Diana Hirning-Johnson, MFT
NPI 1639409725 · Marriage & Family Therapist · Davis, CA
Diana Hirning-Johnson, MFT is a Marriage & Family Therapist provider in Davis, CA (NPI 1639409725).
Provider details
- NPI number
- 1639409725
- Entity type
- Individual
- Primary specialty
- Marriage & Family TherapistBehavioral Health & Social Service Providers
- Credential
- MFT
- Sex
- Female
- Sole proprietor
- Yes
- License
- MFC41611 (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
16 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
- 2010-01-12
- Last updated
- 2010-01-12
Frequently asked questions
- What is Diana Hirning-Johnson's NPI number?
- Diana Hirning-Johnson's National Provider Identifier (NPI) is 1639409725, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Diana Hirning-Johnson's specialty?
- Diana Hirning-Johnson is listed in the NPPES registry with a primary specialty of Marriage & Family Therapist (Behavioral Health & Social Service Providers).
- Where is Diana Hirning-Johnson located?
- Diana Hirning-Johnson's practice location on file with NPPES is 433 F St, Davis, CA 95616-4111.
- What is Diana Hirning-Johnson's phone number?
- The practice phone number listed in the NPPES registry for Diana Hirning-Johnson is (530) 304-0146.
- Is Diana Hirning-Johnson's NPI active?
- Yes — Diana Hirning-Johnson's NPI (1639409725) is active in the NPPES registry as of the last update on 2010-01-12.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.