Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum Sole proprietor

Dr. Thomas F Christl, AU.D.

Audiologist in North Chicago, IL · enumerated 2013.

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

National Provider Identifier

1669813267

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Registry record

Entity type Individual (Type 1)

Name Dr. Thomas F Christl

Credential AU.D.

Sex Male

Practice address North Chicago, IL, 60064

Phone (224) 610-3759

Enumeration date Jul 11, 2013

Last updated in NPPES Mar 5, 2020

Street address withheld: NPPES sole-proprietor addresses can be home addresses. See our data policy.

Taxonomy & licenses

231H00000X Audiologist Speech, Language and Hearing Service Providers 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

Where does Thomas Christl practice?

The practice location on file with NPPES is in North Chicago, IL. Providers can have multiple locations; NPPES lists the primary practice address.

What is the NPI number for Thomas Christl?

The National Provider Identifier (NPI) for Thomas Christl is 1669813267, 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 2020-03-05.