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

David George Thomassen, MS, LGPC

Individual provider Mental Health Counselor · NPI 1013338623

David George Thomassen, MS, LGPC is a Mental Health Counselor in Frederick, Maryland. Practices as a sole proprietor. Licensed in Maryland.

Licensed in
MD
In the registry since
2013
What do these letters mean?
MS — Master of Science
A graduate science degree.

See every abbreviation used in this directory →

Practice location Address checks out

309 E Patrick St
Frederick, MD 21701-5614
Phone: (240) 578-2322
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 LGP3782 (MD)

Record details

NPI number1013338623
Entity typeIndividual (Type 1)
GenderMale
Credentials MS , LGPC
Sole proprietorYes
NPI enumeratedDecember 27, 2013
Last updated in NPPESDecember 27, 2013

Other providers in Frederick