Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Mr. Marvin Otis St Clair III, LCSW

Mental Health Counselor in Volcano, HI · enumerated 2007.

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

National Provider Identifier

1942343439

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Registry record

Entity type Individual (Type 1)

Name Mr. Marvin Otis St Clair III

Credential LCSW

Sex Male

Practice address 113850 6th, Volcano, HI, 96785

Phone (808) 967-8580

Fax (808) 934-0071

Enumeration date Feb 14, 2007

Last updated in NPPES Sep 24, 2018

Taxonomy & licenses

101YM0800X Mental Health Counselor Behavioral Health & Social Service Providers · License 3187 (HI) Primary

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

Other identifiers

Identifier	Type	State	Issuer
536336	Medicaid	HI	-
0000252791	Other	HI	HMSA PROVIDER NUMBER

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

Is NPI 1942343439 active?

Yes, as of the latest NPPES snapshot, NPI 1942343439 is active (record last updated 2018-09-24).

How do I verify Marvin St Clair's NPI record?

Cross-check NPI 1942343439 against the official CMS registry at npiregistry.cms.hhs.gov. This page mirrors the same public NPPES data with a monthly snapshot.

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2018-09-24.