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Mary Ruth Sizer, MA, CCCA, FAAA

Audiologist-Hearing Aid Fitter in Boone, NC · enumerated 2006 · practices at Appalachian State University.

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

National Provider Identifier

1952323818

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Registry record

Entity type Individual (Type 1)
Name Mary Ruth Sizer
Credential MA, CCCA, FAAA
Sex Female
Practice address 400 University Hall Drive, Room 120, Boone, NC, 28608
Phone (828) 262-2185
Fax (828) 262-6766
Enumeration date Jul 23, 2006
Last updated in NPPES Oct 10, 2008

Taxonomy & licenses

237600000X Audiologist-Hearing Aid Fitter Speech, Language and Hearing Service Providers · License 1210 (NC) Primary

Other identifiers

Identifier Type State Issuer
7411012 Medicaid NC -
76692 Other NC BLUE CROSS BS OF NC

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

What specialty is Mary Sizer?
Mary Sizer is registered in NPPES with the primary taxonomy of Audiologist-Hearing Aid Fitter. The taxonomy code describes the provider's classification and area of specialization for claims and credentialing.
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.

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2008-10-10.