Colter Diehl, MFTI
NPI 1447620117 · Marriage & Family Therapist · Napa, CA
Enrolled with Medicare as Practitioner - Marriage and Family Therapist · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Colter Diehl, MFTI is a Marriage & Family Therapist provider in Napa, CA (NPI 1447620117).
Provider details
- NPI number
- 1447620117
- Entity type
- Individual
- Primary specialty
- Marriage & Family TherapistBehavioral Health & Social Service Providers
- Credential
- MFTI
- Sex
- Male
- Sole proprietor
- No
- License
- 85257 (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
10 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
- 2015-10-06
- Last updated
- 2015-10-06
Frequently asked questions
- What is Colter Diehl's NPI number?
- Colter Diehl's National Provider Identifier (NPI) is 1447620117, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Colter Diehl's specialty?
- Colter Diehl is listed in the NPPES registry with a primary specialty of Marriage & Family Therapist (Behavioral Health & Social Service Providers).
- Where is Colter Diehl located?
- Colter Diehl's practice location on file with NPPES is 1100 Lincoln Ave, Napa, CA 94558-4900.
- What is Colter Diehl's phone number?
- The practice phone number listed in the NPPES registry for Colter Diehl is (707) 255-3718.
- Does Colter Diehl accept Medicare?
- Colter Diehl is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Colter Diehl's NPI active?
- Yes — Colter Diehl's NPI (1447620117) is active in the NPPES registry as of the last update on 2015-10-06.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.