Claire Siverson, LCSW
NPI 1598974255 · Social Worker · Vallejo, CA
Claire Siverson, LCSW is a Social Worker provider in Vallejo, CA (NPI 1598974255).
Provider details
- NPI number
- 1598974255
- Entity type
- Individual
- Primary specialty
- Social WorkerBehavioral Health & Social Service Providers
- Credential
- LCSW
- Sex
- Female
- Sole proprietor
- Yes
- License
- 18079 (CA)
Specialties & taxonomies
Behavioral Health & Social Service Providers
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
19 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
- 2007-05-21
- Last updated
- 2023-07-13
- Certified
- 2023-07-13
Frequently asked questions
- What is Claire Siverson's NPI number?
- Claire Siverson's National Provider Identifier (NPI) is 1598974255, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Claire Siverson's specialty?
- Claire Siverson is listed in the NPPES registry with a primary specialty of Social Worker (Behavioral Health & Social Service Providers).
- Where is Claire Siverson located?
- Claire Siverson's practice location on file with NPPES is 236 Georgia St, Vallejo, CA 94590-5962.
- What is Claire Siverson's phone number?
- The practice phone number listed in the NPPES registry for Claire Siverson is (707) 558-6730.
- Is Claire Siverson's NPI active?
- Yes — Claire Siverson's NPI (1598974255) is active in the NPPES registry as of the last update on 2023-07-13.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.