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

John Dennis O Brien, MD

Individual provider Pediatrics Physician · NPI 1497740203

John Dennis O Brien, MD is a Pediatrics Physician in Oskaloosa, Iowa. Licensed in Iowa. Registered with an NPI since 2005.

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

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Practice location Address checks out

410 N 12th St Ste 100
Oskaloosa, IA 52577-2495
Phone: (641) 672-3360
Fax: (641) 672-3366
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Pediatrics Physician (primary) Taxonomy 208000000X · Licence 29352 (IA)

Record details

NPI number1497740203
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorNo
NPI enumeratedSeptember 19, 2005
Last updated in NPPESDecember 5, 2012
Mailing address410 N 12th St, Suite 100, Oskaloosa, IA 52577-2495

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