Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Marguerite Rao Dillaway, M.D.

Pediatric Adolescent Medicine Physician in Hamden, CT · enumerated 2006.

Data current as of Jul 13, 2026 · sourced from CMS NPPES

National Provider Identifier

1821059072

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Registry record

Entity type Individual (Type 1)

Name Marguerite Rao Dillaway

Credential M.D.

Sex Female

Practice address 2200 Whitney Ave, Suite 240, Hamden, CT, 06518

Phone (203) 287-5400

Fax (203) 281-3001

Enumeration date Mar 29, 2006

Last updated in NPPES Nov 25, 2015

Taxonomy & licenses

2080A0000X Pediatric Adolescent Medicine Physician Allopathic & Osteopathic Physicians · License 026292 (CT) Primary

MD · Doctor of Medicine: A physician who completed medical school (allopathic medicine), residency training, and state licensure. About the MD credential

Other identifiers

Identifier	Type	State	Issuer
001262922	Medicaid	CT	-
1249063	Other	CT	UNITED HEALTHCARE
NHP224	Other	CT	OXFORD
726292	Other	CT	CONNECTICARE
010026292201CT02	Other	CT	ANTHEM
0Q1595	Other	CT	HEALTHNET

What is an NPI number?

A National Provider Identifier (NPI) is a unique 10-digit number that CMS assigns to every U.S. healthcare provider and organization under HIPAA. Type 1 NPIs identify individual providers; Type 2 NPIs identify organizations. The NPI appears on insurance claims, prescriptions, and credentialing paperwork, and never changes, even if the provider moves or changes specialty.

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Frequently asked questions

What is the NPI number for Marguerite Rao Dillaway?

The National Provider Identifier (NPI) for Marguerite Rao Dillaway is 1821059072, a Type 1 (individual) record in the CMS NPPES registry.

Where does Marguerite Rao Dillaway practice?

The practice location on file with NPPES is in Hamden, CT. Providers can have multiple locations; NPPES lists the primary practice address.

Other providers at this practice address

Browse all →

Anesthesia Services of Meriden PC Anesthesiology Physician · Hamden, CT NPI 1750382156 Jerrold Kaplan Physical Medicine & Rehabilitation Physician · Hamden, CT NPI 1568455137 Renu Bazaz-Kapoor Internal Medicine Physician · Hamden, CT NPI 1427045954 Ricardo Cordido Cardiovascular Disease Physician · Hamden, CT NPI 1003806456 Karin Augur Medical Physician Assistant · Hamden, CT NPI 1588654933 Marian Vulpe Cardiovascular Disease Physician · Hamden, CT NPI 1013907476 Susan Gobel Anatomic Pathology & Clinical Pathology Physician · Hamden, CT NPI 1730160987 Ronald Vender Gastroenterology Physician · Hamden, CT NPI 1205817178

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2015-11-25.