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

Mr. Matthew Eilers Decker, LCSW

Mental Health Counselor in Suisun City, CA · enumerated 2010 · practices at E5 Therapy.

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

National Provider Identifier

1386965069

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Registry record

Entity type Individual (Type 1)

Name Mr. Matthew Eilers Decker

Credential LCSW

Sex Male

Practice address Suisun City, CA, 94585

Phone (707) 225-7899

Fax (707) 759-3810

Enumeration date Jun 17, 2010

Last updated in NPPES Feb 9, 2024

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

Taxonomy & licenses

1041C0700X Clinical Social Worker Behavioral Health & Social Service Providers · License 83925 (CA) Secondary

171M00000X Case Manager/Care Coordinator Other Service Providers Secondary

101YM0800X Mental Health Counselor Behavioral Health & Social Service Providers · License 83925 (CA) Primary

LCSW · Licensed Clinical Social Worker: A social worker licensed for clinical practice including mental-health therapy. About the LCSW 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 Matthew Decker practice?

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

What is the NPI number for Matthew Decker?

The National Provider Identifier (NPI) for Matthew Decker is 1386965069, a Type 1 (individual) record in the CMS NPPES registry.

Other providers at this practice address

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2024-02-09.