Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum
Roger Chang, M.D.
Hospitalist Physician in Orange, CA · enumerated 2006.
Data current as of Jul 13, 2026 · sourced from CMS NPPES
National Provider Identifier
1730158239
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Registry record
Entity type Individual (Type 1)
Name Roger Chang
Credential M.D.
Sex Male
Practice address 2501 E Chapman Ave, Orange, CA, 92869
Phone (714) 771-8000
Enumeration date Mar 16, 2006
Last updated in NPPES Oct 21, 2020
Taxonomy & licenses
MD · Doctor of Medicine: A physician who completed medical school (allopathic medicine), residency training, and state licensure.
About the MD credential
Other identifiers
| Identifier | Type | State | Issuer |
|---|---|---|---|
| 1912919804 | Other | - | NPI - TYPE 2 |
| CG5665 | Other | CA | RAIL ROAD MEDICARE - GROUP PTAN |
| W1514 | Other | CA | MEDICARE PTAN - TYPE 2 |
| P00244225 | Other | CA | RAIL ROAD MEDICARE - PROVIDER PTAN |
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 Roger Chang?
Roger Chang is registered in NPPES with the primary taxonomy of Hospitalist Physician. The taxonomy code describes the provider's classification and area of specialization for claims and credentialing.
Other providers at this practice address
Browse all → John Murashige Family Medicine Physician · Orange, CA NPI 1982605481 Anwar Abdelhadi Hospitalist Physician · Orange, CA NPI 1093784191 Philip Madrid Adult Medicine Physician · Orange, CA NPI 1578523692 Robert Budman Family Medicine Physician · Orange, CA NPI 1598725814 Jong Park Family Medicine Physician · Orange, CA NPI 1497719942 Allen Houshiar Family Medicine Physician · Orange, CA NPI 1427076272 James Roh Hospitalist Physician · Orange, CA NPI 1033222500 Virany Kreng Family Medicine Physician · Orange, CA NPI 1891881660
Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2020-10-21.