NPI Portal NPI Lookup & Verification

Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Mark Walker, MS, LMHC, LPC, NCC

Mental Health Counselor in Vancouver, WA · enumerated 2006 · practices at Sea Mar Community Health Centers.

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

National Provider Identifier

1740346246

Verified

See something wrong? Report a correction

Registry record

Entity type Individual (Type 1)
Name Mark Walker
Credential MS, LMHC, LPC, NCC
Sex Male
Practice address 317 E 39th St, Vancouver, WA, 98663
Phone (360) 546-1722
Fax (360) 694-5372
Enumeration date Dec 29, 2006
Last updated in NPPES Aug 25, 2022

Taxonomy & licenses

101YP2500X Professional Counselor Behavioral Health & Social Service Providers · License LPC-476 (WY) Secondary
101YM0800X Mental Health Counselor Behavioral Health & Social Service Providers · License LH61155224 (WA) Primary
LPC · Licensed Professional Counselor: A licensed mental-health counselor providing psychotherapy. About the LPC 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

What is the NPI number for Mark Walker?
The National Provider Identifier (NPI) for Mark Walker is 1740346246, a Type 1 (individual) record in the CMS NPPES registry.
Where does Mark Walker practice?
The practice location on file with NPPES is in Vancouver, WA. Providers can have multiple locations; NPPES lists the primary practice address.

Other providers at this practice address

Browse all →

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2022-08-25.