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

Dr. Stephen David Nicholson, PH.D.

Clinical Psychologist in Richardson, TX · enumerated 2010.

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

National Provider Identifier

1578887733

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Registry record

Entity type Individual (Type 1)

Name Dr. Stephen David Nicholson

Credential PH.D.

Sex Male

Practice address Richardson, TX, 75080

Phone (214) 435-6313

Fax (972) 644-5512

Enumeration date Mar 17, 2010

Last updated in NPPES Mar 17, 2010

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

Taxonomy & licenses

103TC0700X Clinical Psychologist Behavioral Health & Social Service Providers · License 23273 (TX) Primary

103TC2200X Clinical Child & Adolescent Psychologist Behavioral Health & Social Service Providers · License 23273 (TX) Secondary

103TF0000X Family Psychologist Behavioral Health & Social Service Providers · License 23273 (TX) Secondary

103TP2701X Group Psychotherapy Psychologist Behavioral Health & Social Service Providers · License 23273 (TX) Secondary

PHD · Doctor of Philosophy: A doctoral degree; in healthcare often held by clinical psychologists and researchers. About the PHD 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.

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Frequently asked questions

Is NPI 1578887733 active?

Yes, as of the latest NPPES snapshot, NPI 1578887733 is active (record last updated 2010-03-17).

How do I verify Stephen Nicholson's NPI record?

Cross-check NPI 1578887733 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 2010-03-17.