Type 2 · Organization ✓ Active NPI ✓ Valid NPI checksum

Certified Hearing Services, Pllc

Audiologist-Hearing Aid Fitter in Walla Walla, WA · enumerated 2007 · authorized official Mary Lou Yocum, Owner Audiologist.

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

National Provider Identifier

1043343932

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Registry record

Entity type Organization (Type 2)

Legal business name Certified Hearing Services, Pllc

Practice address 403 E Rose St, Walla Walla, WA, 99362

Phone (509) 525-2759

Fax (509) 525-1998

Enumeration date Mar 13, 2007

Last updated in NPPES Nov 26, 2007

Taxonomy & classification

237600000X Audiologist-Hearing Aid Fitter Speech, Language and Hearing Service Providers Primary

Authorized official

Name Mary Lou Yocum

Title Owner Audiologist

Phone (509) 525-2759

Other identifiers

Identifier	Type	State	Issuer
7055809	Medicaid	WA	-
9092008	Medicaid	WA	-

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 is Certified Hearing Services, Pllc located?

The practice location on file with NPPES is in Walla Walla, WA.

How current is this record?

Data comes from the CMS NPPES public dissemination file; this record was last updated in NPPES on 2007-11-26. Verify at npiregistry.cms.hhs.gov.

Providers at this address

Browse all →

Mary Lou Yocum Audiologist-Hearing Aid Fitter · Walla Walla, WA NPI 1740379361 Joanne Price Audiologist-Hearing Aid Fitter · Walla Walla, WA NPI 1588734206

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2007-11-26.