Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Louann Mercier, DDS

Dentist in Chehalis, WA · enumerated 2006.

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

National Provider Identifier

1518986546

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Registry record

Entity type Individual (Type 1)

Name Louann Mercier

Credential DDS

Sex Female

Practice address 2690 Ne Kresky Ave, Chehalis, WA, 98532

Phone (360) 330-9595

Enumeration date Jul 19, 2006

Last updated in NPPES Feb 3, 2025

Taxonomy & licenses

122300000X Dentist Dental Providers · License DE00009333 (WA) Primary

DDS · Doctor of Dental Surgery: A licensed dentist; DDS and DMD are equivalent dental degrees. About the DDS credential

Other identifiers

Identifier	Type	State	Issuer
1091995	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

What is the NPI number for Louann Mercier?

The National Provider Identifier (NPI) for Louann Mercier is 1518986546, a Type 1 (individual) record in the CMS NPPES registry.

Where does Louann Mercier practice?

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

Other providers at this practice address

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2025-02-03.