William Riggs, MFT
NPI 1679768618 · Marriage & Family Therapist · Vallejo, CA
William Riggs, MFT is a Marriage & Family Therapist provider in Vallejo, CA (NPI 1679768618).
Provider details
- NPI number
- 1679768618
- Entity type
- Individual
- Primary specialty
- Marriage & Family TherapistBehavioral Health & Social Service Providers
- Credential
- MFT
- Sex
- Male
- Sole proprietor
- No
- License
- MFC33474 (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
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
- 2007-09-12
- Last updated
- 2007-09-12
Frequently asked questions
- What is William Riggs's NPI number?
- William Riggs's National Provider Identifier (NPI) is 1679768618, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is William Riggs's specialty?
- William Riggs is listed in the NPPES registry with a primary specialty of Marriage & Family Therapist (Behavioral Health & Social Service Providers).
- Where is William Riggs located?
- William Riggs's practice location on file with NPPES is 1027 Alabama St, Vallejo, CA 94590-4511.
- What is William Riggs's phone number?
- The practice phone number listed in the NPPES registry for William Riggs is (707) 558-1600.
- Is William Riggs's NPI active?
- Yes — William Riggs's NPI (1679768618) is active in the NPPES registry as of the last update on 2007-09-12.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.