Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Ms. Diane Z Holstein, AUD

Audiologist in Philadelphia, PA · enumerated 2006.

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

National Provider Identifier

1770675589

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Registry record

Entity type Individual (Type 1)

Name Ms. Diane Z Holstein

Credential AUD

Sex Female

Practice address 3400 Spruce St, 5th Floor Silverstein -Audiology, Philadelphia, PA, 19104

Phone (215) 662-6525

Fax (215) 662-4182

Enumeration date Sep 29, 2006

Last updated in NPPES Sep 1, 2015

Taxonomy & licenses

231H00000X Audiologist Speech, Language and Hearing Service Providers · License AT001035L (PA) 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 1770675589 active?

Yes, as of the latest NPPES snapshot, NPI 1770675589 is active (record last updated 2015-09-01).

How do I verify Diane Holstein's NPI record?

Cross-check NPI 1770675589 against the official CMS registry at npiregistry.cms.hhs.gov. This page mirrors the same public NPPES data with a monthly snapshot.

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2015-09-01.