NPI Portal NPI Lookup & Verification

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

Mr. Clayton Lambert Major Sr., MS

Mental Health Counselor in Fort Myers, FL · enumerated 2009.

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

National Provider Identifier

1609005883

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Registry record

Entity type Individual (Type 1)
Name Mr. Clayton Lambert Major Sr.
Credential MS
Sex Male
Practice address Fort Myers, FL, 33916
Phone (239) 226-4357
Fax (239) 226-4352
Enumeration date Jul 8, 2009
Last updated in NPPES Aug 16, 2016

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

Taxonomy & licenses

171M00000X Case Manager/Care Coordinator Other Service Providers Secondary
101YA0400X Addiction (Substance Use Disorder) Counselor Behavioral Health & Social Service Providers · License 4859 (FL) Secondary
101YM0800X Mental Health Counselor Behavioral Health & Social Service Providers Primary
101Y00000X Counselor Behavioral Health & Social Service Providers Secondary

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 NPI 1609005883 active?
Yes, as of the latest NPPES snapshot, NPI 1609005883 is active (record last updated 2016-08-16).
How do I verify Clayton Major's NPI record?
Cross-check NPI 1609005883 against the official CMS registry at npiregistry.cms.hhs.gov. This page mirrors the same public NPPES data with a monthly snapshot.

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2016-08-16.