Leonard Brennan, DMD
NPI 1588844724 · General Practice Dentistry · Portland, ME
Enrolled with Medicare as Order and Referring Only - Dentist · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Leonard Brennan, DMD is a General Practice Dentistry provider in Portland, ME (NPI 1588844724).
Provider details
- NPI number
- 1588844724
- Entity type
- Individual
- Primary specialty
- General Practice DentistryDental Providers
- Credential
- DMD
- Sex
- Male
- Sole proprietor
- Yes
- License
- 2905 (ME)
Specialties & taxonomies
Dental Providers
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure38% of score
18 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
- 2007-11-05
- Last updated
- 2007-11-05
Frequently asked questions
- What is Leonard Brennan's NPI number?
- Leonard Brennan's National Provider Identifier (NPI) is 1588844724, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Leonard Brennan's specialty?
- Leonard Brennan is listed in the NPPES registry with a primary specialty of General Practice Dentistry (Dental Providers).
- Where is Leonard Brennan located?
- Leonard Brennan's practice location on file with NPPES is 1250 Congress St, Portland, ME 04102-2135.
- What is Leonard Brennan's phone number?
- The practice phone number listed in the NPPES registry for Leonard Brennan is (207) 773-2446.
- Does Leonard Brennan accept Medicare?
- Leonard Brennan is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Leonard Brennan's NPI active?
- Yes — Leonard Brennan's NPI (1588844724) is active in the NPPES registry as of the last update on 2007-11-05.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.