Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Mrs. Martha Viviana Sinclair-West

Social Worker in Sacramento, CA · enumerated 2013.

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

National Provider Identifier

1033542519

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Registry record

Entity type Individual (Type 1)

Name Mrs. Martha Viviana Sinclair-West

Sex Female

Practice address 3870 Rosin Ct, Suite 130, Sacramento, CA, 95834

Phone (916) 363-1553

Enumeration date Aug 19, 2013

Last updated in NPPES Jan 11, 2017

Taxonomy & licenses

104100000X Social Worker Behavioral Health & Social Service Providers · License 75038 (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.

Read the full guide → Validate an NPI →

Frequently asked questions

Where does Martha Sinclair-West practice?

The practice location on file with NPPES is in Sacramento, CA. Providers can have multiple locations; NPPES lists the primary practice address.

What is the NPI number for Martha Sinclair-West?

The National Provider Identifier (NPI) for Martha Sinclair-West is 1033542519, a Type 1 (individual) record in the CMS NPPES registry.

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2017-01-11.