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Cristina Sierra

Peer Specialist in Los Angeles, CA · enumerated 2019 · practices at Hathaway-Sycamores Child and Family Services.

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

National Provider Identifier

1740825827

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Registry record

Entity type Individual (Type 1)
Name Cristina Sierra
Sex Female
Practice address 840 N Avenue 66, Los Angeles, CA, 90042
Phone (626) 395-7100
Enumeration date Nov 12, 2019
Last updated in NPPES Apr 29, 2026

Taxonomy & licenses

172V00000X Community Health Worker Other Service Providers Secondary
175T00000X Peer Specialist Other Service Providers Secondary
175T00000X Peer Specialist Other Service Providers · License MPSS-PZITYV (CA) Primary
175T00000X Peer Specialist Other Service Providers 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.

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Frequently asked questions

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.
What specialty is Cristina Sierra?
Cristina Sierra is registered in NPPES with the primary taxonomy of Peer Specialist. The taxonomy code describes the provider's classification and area of specialization for claims and credentialing.

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2026-04-29.