Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Margaret Whelan, MD

Diagnostic Radiology Physician in Riverhead, NY · enumerated 2006.

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

National Provider Identifier

1427061126

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Registry record

Entity type Individual (Type 1)

Name Margaret Whelan

Credential MD

Sex Female

Practice address 1333 Roanoke Ave, Riverhead, NY, 11901

Phone (631) 727-2755

Fax (631) 208-9521

Enumeration date Aug 14, 2006

Last updated in NPPES May 16, 2008

Taxonomy & licenses

2085R0202X Diagnostic Radiology Physician Allopathic & Osteopathic Physicians · License 120017 (NY) 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
WEU091	Other	NY	MEDICARE GROUP HR
00428551	Medicaid	NY	-
W11401	Other	NY	BC/BS
CF3402	Other	NY	RR MEDICARE
W22111	Other	NY	MEDICARE GROUP SHR

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 Margaret Whelan?

The National Provider Identifier (NPI) for Margaret Whelan is 1427061126, a Type 1 (individual) record in the CMS NPPES registry.

Where does Margaret Whelan practice?

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

Other providers at this practice address

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2008-05-16.