Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Mark Steven Nelson, LMSW

Social Worker in Burley, ID · enumerated 2012.

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

National Provider Identifier

1861765992

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Registry record

Entity type Individual (Type 1)

Name Mark Steven Nelson

Credential LMSW

Sex Male

Practice address 2311 Park Ave, Unit 2 Suite 8, Burley, ID, 83318

Phone (208) 878-3350

Enumeration date Feb 21, 2012

Last updated in NPPES Feb 21, 2012

Taxonomy & licenses

104100000X Social Worker Behavioral Health & Social Service Providers · License LMSW-31713 (ID) Primary

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 specialty is Mark Nelson?

Mark Nelson is registered in NPPES with the primary taxonomy of Social Worker. 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.

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2012-02-21.