Type 2 · Organization ✓ Active NPI ✓ Valid NPI checksum

Siouxland Adult Medicine, Pllc

Specialist in Sioux City, IA · enumerated 2008 · authorized official Mark Carlson, Internal Medicine.

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

National Provider Identifier

1295991677

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Registry record

Entity type Organization (Type 2)

Legal business name Siouxland Adult Medicine, Pllc

Practice address 2800 Pierce St, Suite 410, Sioux City, IA, 51104

Phone (712) 234-1005

Enumeration date Aug 5, 2008

Last updated in NPPES Aug 5, 2008

Taxonomy & classification

174400000X Specialist Other Service Providers · License 127854 (IA) Primary

Authorized official

Name Mark Carlson

Title Internal Medicine

Phone (712) 234-1005

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 current is this record?

Data comes from the CMS NPPES public dissemination file; this record was last updated in NPPES on 2008-08-05. Verify at npiregistry.cms.hhs.gov.

Where is Siouxland Adult Medicine, Pllc located?

The practice location on file with NPPES is in Sioux City, IA.

Providers at this address

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2008-08-05.