Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum
Diana L. Holan
Audiologist in Tucson, AZ · enumerated 2008.
Data current as of Jul 13, 2026 · sourced from CMS NPPES
National Provider Identifier
1821251679
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Registry record
Entity type Individual (Type 1)
Name Diana L. Holan
Sex Female
Practice address 1775 W Saint Marys Rd, Ste. 211, Tucson, AZ, 85745
Phone (520) 792-2170
Fax (520) 792-9702
Enumeration date Jul 2, 2008
Last updated in NPPES Jul 2, 2008
Taxonomy & licenses
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.
Frequently asked questions
Is NPI 1821251679 active?
Yes, as of the latest NPPES snapshot, NPI 1821251679 is active (record last updated 2008-07-02).
How do I verify Diana Holan's NPI record?
Cross-check NPI 1821251679 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 2008-07-02.