Ruth Maser
NPI 1265566350 · Clinical Social Worker · Los Angeles, CA
Ruth Maser is a Clinical Social Worker provider in Los Angeles, CA (NPI 1265566350).
Provider details
- NPI number
- 1265566350
- Entity type
- Individual
- Primary specialty
- Clinical Social WorkerBehavioral Health & Social Service Providers
- Sex
- Female
- Sole proprietor
- No
- License
- LCS 24858 (CA)
Specialties & taxonomies
Behavioral Health & Social Service Providers
Respiratory, Developmental, Rehabilitative and Restorative 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
- 2007-03-14
- Last updated
- 2010-01-08
Frequently asked questions
- What is Ruth Maser's NPI number?
- Ruth Maser's National Provider Identifier (NPI) is 1265566350, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Ruth Maser's specialty?
- Ruth Maser is listed in the NPPES registry with a primary specialty of Clinical Social Worker (Behavioral Health & Social Service Providers).
- Where is Ruth Maser located?
- Ruth Maser's practice location on file with NPPES is 600 St Paul Ave Ste 100, Los Angeles, CA 90017-5658.
- What is Ruth Maser's phone number?
- The practice phone number listed in the NPPES registry for Ruth Maser is (213) 482-6400.
- Is Ruth Maser's NPI active?
- Yes — Ruth Maser's NPI (1265566350) is active in the NPPES registry as of the last update on 2010-01-08.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.