Derek Washington, PH.D.
NPI 1821420316 · Marriage & Family Therapist · Stockton, CA
Derek Washington, PH.D. is a Marriage & Family Therapist provider in Stockton, CA (NPI 1821420316).
Provider details
- NPI number
- 1821420316
- Entity type
- Individual
- Primary specialty
- Marriage & Family TherapistBehavioral Health & Social Service Providers
- Credential
- PH.D.
- Sex
- Male
- Sole proprietor
- Yes
- License
- MFT4753 (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
12 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
- 2013-08-06
- Last updated
- 2013-08-06
Frequently asked questions
- What is Derek Washington's NPI number?
- Derek Washington's National Provider Identifier (NPI) is 1821420316, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Derek Washington's specialty?
- Derek Washington is listed in the NPPES registry with a primary specialty of Marriage & Family Therapist (Behavioral Health & Social Service Providers).
- Where is Derek Washington located?
- Derek Washington's practice location on file with NPPES is 1341 W Robinhood Dr Ste B2, Stockton, CA 95207-5517.
- What is Derek Washington's phone number?
- The practice phone number listed in the NPPES registry for Derek Washington is (209) 957-9001.
- Is Derek Washington's NPI active?
- Yes — Derek Washington's NPI (1821420316) is active in the NPPES registry as of the last update on 2013-08-06.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.