Provider records sourced from NPPES (CMS National Plan & Provider Enumeration System). Data current as of August 10, 2026.
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Dr. Melissa Ann O'Connell Liggett, PHD

Individual provider Clinical Psychologist · NPI 1528206778

Dr. Melissa Ann O'Connell Liggett, PHD is a Clinical Psychologist in Washington, District of Columbia. Licensed in District of Columbia. Registered with an NPI since 2009.

Licensed in
DC
In the registry since
2009
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

111 Michigan Ave NW
Washington, DC 20010-2916
Phone: (202) 476-5405
Fax: (202) 476-4043
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Clinical Psychologist (primary) Taxonomy 103TC0700X · Licence 1000522 (DC)

Record details

NPI number1528206778
Entity typeIndividual (Type 1)
GenderFemale
Credentials PHD
Sole proprietorNo
NPI enumeratedJanuary 27, 2009
Last updated in NPPESJanuary 11, 2017

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