Matthew Williams, LCSW
NPI 1780848358 · Clinical Social Worker · Sacramento, CA
Matthew Williams, LCSW is a Clinical Social Worker provider in Sacramento, CA (NPI 1780848358).
Provider details
- NPI number
- 1780848358
- Entity type
- Individual
- Primary specialty
- Clinical Social WorkerBehavioral Health & Social Service Providers
- Credential
- LCSW
- Sex
- Male
- Sole proprietor
- No
- License
- 27812 (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
17 yrs in NPPES registry
- Profile completeness38% of score
100% of core fields populated
- Practice footprint23% of score
2 documented practice locations
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
Additional practice locations (1)
- 12500 Bruceville RdElk Grove, CA 95757-9784Phone: (916) 874-6172Fax: (916) 854-9194
Registry dates
- Enumerated
- 2008-07-14
- Last updated
- 2025-12-16
- Certified
- 2025-12-16
Frequently asked questions
- What is Matthew Williams's NPI number?
- Matthew Williams's National Provider Identifier (NPI) is 1780848358, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Matthew Williams's specialty?
- Matthew Williams is listed in the NPPES registry with a primary specialty of Clinical Social Worker (Behavioral Health & Social Service Providers).
- Where is Matthew Williams located?
- Matthew Williams's practice location on file with NPPES is 651 I St, Sacramento, CA 95814-2400.
- What is Matthew Williams's phone number?
- The practice phone number listed in the NPPES registry for Matthew Williams is (916) 874-6172.
- Is Matthew Williams's NPI active?
- Yes — Matthew Williams's NPI (1780848358) is active in the NPPES registry as of the last update on 2025-12-16.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.