Provider records sourced from NPPES (CMS National Plan & Provider Enumeration System). Data current as of August 10, 2026.

Dr. Leonard Joseph Brennan, DMD

Individual provider General Practice Dentistry · NPI 1588844724

Dr. Leonard Joseph Brennan, DMD is a General Practice Dentistry in Portland, Maine. Practices as a sole proprietor. Licensed in Maine.

Licensed in
ME
In the registry since
2007
What do these letters mean?
DMD — Doctor of Dental Medicine
A dentist. Identical training and licensing to a DDS.

See every abbreviation used in this directory →

Practice location Address checks out

1250 Congress St
Portland, ME 04102-2135
Phone: (207) 773-2446
Fax: (207) 773-4990
Show map & directions

Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

General Practice Dentistry (primary) Taxonomy 1223G0001X · Licence 2905 (ME)

Record details

NPI number1588844724
Entity typeIndividual (Type 1)
GenderMale
Credentials DMD
Sole proprietorYes
NPI enumeratedNovember 5, 2007
Last updated in NPPESNovember 5, 2007

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