Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum
Donna Jean Williams, PT, CWS
Physical Therapist in Fairfield, IA · enumerated 2012.
Data current as of Jul 13, 2026 · sourced from CMS NPPES
National Provider Identifier
1528312857
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Registry record
Entity type Individual (Type 1)
Name Donna Jean Williams
Credential PT, CWS
Sex Female
Practice address 200 South Main Street, Fairfield, IA, 52556
Phone (641) 472-4111
Enumeration date Nov 8, 2012
Last updated in NPPES Nov 8, 2012
Taxonomy & licenses
225100000X Physical Therapist Respiratory, Developmental, Rehabilitative and Restorative Service Providers · License 0123 (IA) Primary
PT · Physical Therapist: A licensed movement specialist treating injury and disability through exercise and rehabilitation.
About the PT 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.
Frequently asked questions
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.
What specialty is Donna Williams?
Donna Williams is registered in NPPES with the primary taxonomy of Physical Therapist. The taxonomy code describes the provider's classification and area of specialization for claims and credentialing.
Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2012-11-08.