Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Dr. Margaret Nowak Triezenberg, AU.D.

Audiologist in Maywood, IL · enumerated 2018.

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

National Provider Identifier

1912490673

Verified

See something wrong? Report a correction

Registry record

Entity type Individual (Type 1)

Name Dr. Margaret Nowak Triezenberg

Credential AU.D.

Sex Female

Practice address 2160 S 1st Ave Ste 4422, Maywood, IL, 60153

Phone (708) 216-3821

Enumeration date Jun 7, 2018

Last updated in NPPES Jun 7, 2018

Taxonomy & licenses

231H00000X Audiologist Speech, Language and Hearing Service Providers · License 147001636 (IL) 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 NPI 1912490673 active?

Yes, as of the latest NPPES snapshot, NPI 1912490673 is active (record last updated 2018-06-07).

How do I verify Margaret Triezenberg's NPI record?

Cross-check NPI 1912490673 against the official CMS registry at npiregistry.cms.hhs.gov. This page mirrors the same public NPPES data with a monthly snapshot.

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2018-06-07.