Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Mr. Jacob Alexander Illish

Behavior Technician in Danville, CA · enumerated 2020.

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

National Provider Identifier

1861001562

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Registry record

Entity type Individual (Type 1)

Name Mr. Jacob Alexander Illish

Sex Male

Practice address 4125 Blackhawk Plaza Cir Ste 230, Danville, CA, 94506

Phone (844) 262-8466

Enumeration date Jul 28, 2020

Last updated in NPPES Jul 28, 2020

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.

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Frequently asked questions

How do I verify Jacob Illish's NPI record?

Cross-check NPI 1861001562 against the official CMS registry at npiregistry.cms.hhs.gov. This page mirrors the same public NPPES data with a monthly snapshot.

Is NPI 1861001562 active?

Yes, as of the latest NPPES snapshot, NPI 1861001562 is active (record last updated 2020-07-28).

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2020-07-28.