Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Mr. William Jefferson Angel

Behavior Analyst in Costa Mesa, CA · enumerated 2020.

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

National Provider Identifier

1720612609

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Registry record

Entity type Individual (Type 1)

Name Mr. William Jefferson Angel

Sex Male

Practice address 3186 Airway Ave, Costa Mesa, CA, 92626

Phone (714) 881-0427

Fax (714) 327-0673

Enumeration date Feb 28, 2020

Last updated in NPPES Feb 28, 2020

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 William Angel practice?

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

What is the NPI number for William Angel?

The National Provider Identifier (NPI) for William Angel is 1720612609, 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 2020-02-28.