IndividualActive
Mary Lou Brennan, MS
NPI 1215290903 · Specialist · Sayville, NY
Mary Lou Brennan, MS is a Specialist provider in Sayville, NY (NPI 1215290903).
Provider details
- NPI number
- 1215290903
- Entity type
- Individual
- Primary specialty
- SpecialistOther Service Providers
- Credential
- MS
- Sex
- Female
- Sole proprietor
- No
Specialties & taxonomies
Other Service Providers
Profile Score
Established profile(73/100 index)
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure38% of score
14 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
335 Johnson Ave
Sayville, NY 11782-1143
Phone: (631) 589-8060
Street-level locationGet directions
Mailing address
150 E Nassau St
Islip Terrace, NY 11752-2908
Registry dates
- Enumerated
- 2012-06-19
- Last updated
- 2012-06-19
Frequently asked questions
- What is Mary Lou Brennan's NPI number?
- Mary Lou Brennan's National Provider Identifier (NPI) is 1215290903, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Mary Lou Brennan's specialty?
- Mary Lou Brennan is listed in the NPPES registry with a primary specialty of Specialist (Other Service Providers).
- Where is Mary Lou Brennan located?
- Mary Lou Brennan's practice location on file with NPPES is 335 Johnson Ave, Sayville, NY 11782-1143.
- What is Mary Lou Brennan's phone number?
- The practice phone number listed in the NPPES registry for Mary Lou Brennan is (631) 589-8060.
- Is Mary Lou Brennan's NPI active?
- Yes — Mary Lou Brennan's NPI (1215290903) is active in the NPPES registry as of the last update on 2012-06-19.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.