Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Mrs. Katherine Wamback Stewart, BCBA

Behavior Analyst in Fontana, CA · enumerated 2017.

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

National Provider Identifier

1457883233

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Registry record

Entity type Individual (Type 1)

Name Mrs. Katherine Wamback Stewart

Credential BCBA

Sex Female

Practice address 6949 Dew Point Way, Fontana, CA, 92336

Phone (909) 317-8499

Enumeration date Mar 30, 2017

Last updated in NPPES Feb 18, 2025

Taxonomy & licenses

106E00000X Assistant Behavior Analyst Behavioral Health & Social Service Providers · License 0-16-7454 (CA) Secondary

103K00000X Behavior Analyst Behavioral Health & Social Service Providers · License 1-17-28577 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

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 Katherine Stewart?

Katherine Stewart is registered in NPPES with the primary taxonomy of Behavior Analyst. 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 2025-02-18.