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

Randall Ray Masterson, M.S., C.S.P.

Psychologist in Olney, IL · enumerated 2012.

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

National Provider Identifier

1790056489

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Registry record

Entity type Individual (Type 1)

Name Randall Ray Masterson

Credential M.S., C.S.P.

Sex Male

Practice address Olney, IL, 62450

Phone (618) 392-2725

Fax (866) 302-0227

Enumeration date Jan 26, 2012

Last updated in NPPES Jan 26, 2012

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

Taxonomy & licenses

103T00000X Psychologist Behavioral Health & Social Service Providers · License 969847 (IL) 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

Where does Randall Masterson practice?

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

What is the NPI number for Randall Masterson?

The National Provider Identifier (NPI) for Randall Masterson is 1790056489, a Type 1 (individual) record in the CMS NPPES registry.

Other providers at this practice address

Browse all →

Jack Cole Clinical Psychologist · Olney, IL NPI 1619943784 Cheryl Colwell Mental Health Counselor · Olney, IL NPI 1811186919 Randall Ray Masterson Clinical Psychologist · Olney, IL NPI 1659550879 Colwell Counseling & Consulting Services, Inc. Preferred Provider Organization · Olney, IL NPI 1790105617 Living Well Counseling and Therapy Solutions Community/Behavioral Health Agency · Olney, IL NPI 1679007603

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2012-01-26.