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

MS. Dia Claire Costello I, LICSW

Individual provider Clinical Social Worker · NPI 1538575196

MS. Dia Claire Costello I, LICSW is a Clinical Social Worker in Glen Echo, Maryland. Practices as a sole proprietor. Licensed in District of Columbia.

Licensed in
DC
In the registry since
2014
What do these letters mean?
LICSW — Licensed Independent Clinical Social Worker
The title some states use for an independently practising clinical social worker.

See every abbreviation used in this directory →

Practice location Address checks out

6100 Harvard Ave
Glen Echo, MD 20812-1116
Phone: (301) 263-9616
Show map & directions

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

Specialties & licences

Clinical Social Worker (primary) Taxonomy 1041C0700X · Licence LC302342 (DC)

Record details

NPI number1538575196
Entity typeIndividual (Type 1)
GenderFemale
Credentials LICSW
Sole proprietorYes
NPI enumeratedJuly 3, 2014
Last updated in NPPESJuly 3, 2014