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

Mr. Steven Nagasaka I, M.A., LMFT

Marriage & Family Therapist in Wailuku, HI · enumerated 2014.

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

National Provider Identifier

1689097453

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Registry record

Entity type Individual (Type 1)

Name Mr. Steven Nagasaka I

Credential M.A., LMFT

Sex Male

Practice address Wailuku, HI, 96793

Phone (808) 249-2431

Enumeration date Jan 29, 2014

Last updated in NPPES Jan 29, 2014

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 MFT 365 (HI) 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

Where does Steven Nagasaka practice?

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

What is the NPI number for Steven Nagasaka?

The National Provider Identifier (NPI) for Steven Nagasaka is 1689097453, a Type 1 (individual) record in the CMS NPPES registry.

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2014-01-29.