Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Mary Elizabeth Tierney, RDH

Dental Hygienist in Chandler, AZ · enumerated 2013.

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

National Provider Identifier

1710327341

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Registry record

Entity type Individual (Type 1)

Name Mary Elizabeth Tierney

Credential RDH

Sex Female

Practice address 485 S Dobson Rd, #204, Chandler, AZ, 85224

Phone (480) 821-9022

Enumeration date Jun 27, 2013

Last updated in NPPES Jun 27, 2013

Taxonomy & licenses

124Q00000X Dental Hygienist Dental Providers · License H04283 (AZ) Primary

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.

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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 Mary Tierney?

Mary Tierney is registered in NPPES with the primary taxonomy of Dental Hygienist. The taxonomy code describes the provider's classification and area of specialization for claims and credentialing.

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2013-06-27.