Grant Zweifel, M.F.T.
NPI 1669539516 · Marriage & Family Therapist · Visalia, CA
Grant Zweifel, M.F.T. is a Marriage & Family Therapist provider in Visalia, CA (NPI 1669539516).
Provider details
- NPI number
- 1669539516
- Entity type
- Individual
- Primary specialty
- Marriage & Family TherapistBehavioral Health & Social Service Providers
- Credential
- M.F.T.
- Sex
- Male
- Sole proprietor
- Yes
- License
- MFC 37910 (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
2 documented practice locations
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
Additional practice locations (1)
- 204 N Floral St Ste aVisalia, CA 93291-4957Phone: (559) 739-1944Fax: (559) 739-2944
Registry dates
- Enumerated
- 2007-01-02
- Last updated
- 2020-09-11
- Certified
- 2020-09-11
Frequently asked questions
- What is Grant Zweifel's NPI number?
- Grant Zweifel's National Provider Identifier (NPI) is 1669539516, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Grant Zweifel's specialty?
- Grant Zweifel is listed in the NPPES registry with a primary specialty of Marriage & Family Therapist (Behavioral Health & Social Service Providers).
- Where is Grant Zweifel located?
- Grant Zweifel's practice location on file with NPPES is 520 E Tulare Ave, Visalia, CA 93292-3629.
- What is Grant Zweifel's phone number?
- The practice phone number listed in the NPPES registry for Grant Zweifel is (559) 623-0900.
- Is Grant Zweifel's NPI active?
- Yes — Grant Zweifel's NPI (1669539516) is active in the NPPES registry as of the last update on 2020-09-11.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.