William Donnelly, LCSW
NPI 1154643518 · Clinical Social Worker · Los Angeles, CA
William Donnelly, LCSW is a Clinical Social Worker provider in Los Angeles, CA (NPI 1154643518).
Provider details
- NPI number
- 1154643518
- Entity type
- Individual
- Primary specialty
- Clinical Social WorkerBehavioral Health & Social Service Providers
- Credential
- LCSW
- Sex
- Male
- Sole proprietor
- Yes
- License
- LCS5398 (CA)
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
16 yrs 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
- 2010-02-25
- Last updated
- 2013-03-12
Frequently asked questions
- What is William Donnelly's NPI number?
- William Donnelly's National Provider Identifier (NPI) is 1154643518, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is William Donnelly's specialty?
- William Donnelly is listed in the NPPES registry with a primary specialty of Clinical Social Worker (Behavioral Health & Social Service Providers).
- Where is William Donnelly located?
- William Donnelly's practice location on file with NPPES is 1891 Effie St, Los Angeles, CA 90026-1711.
- What is William Donnelly's phone number?
- The practice phone number listed in the NPPES registry for William Donnelly is (323) 644-2000.
- Is William Donnelly's NPI active?
- Yes — William Donnelly's NPI (1154643518) is active in the NPPES registry as of the last update on 2013-03-12.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.