Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Brett Follett, PSY.D

Psychologist in Appleton, WI · enumerated 2018.

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

National Provider Identifier

1639673940

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Registry record

Entity type Individual (Type 1)

Name Brett Follett

Credential PSY.D

Sex Male

Practice address 401 S. Elm St., Appleton, WI, 54911

Phone (920) 832-5270

Fax (920) 832-5488

Enumeration date Mar 21, 2018

Last updated in NPPES Mar 21, 2018

Taxonomy & licenses

103T00000X Psychologist Behavioral Health & Social Service Providers · License PSY29541 (CA) Secondary

103T00000X Psychologist Behavioral Health & Social Service Providers · License 3552-57 (WI) Primary

PSYD · Doctor of Psychology: A clinical doctorate in psychology focused on professional practice. About the PSYD credential

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

How do I verify Brett Follett's NPI record?

Cross-check NPI 1639673940 against the official CMS registry at npiregistry.cms.hhs.gov. This page mirrors the same public NPPES data with a monthly snapshot.

Is NPI 1639673940 active?

Yes, as of the latest NPPES snapshot, NPI 1639673940 is active (record last updated 2018-03-21).

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2018-03-21.