Diane Royal, MFT
NPI 1568674000 · Marriage & Family Therapist · Castro Valley, CA
Diane Royal, MFT is a Marriage & Family Therapist provider in Castro Valley, CA (NPI 1568674000).
Provider details
- NPI number
- 1568674000
- Entity type
- Individual
- Primary specialty
- Marriage & Family TherapistBehavioral Health & Social Service Providers
- Credential
- MFT
- Sex
- Female
- Sole proprietor
- Yes
- License
- 43644 (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
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
- 2007-05-04
- Last updated
- 2008-11-13
Frequently asked questions
- What is Diane Royal's NPI number?
- Diane Royal's National Provider Identifier (NPI) is 1568674000, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Diane Royal's specialty?
- Diane Royal is listed in the NPPES registry with a primary specialty of Marriage & Family Therapist (Behavioral Health & Social Service Providers).
- Where is Diane Royal located?
- Diane Royal's practice location on file with NPPES is 20284 Redwood Rd, Castro Valley, CA 94546-4312.
- What is Diane Royal's phone number?
- The practice phone number listed in the NPPES registry for Diane Royal is (510) 512-2463.
- Is Diane Royal's NPI active?
- Yes — Diane Royal's NPI (1568674000) is active in the NPPES registry as of the last update on 2008-11-13.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.