Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum
Ms. Joy T. Williams, M.S., PH.D.
Clinical Psychologist in Norman, OK · enumerated 2007.
Data current as of Jul 13, 2026 · sourced from CMS NPPES
National Provider Identifier
1790814598
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Registry record
Entity type Individual (Type 1)
Name Ms. Joy T. Williams
Credential M.S., PH.D.
Sex Female
Practice address 3280 Marshall Ave, Norman, OK, 73072
Phone (615) 414-5431
Enumeration date Mar 5, 2007
Last updated in NPPES Aug 24, 2020
Taxonomy & licenses
101YP2500X Professional Counselor Behavioral Health & Social Service Providers · License 4868 (OK) Secondary
103TC0700X Clinical Psychologist Behavioral Health & Social Service Providers · License 1193 (OK) Primary
PHD · Doctor of Philosophy: A doctoral degree; in healthcare often held by clinical psychologists and researchers.
About the PHD credential
Other identifiers
| Identifier | Type | State | Issuer |
|---|---|---|---|
| 200375210B | Medicaid | OK | - |
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.
Frequently asked questions
How do I verify Joy Williams's NPI record?
Cross-check NPI 1790814598 against the official CMS registry at npiregistry.cms.hhs.gov. This page mirrors the same public NPPES data with a monthly snapshot.
Is NPI 1790814598 active?
Yes, as of the latest NPPES snapshot, NPI 1790814598 is active (record last updated 2020-08-24).
Other providers at this practice address
Browse all → Advanced Family Therapeutic Medical Specialty Clinic/Center · Norman, OK NPI 1942298385 William Schmid Psychologist · Norman, OK NPI 1306811633 Charles 'Sid' Kramer Clinical Social Worker · Norman, OK NPI 1851349765 Gregory E Shadid MD Pllc Child & Adolescent Psychiatry Physician · Norman, OK NPI 1932144797 Randy Hendrix Professional Counselor · Norman, OK NPI 1689601759 Ann Rooney Clinical Social Worker · Norman, OK NPI 1588773725 Lawren Merideth Psychiatry Physician · Norman, OK NPI 1356432637 Norman Psychiatric Associates, P.L.L.C. Psychiatry Physician · Norman, OK NPI 1588707335
Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2020-08-24.