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

Dr. Mary Lynn O'Brien, MD

Individual provider Developmental - Behavioral Pediatrics Physician · NPI 1124115936

Dr. Mary Lynn O'Brien, MD is a Developmental - Behavioral Pediatrics Physician in Portland, Oregon. Licensed in Oregon. Registered with an NPI since 2006.

Licensed in
OR
In the registry since
2006
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

3600 N Interstate Ave
Portland, OR 97227-1106
Phone: (503) 813-2000
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Developmental - Behavioral Pediatrics Physician (primary) Taxonomy 2080P0006X · Licence MD09334 (OR)

Record details

NPI number1124115936
Entity typeIndividual (Type 1)
GenderFemale
Credentials MD
Sole proprietorNo
NPI enumeratedOctober 5, 2006
Last updated in NPPESJuly 13, 2007

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