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

Dr. Trygve Brownell Trosper, PHD

Individual provider Mental Health Counselor · NPI 1932367091

Dr. Trygve Brownell Trosper, PHD is a Mental Health Counselor in Washington, District of Columbia. Practices as a sole proprietor. Licensed in District of Columbia.

Licensed in
DC
In the registry since
2008
What do these letters mean?
PHD — Doctor of Philosophy
A research doctorate. In healthcare it usually sits alongside a clinical licence.

See every abbreviation used in this directory →

Practice location Address checks out

1200 G St NW Ste 800
Washington, DC 20005-3814
Phone: (202) 434-4533
Fax: (202) 434-8707
Show map & directions

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

Specialties & licences

Mental Health Counselor (primary) Taxonomy 101YM0800X · Licence PRC13954 (DC)

Record details

NPI number1932367091
Entity typeIndividual (Type 1)
GenderMale
Credentials PHD
Sole proprietorYes
NPI enumeratedMay 27, 2008
Last updated in NPPESMay 27, 2008

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