Jack Gershfeld, LMFT
NPI 1639693971 · Marriage & Family Therapist · Fullerton, CA
Jack Gershfeld, LMFT is a Marriage & Family Therapist provider in Fullerton, CA (NPI 1639693971).
Provider details
- NPI number
- 1639693971
- Entity type
- Individual
- Primary specialty
- Marriage & Family TherapistBehavioral Health & Social Service Providers
- Credential
- LMFT
- Sex
- Male
- Sole proprietor
- Yes
- License
- LMFT94477 (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
8 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
- 2017-07-28
- Last updated
- 2023-06-13
- Certified
- 2023-06-13
Frequently asked questions
- What is Jack Gershfeld's NPI number?
- Jack Gershfeld's National Provider Identifier (NPI) is 1639693971, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Jack Gershfeld's specialty?
- Jack Gershfeld is listed in the NPPES registry with a primary specialty of Marriage & Family Therapist (Behavioral Health & Social Service Providers).
- Where is Jack Gershfeld located?
- Jack Gershfeld's practice location on file with NPPES is 680 Langsdorf Dr Ste 108, Fullerton, CA 92831-3702.
- What is Jack Gershfeld's phone number?
- The practice phone number listed in the NPPES registry for Jack Gershfeld is (714) 725-7121.
- Is Jack Gershfeld's NPI active?
- Yes — Jack Gershfeld's NPI (1639693971) is active in the NPPES registry as of the last update on 2023-06-13.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.