Seth Greenblatt LLC
NPI 1407653926 · Clinical Social Worker · Washington, DC
Enrolled with Medicare as Part B Supplier - Clinic/Group Practice · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Seth Greenblatt LLC is a Clinical Social Worker organization in Washington, DC (NPI 1407653926).
Provider details
- NPI number
- 1407653926
- Entity type
- Organization
- Primary specialty
- Clinical Social WorkerBehavioral Health & Social Service Providers
- Organization subpart
- No
- Authorized official
- Seth Greenblatt, Owner(703) 963-2019
Specialties & taxonomies
Behavioral Health & Social Service Providers
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure38% of score
1 yr in NPPES registry
- Profile completeness38% of score
100% of core fields populated
- Practice footprint23% of score
1 documented practice location
Signals a provider has no public data for (e.g. Medicare claims) are left out of the score entirely — never counted as zero — so providers without that data are not penalized. See the full formula and weights in our methodology.
Practice location
Mailing address
Registry dates
- Enumerated
- 2025-03-03
- Last updated
- 2026-02-04
- Certified
- 2026-02-04
Frequently asked questions
- What is Seth Greenblatt LLC's NPI number?
- Seth Greenblatt LLC's National Provider Identifier (NPI) is 1407653926, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What type of organization is Seth Greenblatt LLC?
- Seth Greenblatt LLC is classified in the NPPES registry as Clinical Social Worker (Behavioral Health & Social Service Providers).
- Where is Seth Greenblatt LLC located?
- Seth Greenblatt LLC's practice location on file with NPPES is 1615 L St Nw Ste 340, Washington, DC 20036-5617.
- What is Seth Greenblatt LLC's phone number?
- The practice phone number listed in the NPPES registry for Seth Greenblatt LLC is (703) 963-2019.
- Does Seth Greenblatt LLC accept Medicare?
- Seth Greenblatt LLC is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Who is the authorized official for Seth Greenblatt LLC?
- The authorized official listed on Seth Greenblatt LLC's NPPES record is Seth Greenblatt, Owner. The authorized official registers and maintains the organization's NPI and is not necessarily its owner.
- Is Seth Greenblatt LLC's NPI active?
- Yes — Seth Greenblatt LLC's NPI (1407653926) is active in the NPPES registry as of the last update on 2026-02-04.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.