Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Charlie Wittke

Behavior Analyst in San Mateo, CA · enumerated 2020.

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

National Provider Identifier

1144855560

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Registry record

Entity type Individual (Type 1)

Name Charlie Wittke

Sex Male

Practice address 800 S Claremont St Ste 108, San Mateo, CA, 94402

Phone (650) 281-2631

Enumeration date Mar 5, 2020

Last updated in NPPES Mar 5, 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

What specialty is Charlie Wittke?

Charlie Wittke 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.

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.

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2020-03-05.