Margaret Brennan
NPI 1851791958 · Developmental Therapist · Lisle, IL
Margaret Brennan is a Developmental Therapist provider in Lisle, IL (NPI 1851791958).
Provider details
- NPI number
- 1851791958
- Entity type
- Individual
- Primary specialty
- Developmental TherapistRespiratory, Developmental, Rehabilitative and Restorative Service Providers
- Sex
- Female
- Sole proprietor
- Yes
Specialties & taxonomies
Respiratory, Developmental, Rehabilitative and Restorative Service Providers
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure38% of score
11 yrs in NPPES registry
- Profile completeness38% of score
83% 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
- 2014-08-26
- Last updated
- 2014-08-26
Frequently asked questions
- What is Margaret Brennan's NPI number?
- Margaret Brennan's National Provider Identifier (NPI) is 1851791958, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Margaret Brennan's specialty?
- Margaret Brennan is listed in the NPPES registry with a primary specialty of Developmental Therapist (Respiratory, Developmental, Rehabilitative and Restorative Service Providers).
- Where is Margaret Brennan located?
- Margaret Brennan's practice location on file with NPPES is 5825 Iris Ln, Lisle, IL 60532-2731.
- What is Margaret Brennan's phone number?
- The practice phone number listed in the NPPES registry for Margaret Brennan is (630) 988-5609.
- Is Margaret Brennan's NPI active?
- Yes — Margaret Brennan's NPI (1851791958) is active in the NPPES registry as of the last update on 2014-08-26.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.