Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Catherine Eileen Demirel, PH.D.

Audiologist in Washington, DC · enumerated 2008.

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

National Provider Identifier

1396919338

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Registry record

Entity type Individual (Type 1)

Name Catherine Eileen Demirel

Credential PH.D.

Sex Female

Practice address 2115 Wisconsin Ave Nw, Suite 202, Washington, DC, 20007

Phone (202) 944-5300

Enumeration date Apr 22, 2008

Last updated in NPPES Jan 27, 2015

Taxonomy & licenses

231H00000X Audiologist Speech, Language and Hearing Service Providers · License AUD000119 (DC) Primary

PHD · Doctor of Philosophy: A doctoral degree; in healthcare often held by clinical psychologists and researchers. About the PHD 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.

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Frequently asked questions

What specialty is Catherine Demirel?

Catherine Demirel is registered in NPPES with the primary taxonomy of Audiologist. 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 2015-01-27.