Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum
Stephen Matthew Willey, PT
Physical Therapist in Modesto, CA · enumerated 2005.
Data current as of Jul 13, 2026 · sourced from CMS NPPES
National Provider Identifier
1912998311
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Registry record
Entity type Individual (Type 1)
Name Stephen Matthew Willey
Credential PT
Sex Male
Practice address 4601 Dale Rd, Modesto, CA, 95356
Phone (209) 735-4080
Fax (209) 735-4060
Enumeration date Nov 3, 2005
Last updated in NPPES Dec 30, 2021
Taxonomy & licenses
225100000X Physical Therapist Respiratory, Developmental, Rehabilitative and Restorative Service Providers · License PT25761 (CA) Primary
PT · Physical Therapist: A licensed movement specialist treating injury and disability through exercise and rehabilitation.
About the PT credential
Other identifiers
| Identifier | Type | State | Issuer |
|---|---|---|---|
| OPT256710 | Other | CA | BLUE SHIELD |
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 Stephen Willey?
Stephen Willey 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.
Other providers at this practice address
Browse all → Daniel Lundgren Optometrist · Modesto, CA NPI 1811986375 Dat Nguyen Specialist · Modesto, CA NPI 1659346435 Angela Abe Optometrist · Modesto, CA NPI 1336108885 Liansong Chen Specialist · Modesto, CA NPI 1265492292 Richard Garcia Emergency Medicine Physician · Modesto, CA NPI 1437110566 Laurel Goldstein Emergency Medicine Physician · Modesto, CA NPI 1992748446 Ajay Sood Diagnostic Radiology Physician · Modesto, CA NPI 1639113681 Jorge Kurek Anesthesiology Physician · Modesto, CA NPI 1730111774
Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2021-12-30.