Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Margaret O'Donoghue, MD

Neurology Physician in Middletown, CT · enumerated 2006.

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

National Provider Identifier

1871608158

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Registry record

Entity type Individual (Type 1)

Name Margaret O'Donoghue

Credential MD

Sex Female

Practice address 21 Crescent St, Middletown, CT, 06457

Phone (860) 344-6394

Fax (860) 344-6748

Enumeration date Aug 20, 2006

Last updated in NPPES Nov 16, 2007

Taxonomy & licenses

2084N0400X Neurology Physician Allopathic & Osteopathic Physicians · License 039549 (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
039549	Other	CT	CT LICENSE #

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.

Read the full guide → Validate an NPI →

Frequently asked questions

What specialty is Margaret O'Donoghue?

Margaret O'Donoghue is registered in NPPES with the primary taxonomy of Neurology Physician. The taxonomy code describes the provider's classification and area of specialization for claims and credentialing.

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.

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2007-11-16.