Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Kelli Castelan

Behavior Technician in Petaluma, CA · enumerated 2026.

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

National Provider Identifier

1598682817

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Registry record

Entity type Individual (Type 1)

Name Kelli Castelan

Sex Female

Practice address 1425 N Mcdowell Blvd Ste 206, Petaluma, CA, 94954

Phone (707) 241-3929

Enumeration date Jun 30, 2026

Last updated in NPPES Jun 30, 2026

Taxonomy & licenses

106S00000X Behavior Technician 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

Is NPI 1598682817 active?

Yes, as of the latest NPPES snapshot, NPI 1598682817 is active (record last updated 2026-06-30).

How do I verify Kelli Castelan's NPI record?

Cross-check NPI 1598682817 against the official CMS registry at npiregistry.cms.hhs.gov. This page mirrors the same public NPPES data with a monthly snapshot.

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2026-06-30.