Joanna Horowitz, MFT
NPI 1356470843 · Mental Health Counselor · Claremont, CA
Joanna Horowitz, MFT is a Mental Health Counselor provider in Claremont, CA (NPI 1356470843).
Provider details
- NPI number
- 1356470843
- Entity type
- Individual
- Primary specialty
- Mental Health CounselorBehavioral Health & Social Service Providers
- Credential
- MFT
- Sex
- Female
- Sole proprietor
- Yes
- License
- MFC17219 (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
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
- 2007-03-02
- Last updated
- 2007-07-08
Frequently asked questions
- What is Joanna Horowitz's NPI number?
- Joanna Horowitz's National Provider Identifier (NPI) is 1356470843, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Joanna Horowitz's specialty?
- Joanna Horowitz is listed in the NPPES registry with a primary specialty of Mental Health Counselor (Behavioral Health & Social Service Providers).
- Where is Joanna Horowitz located?
- Joanna Horowitz's practice location on file with NPPES is 428 Harrison Ave, Claremont, CA 91711-4605.
- What is Joanna Horowitz's phone number?
- The practice phone number listed in the NPPES registry for Joanna Horowitz is (909) 625-5506.
- Is Joanna Horowitz's NPI active?
- Yes — Joanna Horowitz's NPI (1356470843) is active in the NPPES registry as of the last update on 2007-07-08.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.