Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum
Dr. Duane A. Chang, O.D.
Optometrist in Waipahu, HI · enumerated 2006.
Data current as of Jul 13, 2026 · sourced from CMS NPPES
National Provider Identifier
1659318244
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Registry record
Entity type Individual (Type 1)
Name Dr. Duane A. Chang
Credential O.D.
Sex Male
Practice address 94-050 Farrington Hwy, Suite B1-1, Waipahu, HI, 96797
Phone (808) 677-1544
Fax (808) 671-3538
Enumeration date Jun 1, 2006
Last updated in NPPES Dec 14, 2007
Taxonomy & licenses
OD · Doctor of Optometry: A licensed optometrist providing primary vision care, eye exams, and corrective lenses.
About the OD credential
Other identifiers
| Identifier | Type | State | Issuer |
|---|---|---|---|
| 04135901 | Medicaid | HI | - |
| 04135902 | Medicaid | HI | - |
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
How do I verify Duane Chang's NPI record?
Cross-check NPI 1659318244 against the official CMS registry at npiregistry.cms.hhs.gov. This page mirrors the same public NPPES data with a monthly snapshot.
Is NPI 1659318244 active?
Yes, as of the latest NPPES snapshot, NPI 1659318244 is active (record last updated 2007-12-14).
Other providers at this practice address
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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2007-12-14.