Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Ms. Marta Marie Nielsen, MSW

Social Worker in Templeton, CA · enumerated 2007.

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

National Provider Identifier

1720138530

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Registry record

Entity type Individual (Type 1)

Name Ms. Marta Marie Nielsen

Credential MSW

Sex Female

Practice address 71 N. Main St., Templeton, CA, 93465

Phone (805) 434-2449

Fax (805) 434-3839

Enumeration date Jan 12, 2007

Last updated in NPPES Jul 8, 2007

Taxonomy & licenses

104100000X Social Worker Behavioral Health & Social Service Providers · License ASW 21154 (CA) 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 Marta Nielsen?

Marta Nielsen 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 2007-07-08.