NPI Portal NPI Lookup & Verification

Allergy & Immunology in Norwalk, CT

10 active Allergy & Immunology providers practice in Norwalk, Connecticut according to the latest NPPES snapshot. Profiles include the NPI number, taxonomy code, license state, and practice address.

Allergy & Immunology providers in Norwalk, CT
NPI Name Type Specialty Location
1467436733 Agnieszka Matczuk Individual Allergy & Immunology Physician Norwalk, CT
1619115409 Allergy Center of Connecticut, PC Organization Allergy & Immunology Physician Norwalk, CT
1881744456 Aymeric Louit Individual Allergy & Immunology Physician Norwalk, CT
1083705891 Fairfield County Allergy Asthma & Immunology Associates PC Organization Allergy & Immunology Physician Norwalk, CT
1780775577 Joseph Sproviero Individual Allergy & Immunology Physician Norwalk, CT
1215383864 Kaoru Harada Individual Allergy & Immunology Physician Norwalk, CT
1447341243 Mark Litchman Individual Allergy & Immunology Physician Norwalk, CT
1538100557 Michael Lewin Individual Allergy & Immunology Physician Norwalk, CT
1881785673 Mitchell Lester Individual Allergy Physician Norwalk, CT
1386700854 Philip Hemmers Individual Allergy & Immunology Physician Norwalk, CT

Frequently asked questions

How many Allergy & Immunology providers are in Norwalk, CT?
The latest NPPES snapshot lists 10 active Allergy & Immunology providers with a practice address in Norwalk, Connecticut.
How do I check a Allergy & Immunology provider's NPI in Norwalk?
Open a profile below to see the NPI number, taxonomy code, and practice address, then verify against the official NPPES registry — every profile links directly to the CMS record.

Source: CMS NPPES (public data). Snapshot 2026-07-10.