Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum
Dr. Joan M William
Clinical Psychologist in Dwg, TX · enumerated 2022.
Data current as of Jul 13, 2026 · sourced from CMS NPPES
National Provider Identifier
1346997764
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Registry record
Entity type Individual (Type 1)
Name Dr. Joan M William
Sex Female
Practice address 2214 Michigan Ave Ste H, Dwg, TX, 76013
Phone (800) 221-9001
Enumeration date Mar 5, 2022
Last updated in NPPES Sep 3, 2025
Taxonomy & licenses
103TC2200X Clinical Child & Adolescent Psychologist Behavioral Health & Social Service Providers · License 40810 (TX) Secondary
103TB0200X Cognitive & Behavioral Psychologist Behavioral Health & Social Service Providers · License 40810 (TX) Secondary
103TC0700X Clinical Psychologist Behavioral Health & Social Service Providers · License 40810 (TX) 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.
Frequently asked questions
What specialty is Joan William?
Joan William is registered in NPPES with the primary taxonomy of Clinical Psychologist. The taxonomy code describes the provider's classification and area of specialization for claims and credentialing.
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.
Other providers at this practice address
Browse all →Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2025-09-03.