Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum Sole proprietor

David Alan Johnston, LMFT

Marriage & Family Therapist in Eureka, CA · enumerated 2007.

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

National Provider Identifier

1437299450

Verified

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Registry record

Entity type Individual (Type 1)

Name David Alan Johnston

Credential LMFT

Sex Male

Practice address Eureka, CA, 95501

Phone (707) 798-6488

Fax (707) 441-1054

Enumeration date Feb 7, 2007

Last updated in NPPES Sep 10, 2018

Street address withheld: NPPES sole-proprietor addresses can be home addresses. See our data policy.

Taxonomy & licenses

106H00000X Marriage & Family Therapist Behavioral Health & Social Service Providers · License MFC 39235 (CA) Primary

LMFT · Licensed Marriage and Family Therapist: A licensed therapist specializing in relational and family psychotherapy. About the LMFT 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 David Johnston?

The National Provider Identifier (NPI) for David Johnston is 1437299450, a Type 1 (individual) record in the CMS NPPES registry.

Where does David Johnston practice?

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

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2018-09-10.