Marlen Mertz, LCSW
NPI 1255824942 · Clinical Social Worker · Los Angeles, CA
Marlen Mertz, LCSW is a Clinical Social Worker provider in Los Angeles, CA (NPI 1255824942).
Provider details
- NPI number
- 1255824942
- Entity type
- Individual
- Primary specialty
- Clinical Social WorkerBehavioral Health & Social Service Providers
- Credential
- LCSW
- Sex
- Female
- Sole proprietor
- Yes
- License
- 23096 (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
8 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
- 2018-06-07
- Last updated
- 2018-06-07
Frequently asked questions
- What is Marlen Mertz's NPI number?
- Marlen Mertz's National Provider Identifier (NPI) is 1255824942, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Marlen Mertz's specialty?
- Marlen Mertz is listed in the NPPES registry with a primary specialty of Clinical Social Worker (Behavioral Health & Social Service Providers).
- Where is Marlen Mertz located?
- Marlen Mertz's practice location on file with NPPES is 11285 Charnock Rd Apt 2, Los Angeles, CA 90066-2974.
- What is Marlen Mertz's phone number?
- The practice phone number listed in the NPPES registry for Marlen Mertz is (571) 335-2340.
- Is Marlen Mertz's NPI active?
- Yes — Marlen Mertz's NPI (1255824942) is active in the NPPES registry as of the last update on 2018-06-07.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.