Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Mr. Thomas Guerrein, AUD

Audiologist in Alpharetta, GA · enumerated 2011.

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

National Provider Identifier

1346524881

Verified

See something wrong? Report a correction

Registry record

Entity type Individual (Type 1)

Name Mr. Thomas Guerrein

Credential AUD

Sex Male

Practice address 2365 Old Milton Pkwy, Suite 300, Alpharetta, GA, 30009

Phone (770) 740-1860

Fax (678) 347-2104

Enumeration date Oct 3, 2011

Last updated in NPPES Dec 20, 2016

Taxonomy & licenses

231H00000X Audiologist Speech, Language and Hearing Service Providers · License 3883 (GA) Primary

AUD · Doctor of Audiology: A licensed audiologist diagnosing and treating hearing and balance disorders. About the AUD 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

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.

What specialty is Thomas Guerrein?

Thomas Guerrein is registered in NPPES with the primary taxonomy of Audiologist. The taxonomy code describes the provider's classification and area of specialization for claims and credentialing.

Other providers at this practice address

Browse all →

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2016-12-20.