Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Marina Maryssa Sierras

Behavior Analyst in Santa Clara, CA · enumerated 2019.

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

National Provider Identifier

1750855987

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Registry record

Entity type Individual (Type 1)

Name Marina Maryssa Sierras

Sex Female

Practice address 1171 Homestead Rd Ste 250, Santa Clara, CA, 95050

Phone (408) 512-9920

Enumeration date Jan 22, 2019

Last updated in NPPES Jan 22, 2019

Taxonomy & licenses

103K00000X Behavior Analyst Behavioral Health & Social Service Providers 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 Marina Sierras practice?

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

What is the NPI number for Marina Sierras?

The National Provider Identifier (NPI) for Marina Sierras is 1750855987, 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 2019-01-22.