Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Elizabeth C. Riordan, M.D.

Surgery Physician in Meriden, CT · enumerated 2006.

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

National Provider Identifier

1528078995

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Registry record

Entity type Individual (Type 1)

Name Elizabeth C. Riordan

Credential M.D.

Sex Female

Practice address 455 Lewis Ave, Suite 208, Meriden, CT, 06451

Phone (203) 238-2691

Fax (203) 235-3128

Enumeration date Aug 9, 2006

Last updated in NPPES May 28, 2008

Taxonomy & licenses

208600000X Surgery Physician Allopathic & Osteopathic Physicians · License 045438 (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
01837214	Medicaid	NY	-
010045438CT02	Other	CT	ANTHEM BCBS

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

Is this the official NPI registry?

No. NPI Portal is a private site built on public CMS NPPES data. The official registry is npiregistry.cms.hhs.gov, operated by CMS.

What specialty is Elizabeth Riordan?

Elizabeth Riordan is registered in NPPES with the primary taxonomy of Surgery Physician. The taxonomy code describes the provider's classification and area of specialization for claims and credentialing.

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2008-05-28.