Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum
Dr. William Hayduk, PA-C, ND
Physician Assistant in Chicago, IL · enumerated 2012.
Data current as of Jul 13, 2026 · sourced from CMS NPPES
National Provider Identifier
1821363870
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Registry record
Entity type Individual (Type 1)
Name Dr. William Hayduk
Credential PA-C, ND
Sex Male
Practice address 6457 S Pulaski Rd, Chicago, IL, 60629
Phone (773) 767-2225
Enumeration date Mar 8, 2012
Last updated in NPPES Dec 30, 2021
Taxonomy & licenses
363A00000X Physician Assistant Physician Assistants & Advanced Practice Nursing Providers · License 085005479 (IL) Primary
Other identifiers
| Identifier | Type | State | Issuer |
|---|---|---|---|
| 1821363870 | Medicaid | IL | - |
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 is the NPI number for William Hayduk?
The National Provider Identifier (NPI) for William Hayduk is 1821363870, a Type 1 (individual) record in the CMS NPPES registry.
Where does William Hayduk practice?
The practice location on file with NPPES is in Chicago, IL. Providers can have multiple locations; NPPES lists the primary practice address.
Other providers at this practice address
Browse all →Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2021-12-30.