Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum
William Lee Chang II
Physician Assistant in Pontiac, IL · enumerated 2010.
Data current as of Jul 13, 2026 · sourced from CMS NPPES
National Provider Identifier
1023326121
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Registry record
Entity type Individual (Type 1)
Name William Lee Chang II
Sex Male
Practice address 2500 W Reynolds St, Pontiac, IL, 61764
Phone (815) 844-4062
Fax (815) 844-4962
Enumeration date Sep 23, 2010
Last updated in NPPES Sep 23, 2010
Taxonomy & licenses
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 NPI 1023326121 active?
Yes, as of the latest NPPES snapshot, NPI 1023326121 is active (record last updated 2010-09-23).
How do I verify William Chang's NPI record?
Cross-check NPI 1023326121 against the official CMS registry at npiregistry.cms.hhs.gov. This page mirrors the same public NPPES data with a monthly snapshot.
Other providers at this practice address
Browse all → Saint James Hospital Anesthesiology Physician · Pontiac, IL NPI 1790735421 Saint James Hospital General Acute Care Hospital · Pontiac, IL NPI 1407808090 Saint James Hospital Medicare Defined Swing Bed Hospital Unit · Pontiac, IL NPI 1023060613 Saint James Hospital Family Medicine Physician · Pontiac, IL NPI 1699722983 Steven Norris Family Medicine Physician · Pontiac, IL NPI 1316988934 Vanessa Pitts Emergency Medicine Physician · Pontiac, IL NPI 1588691687 Richard Ruff Emergency Medicine Physician · Pontiac, IL NPI 1215954839 Daniel Butterbach Emergency Medicine Physician · Pontiac, IL NPI 1861419327
Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2010-09-23.