John Derwart
NPI 1003345968 · Marriage & Family Therapist · Los Angeles, CA
John Derwart is a Marriage & Family Therapist provider in Los Angeles, CA (NPI 1003345968).
Provider details
- NPI number
- 1003345968
- Entity type
- Individual
- Primary specialty
- Marriage & Family TherapistBehavioral Health & Social Service Providers
- Sex
- Male
- Sole proprietor
- No
Specialties & taxonomies
Behavioral Health & Social Service Providers
Student, Health Care
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure38% of score
9 yrs in NPPES registry
- Profile completeness38% of score
83% 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
- 2017-06-05
- Last updated
- 2022-07-21
Frequently asked questions
- What is John Derwart's NPI number?
- John Derwart's National Provider Identifier (NPI) is 1003345968, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is John Derwart's specialty?
- John Derwart is listed in the NPPES registry with a primary specialty of Marriage & Family Therapist (Behavioral Health & Social Service Providers).
- Where is John Derwart located?
- John Derwart's practice location on file with NPPES is 11303 Wilshire Blvd Bldg 116, Los Angeles, CA 90025-5069.
- What is John Derwart's phone number?
- The practice phone number listed in the NPPES registry for John Derwart is (310) 914-4045.
- Is John Derwart's NPI active?
- Yes — John Derwart's NPI (1003345968) is active in the NPPES registry as of the last update on 2022-07-21.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.