Provider records sourced from NPPES (CMS National Plan & Provider Enumeration System). Data current as of August 10, 2026.
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Dr. Mark Timothy Sweeney, PHD, LPC

Individual provider Professional Counselor · NPI 1205167038

Dr. Mark Timothy Sweeney, PHD, LPC is a Professional Counselor in Washington, District of Columbia. Licensed in District of Columbia. Registered with an NPI since 2010.

Licensed in
DC
In the registry since
2010
What do these letters mean?
PHD — Doctor of Philosophy
A research doctorate. In healthcare it usually sits alongside a clinical licence.
LPC — Licensed Professional Counselor
A licensed mental health counsellor.

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Practice location Address checks out

1253 Walter St SE
Washington, DC 20003-1449
Phone: (202) 596-5951
Fax: (866) 712-1080
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Professional Counselor (primary) Taxonomy 101YP2500X · Licence PRC13878 (DC)

Record details

NPI number1205167038
Entity typeIndividual (Type 1)
GenderMale
Credentials PHD , LPC
Sole proprietorNo
NPI enumeratedJanuary 18, 2010
Last updated in NPPESJanuary 18, 2010

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