Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Sean C Halligan, MD

Interventional Cardiology Physician in Sioux Falls, SD · enumerated 2005.

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

National Provider Identifier

1174504658

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Registry record

Entity type Individual (Type 1)

Name Sean C Halligan

Credential MD

Sex Male

Practice address 4520 W 69th St, Sioux Falls, SD, 57108

Phone (605) 977-5000

Fax (605) 977-5377

Enumeration date Nov 10, 2005

Last updated in NPPES Oct 5, 2022

Taxonomy & licenses

207RC0000X Cardiovascular Disease Physician Allopathic & Osteopathic Physicians · License 44354 (WI) Secondary

207RC0000X Cardiovascular Disease Physician Allopathic & Osteopathic Physicians · License 5802 (SD) Secondary

207RI0011X Interventional Cardiology Physician Allopathic & Osteopathic Physicians · License 5802 (SD) 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
6005310	Medicaid	SD	-
931451031071	Other	-	PREFERRED ONE
1582791	Medicaid	IA	-
052817000	Medicaid	MN	-
165025	Other	-	UCARE
4994073	Other	-	IOWA BLUE SHIELD
4994073	Other	SD	SD 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

How do I verify Sean Halligan's NPI record?

Cross-check NPI 1174504658 against the official CMS registry at npiregistry.cms.hhs.gov. This page mirrors the same public NPPES data with a monthly snapshot.

Is NPI 1174504658 active?

Yes, as of the latest NPPES snapshot, NPI 1174504658 is active (record last updated 2022-10-05).

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2022-10-05.