Leah Southwick, LMFT
NPI 1356475735 · Marriage & Family Therapist · Los Alamitos, CA
Leah Southwick, LMFT is a Marriage & Family Therapist provider in Los Alamitos, CA (NPI 1356475735).
Provider details
- NPI number
- 1356475735
- Entity type
- Individual
- Primary specialty
- Marriage & Family TherapistBehavioral Health & Social Service Providers
- Credential
- LMFT
- Sex
- Female
- Sole proprietor
- Yes
- License
- IMF 47510 (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
- 2007-03-15
- Last updated
- 2021-08-19
- Certified
- 2021-08-19
Frequently asked questions
- What is Leah Southwick's NPI number?
- Leah Southwick's National Provider Identifier (NPI) is 1356475735, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Leah Southwick's specialty?
- Leah Southwick is listed in the NPPES registry with a primary specialty of Marriage & Family Therapist (Behavioral Health & Social Service Providers).
- Where is Leah Southwick located?
- Leah Southwick's practice location on file with NPPES is 12021 Old Mill Rd, Los Alamitos, CA 90720-4322.
- What is Leah Southwick's phone number?
- The practice phone number listed in the NPPES registry for Leah Southwick is (310) 409-7907.
- Is Leah Southwick's NPI active?
- Yes — Leah Southwick's NPI (1356475735) is active in the NPPES registry as of the last update on 2021-08-19.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.