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

Margaret Elizabeth Sweeney, MD

Individual provider Allergy & Immunology (Internal Medicine) Physician · NPI 1235211863

Margaret Elizabeth Sweeney, MD is an Allergy & Immunology (Internal Medicine) Physician in Norwalk, Connecticut. Practices as a sole proprietor. Licensed in Connecticut.

Licensed in
CT
In the registry since
2006
What do these letters mean?
MD — Doctor of Medicine
A physician who completed allopathic medical school.

See every abbreviation used in this directory →

Practice location Address checks out

148 E Ave Ste 1G1
Norwalk, CT 06851-5721
Phone: (203) 838-1588
Fax: (203) 838-1944
Show map & directions

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

Specialties & licences

Allergy & Immunology (Internal Medicine) Physician (primary) Taxonomy 207RA0201X · Licence 26804 (CT)

Record details

NPI number1235211863
Entity typeIndividual (Type 1)
GenderFemale
Credentials MD
Sole proprietorYes
NPI enumeratedOctober 20, 2006
Last updated in NPPESJuly 8, 2007