. Mark S OBrien - Butler ← View details 409 E Washington St, Indiana, Butler, 46721, Butler, Indiana 46721 2608685843