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

Dr. Mark D O'Brien, DO

Individual provider Pediatrics Physician · NPI 1265532212

Dr. Mark D O'Brien, DO is a Pediatrics Physician in Fort Wayne, Indiana. Licensed in Indiana. Registered with an NPI since 2006.

Licensed in
IN
In the registry since
2006
What do these letters mean?
DO — Doctor of Osteopathic Medicine
A fully licensed physician, trained like an MD with additional musculoskeletal training. Equivalent practice rights in all 50 states.

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Practice location Address checks out

6507 E State Blvd
Fort Wayne, IN 46815-7026
Phone: (260) 486-3300
Fax: (260) 486-3600
Show map & directions

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

Specialties & licences

Pediatrics Physician (primary) Taxonomy 208000000X · Licence 02001451A (IN)

Record details

NPI number1265532212
Entity typeIndividual (Type 1)
GenderMale
Credentials DO
Sole proprietorNo
NPI enumeratedSeptember 22, 2006
Last updated in NPPESApril 14, 2025
Certification dateApril 14, 2025
Mailing address11109 Parkview Plaza Dr # 117, Fort Wayne, IN 46845-1701

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