Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Christine S. Halligan, MD

Rheumatology Physician in Sioux Falls, SD · enumerated 2006 · practices at Avera Mckennan.

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

National Provider Identifier

1871526962

Verified

See something wrong? Report a correction

Registry record

Entity type Individual (Type 1)

Name Christine S. Halligan

Credential MD

Sex Female

Practice address 6100 S Louise Ave Ste 1130, Sioux Falls, SD, 57108

Phone (605) 504-1600

Enumeration date Jul 9, 2006

Last updated in NPPES Oct 31, 2019

Taxonomy & licenses

207RR0500X Rheumatology Physician Allopathic & Osteopathic Physicians · License 5792 (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
6631280	Medicaid	SD	-
P00330192	Other	SD	RAILROAD MEDICARE
6631282	Medicaid	SD	-

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 Christine Halligan?

Christine Halligan is registered in NPPES with the primary taxonomy of Rheumatology 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.

Other providers at this practice address

Browse all →

Gregory Mumm Rheumatology Physician · Sioux Falls, SD NPI 1548228810 Kara Petersen Rheumatology Physician · Sioux Falls, SD NPI 1851328231 Joseph Fanciullo Rheumatology Physician · Sioux Falls, SD NPI 1437182516 Avera Mckennan Rheumatology Physician · Sioux Falls, SD NPI 1013177393 Jenna King-Sona Rheumatology Physician · Sioux Falls, SD NPI 1679864375 Amy Dix Nurse Practitioner · Sioux Falls, SD NPI 1023396900 Mark Vercel Rheumatology Physician · Sioux Falls, SD NPI 1386902450 Jessica Srstka Rheumatology Physician · Sioux Falls, SD NPI 1700229424

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2019-10-31.