Christine Duncan, D.C.

Christine Duncan is a Nutrition Chiropractor provider (Chiropractor) practicing in Sioux Falls, SD, registered in the NPPES registry with NPI 1437560521 since 2014. The credential DC stands for Doctor of Chiropractic. Practices at Lanpher Chiropractic (listed at the same practice address in NPPES).

✓ Active NPI ✓ Valid NPI checksum

NPI	1437560521
Entity type	Individual (Type 1)
Name	Christine Duncan
Credential	D.C.
Sex	Female
Practice address	506 N SYCAMORE AVE, Sioux Falls, SD, 57110
Phone	6053348073
Fax	6053343752
Enumeration date	2014-05-12
Last updated in NPPES	2014-05-12

Taxonomy & licenses

Taxonomy code	Specialty	Primary	License	State
111NN1001X	Nutrition Chiropractor	Primary	1256	SD

DC — Doctor of Chiropractic: A licensed chiropractor focusing on musculoskeletal and nervous system disorders. About the DC credential

Copy-ready billing details

Provider: Christine Duncan, D.C.
NPI: 1437560521
Taxonomy: 111NN1001X (Nutrition Chiropractor)
Address: 506 N SYCAMORE AVE, Sioux Falls, SD, 57110

Other providers at this practice address

NPI	Name	Type	Specialty	Location
1407834419	Lanpher Chiropractic	Organization	Chiropractor	Sioux Falls, SD
1366416323	Robin Lanpher	Individual	Chiropractor	Sioux Falls, SD
1689446684	Addison Freybler	Individual	Chiropractor	Sioux Falls, SD

Verify this record

Cross-check NPI 1437560521 against the authoritative CMS record: view Christine Duncan on the official NPPES registry .

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 or validate an NPI number.

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 Christine Duncan?

Christine Duncan is registered in NPPES with the primary taxonomy of Nutrition Chiropractor. The taxonomy code describes the provider's classification and area of specialization for claims and credentialing.

Source: CMS NPPES (public data). Snapshot 2026-07-11. Provider record last updated 2014-05-12.