Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Mr. Marc William Clanton

Clinical Social Worker in Roseville, CA · enumerated 2015.

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

National Provider Identifier

1275909830

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Registry record

Entity type Individual (Type 1)

Name Mr. Marc William Clanton

Sex Male

Practice address 1382 Blue Oaks Blvd Ste 213, Roseville, CA, 95678

Phone (877) 412-8031

Enumeration date Aug 18, 2015

Last updated in NPPES Jan 8, 2026

Taxonomy & licenses

1041C0700X Clinical Social Worker Behavioral Health & Social Service Providers · License 114013 (CA) Primary

104100000X Social Worker Behavioral Health & Social Service Providers · License 82206 (CA) Secondary

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 Marc Clanton?

Marc Clanton is registered in NPPES with the primary taxonomy of Clinical 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 2026-01-08.