Provider records sourced from NPPES (CMS National Plan & Provider Enumeration System). Data current as of August 10, 2026.
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Dr. Mary K O'Farrell, PHD

Individual provider Psychologist · NPI 1912105271

Dr. Mary K O'Farrell, PHD is a Psychologist in Washington, District of Columbia. Practices as a sole proprietor. Licensed in District of Columbia.

Licensed in
DC
In the registry since
2007
What do these letters mean?
PHD — Doctor of Philosophy
A research doctorate. In healthcare it usually sits alongside a clinical licence.

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Practice location Address checks out

3000 Connecticut Ave NW Ste 214
Washington, DC 20008-2509
Phone: (202) 232-4189
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Psychologist (primary) Taxonomy 103T00000X · Licence 1490 (DC)

Record details

NPI number1912105271
Entity typeIndividual (Type 1)
GenderFemale
Credentials PHD
Sole proprietorYes
NPI enumeratedJuly 10, 2007
Last updated in NPPESJuly 10, 2007

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