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

Seth Greenblatt LLC

Organization Clinical Social Worker · NPI 1407653926

Seth Greenblatt LLC is a Clinical Social Worker in Washington, District of Columbia. Registered with an NPI since 2025.

In the registry since
2025
What do these letters mean?
LLC — Limited liability company
A form of business registration, not a clinical qualification.

See every abbreviation used in this directory →

Claim this listing Report a problem Suggest an edit

Practice location Address checks out

1615 L St NW Ste 340
Washington, DC 20036-5617
Phone: (703) 963-2019
Show map & directions

Directions in Google Maps · Apple Maps · OpenStreetMap

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

Specialties & licences

Clinical Social Worker (primary) Taxonomy 1041C0700X

Record details

NPI number1407653926
Entity typeOrganization (Type 2)
Organization subpartNo
Authorized official Seth Greenblatt — Owner · (703) 963-2019
NPI enumeratedMarch 3, 2025
Last updated in NPPESFebruary 4, 2026
Certification dateFebruary 4, 2026
Mailing address4689 Hazleton Ln, Lake Worth, FL 33449-8635

Other providers in Washington