Leah Brennan, LMFT, CADC
NPI 1134456064 · Marriage & Family Therapist · Lincolnwood, IL
Leah Brennan, LMFT, CADC is a Marriage & Family Therapist provider in Lincolnwood, IL (NPI 1134456064).
Provider details
- NPI number
- 1134456064
- Entity type
- Individual
- Primary specialty
- Marriage & Family TherapistBehavioral Health & Social Service Providers
- Credential
- LMFT, CADC
- Sex
- Female
- Sole proprietor
- Yes
- License
- 166000775 (IL)
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
16 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
- 2009-11-13
- Last updated
- 2011-05-12
Frequently asked questions
- What is Leah Brennan's NPI number?
- Leah Brennan's National Provider Identifier (NPI) is 1134456064, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Leah Brennan's specialty?
- Leah Brennan is listed in the NPPES registry with a primary specialty of Marriage & Family Therapist (Behavioral Health & Social Service Providers).
- Where is Leah Brennan located?
- Leah Brennan's practice location on file with NPPES is 6834 N. Lowell Ave., Lincolnwood, IL 60712.
- What is Leah Brennan's phone number?
- The practice phone number listed in the NPPES registry for Leah Brennan is (312) 953-0380.
- Is Leah Brennan's NPI active?
- Yes — Leah Brennan's NPI (1134456064) is active in the NPPES registry as of the last update on 2011-05-12.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.