William Holloway, LCSW
NPI 1740920917 · Clinical Social Worker · El Cajon, CA
Enrolled with Medicare as Practitioner - Clinical Social Worker · source: CMS PECOS Public Provider Enrollment (2026.04.01)
William Holloway, LCSW is a Clinical Social Worker provider in El Cajon, CA (NPI 1740920917).
Provider details
- NPI number
- 1740920917
- Entity type
- Individual
- Primary specialty
- Clinical Social WorkerBehavioral Health & Social Service Providers
- Credential
- LCSW
- Sex
- Male
- Sole proprietor
- Yes
- License
- 107307 (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
4 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
- 2022-03-29
- Last updated
- 2024-06-28
- Certified
- 2024-06-28
Frequently asked questions
- What is William Holloway's NPI number?
- William Holloway's National Provider Identifier (NPI) is 1740920917, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is William Holloway's specialty?
- William Holloway is listed in the NPPES registry with a primary specialty of Clinical Social Worker (Behavioral Health & Social Service Providers).
- Where is William Holloway located?
- William Holloway's practice location on file with NPPES is 8233 Limon Ln, El Cajon, CA 92021-1122.
- What is William Holloway's phone number?
- The practice phone number listed in the NPPES registry for William Holloway is (951) 385-7014.
- Does William Holloway accept Medicare?
- William Holloway is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is William Holloway's NPI active?
- Yes — William Holloway's NPI (1740920917) is active in the NPPES registry as of the last update on 2024-06-28.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.