William Simpson, LGSW
NPI 1770477085 · Clinical Social Worker · Washington, DC
William Simpson, LGSW is a Clinical Social Worker provider in Washington, DC (NPI 1770477085).
Provider details
- NPI number
- 1770477085
- Entity type
- Individual
- Primary specialty
- Clinical Social WorkerBehavioral Health & Social Service Providers
- Credential
- LGSW
- Sex
- Male
- Sole proprietor
- Yes
- License
- LG20003306 (DC)
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
- 2025-06-03
- Last updated
- 2025-06-03
- Certified
- 2025-06-03
Frequently asked questions
- What is William Simpson's NPI number?
- William Simpson's National Provider Identifier (NPI) is 1770477085, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is William Simpson's specialty?
- William Simpson is listed in the NPPES registry with a primary specialty of Clinical Social Worker (Behavioral Health & Social Service Providers).
- Where is William Simpson located?
- William Simpson's practice location on file with NPPES is 2000 P St Nw Ste 540, Washington, DC 20036-6921.
- What is William Simpson's phone number?
- The practice phone number listed in the NPPES registry for William Simpson is (202) 644-8904.
- Is William Simpson's NPI active?
- Yes — William Simpson's NPI (1770477085) is active in the NPPES registry as of the last update on 2025-06-03.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.