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

Mr. Steven Duane Grierson, MFT, LCADC

Marriage & Family Therapist in Henderson, NV · enumerated 2018 · practices at Insight To Action LLC.

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

National Provider Identifier

1770086209

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Registry record

Entity type Individual (Type 1)

Name Mr. Steven Duane Grierson

Credential MFT, LCADC

Sex Male

Practice address Henderson, NV, 89014

Phone (702) 568-5888

Fax (702) 568-7554

Enumeration date Mar 11, 2018

Last updated in NPPES Mar 11, 2018

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

Taxonomy & licenses

101YA0400X Addiction (Substance Use Disorder) Counselor Behavioral Health & Social Service Providers · License 1606 (NV) Secondary

106H00000X Marriage & Family Therapist Behavioral Health & Social Service Providers · License 0907 (NV) Primary

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.

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Frequently asked questions

Is this the official NPI registry?

No. NPI Portal is a private site built on public CMS NPPES data. The official registry is npiregistry.cms.hhs.gov, operated by CMS.

What specialty is Steven Grierson?

Steven Grierson is registered in NPPES with the primary taxonomy of Marriage & Family Therapist. The taxonomy code describes the provider's classification and area of specialization for claims and credentialing.

Other providers at this practice address

Browse all →

Sherin Roofian Marriage & Family Therapist · Henderson, NV NPI 1184908618 Cheryl Davis Marriage & Family Therapist · Henderson, NV NPI 1568974806 Insight To Action LLC Mental Health Clinic/Center (Including Community Mental Health Center) · Henderson, NV NPI 1053828335 Eliany Reyes Professional Counselor · Henderson, NV NPI 1497415897

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2018-03-11.