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

Dr. Mary Ann O'Brien, MD

Individual provider Family Medicine Physician · NPI 1013902162

Dr. Mary Ann O'Brien, MD is a Family Medicine Physician in Fort Wayne, Indiana. Licensed in Indiana. Registered with an NPI since 2005.

Licensed in
IN
In the registry since
2005
What do these letters mean?
MD — Doctor of Medicine
A physician who completed allopathic medical school.

See every abbreviation used in this directory →

Practice location Address checks out

3909 New Vision Dr
Fort Wayne, IN 46845-1725
Phone: (260) 496-6602
Fax: (260) 969-3065
Show map & directions

Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Family Medicine Physician (primary) Taxonomy 207Q00000X · Licence 01037346A (IN)

Record details

NPI number1013902162
Entity typeIndividual (Type 1)
GenderFemale
Credentials MD
Sole proprietorNo
NPI enumeratedSeptember 14, 2005
Last updated in NPPESSeptember 20, 2013

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