Ellen Mazer, LICSW, LGSW
NPI 1265691091 · Clinical Social Worker · Washington, DC
Ellen Mazer, LICSW, LGSW is a Clinical Social Worker provider in Washington, DC (NPI 1265691091).
Provider details
- NPI number
- 1265691091
- Entity type
- Individual
- Primary specialty
- Clinical Social WorkerBehavioral Health & Social Service Providers
- Credential
- LICSW, LGSW
- Sex
- Female
- Sole proprietor
- No
- License
- LC50078471 (DC)
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
18 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
- 2008-06-06
- Last updated
- 2008-06-06
Frequently asked questions
- What is Ellen Mazer's NPI number?
- Ellen Mazer's National Provider Identifier (NPI) is 1265691091, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Ellen Mazer's specialty?
- Ellen Mazer is listed in the NPPES registry with a primary specialty of Clinical Social Worker (Behavioral Health & Social Service Providers).
- Where is Ellen Mazer located?
- Ellen Mazer's practice location on file with NPPES is 3610 38th St Nw, Washington, DC 20016-2914.
- What is Ellen Mazer's phone number?
- The practice phone number listed in the NPPES registry for Ellen Mazer is (202) 841-4860.
- Is Ellen Mazer's NPI active?
- Yes — Ellen Mazer's NPI (1265691091) is active in the NPPES registry as of the last update on 2008-06-06.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.