Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Dr. Anna Colleen Diedesch, AU.D.

Audiologist in Portland, OR · enumerated 2010.

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

National Provider Identifier

1992025795

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Registry record

Entity type Individual (Type 1)

Name Dr. Anna Colleen Diedesch

Credential AU.D.

Sex Female

Practice address 3710 Sw Us Veterans Hospital Rd, Ncrar, Portland, OR, 97239

Phone (503) 220-8262

Fax (503) 721-1402

Enumeration date Jun 3, 2010

Last updated in NPPES Jun 3, 2010

Taxonomy & licenses

231H00000X Audiologist Speech, Language and Hearing Service Providers · License 23196 (OR) 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

Where does Anna Diedesch practice?

The practice location on file with NPPES is in Portland, OR. Providers can have multiple locations; NPPES lists the primary practice address.

What is the NPI number for Anna Diedesch?

The National Provider Identifier (NPI) for Anna Diedesch is 1992025795, a Type 1 (individual) record in the CMS NPPES registry.

Other providers at this practice address

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Richard Ismach Emergency Medicine Physician · Portland, OR NPI 1780688556 James Bryan Emergency Medicine Physician · Portland, OR NPI 1083618524 James Sardo Clinical Psychologist · Portland, OR NPI 1366432643 Laurent Avondstondt Family Nurse Practitioner · Portland, OR NPI 1053302265 Molly Phan Optometrist · Portland, OR NPI 1124003397 Christopher Blazes Psychiatry Physician · Portland, OR NPI 1568449916 Elizabeth White-Chu Geriatric Medicine (Internal Medicine) Physician · Portland, OR NPI 1588638183 Megan Clark Registered Dietitian · Portland, OR NPI 1548234537

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2010-06-03.