Roger Chang, M.D.
Hospitalist Physician · Orange, CA
Roger Chang, M.D. is a hospitalist physician with a practice address in Orange, California, and NPI 1730158239, issued on Mar 16, 2006. Check the license (California A81984, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Roger Chang
- Credential
- M.D.
- Primary taxonomy
- Hospitalist Physician 208M00000X
- License number
- A81984 CA
Self-reported in NPPES; status is on the state search - Practice location
- 2501 E Chapman Ave, Orange, CA 92869
- Phone
- (714) 771-8000
- Enumerated
- Mar 16, 2006
- Record last updated
- Oct 21, 2020 (not updated in 6 years: call before relying on the address or phone)
- Medicare enrollment
- Enrolled (PECOS I20050622001342); accepts Medicare assignment
- Medical or professional school
- Northwestern University Feinberg Medical School, 2001
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
8 nearest hospitalist physician records → All 3,099 in California → Look up another NPI →
Also registered at 2501 E Chapman Ave
A shared address usually means a shared clinic or building; it does not show who employs whom.
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- Nicole Awad, M.D.Family Medicine Physician1295821189
- Albert Bach, PHARM.D.Pharmacist Clinician (PhC)/ Clinical Pharmacy Specialist1922355742
Verify Roger Chang in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license A81984Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
68% fewer Medicare Part D claims than the average hospitalist physician in 2024
168 Medicare Part D claims for 85 beneficiaries, against an average of 521 among the 21,613 providers of this specialty who prescribed in Part D.
Source: CMS Medicare Part D Prescribers by Provider and Drug, 2024 (data.cms.gov). Part D covers prescriptions for Medicare patients only; drugs with fewer than 11 claims are not published.
Industry payments in 2024: $55.87
2 payments; by number, the most common kind was food and beverage; the largest payer was Scpharmaceuticals Inc. The 7,324 providers of this specialty with any payment received $494.84 on average. Payments are reported by manufacturers, not by the provider, and are not a sign of wrongdoing.
Source: CMS Open Payments, program year 2024 (openpaymentsdata.cms.gov); average among providers of this specialty with at least one payment.
Bills Medicare through one group practice
- Providence Medical FoundationOrange, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Roger Chang among 3,099 hospitalist physician records in California
Roger Chang, M.D. is one of 3,099 hospitalist physician records with a practice address in California. 90% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2006, is newer than 2% of them.
- NPI issued2006 · 2% of these records are older, 73% newer
- In a Medicare fileYes · 90% of these records are
- In the CMS Doctors and Clinicians fileYes · 81% of these records are
- Graduated2001 · median 2010 among the 2,505 with a school on file
- Record last updated2020 · 49% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 208M00000X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Hospitalist Physician providers in California
There are 3,099 hospitalist physician records in California.
All 3,099 in California → Every provider in Orange → Hospitalist Physician nationwide →
The 8 hospitalist physician records with the nearest ZIP codes
- Anwar Abdelhadi, M.D.Orange, CA 928691093784191
- Jason Caberto, D.O.Orange, CA 928691144592924
- Eui Cha, M.D.Orange, CA 928691497047757
- James Roh, MDOrange, CA 928691033222500
- Frederick Chua, M.D.Orange, CA 928681477180701
- Varun Dang, MDOrange, CA 928681043888274
- Sean Dornbush, DOOrange, CA 928681538798236
- Paul EliasOrange, CA 928681730765157
Common questions
What is Roger Chang, M.D.'s NPI number?
Roger Chang, M.D.'s National Provider Identifier (NPI) is 1730158239, issued on Mar 16, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Roger Chang, M.D. located?
The NPPES record lists a practice address at 2501 E Chapman Ave, Orange, CA, 92869. Phone: (714) 771-8000. Providers update this record themselves, so call before visiting.
How can I verify Roger Chang, M.D.'s license?
NPPES lists California license number A81984, as entered by the provider. Search the Medical Board of California at https://www.mbc.ca.gov/License-Verification/default.aspx. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does Roger Chang, M.D. prescribe under Medicare Part D?
In 2024, Roger Chang, M.D. had 168 Medicare Part D claims for 85 beneficiaries; the average among hospitalist physician prescribers was 521. Part D covers Medicare prescriptions only.
Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. Medicare files from data.cms.gov. An NPI identifies who bills; it is not a license.
Figures on PlainDoctor are read from the federal files each page names (CMS NPPES, Medicare Part D, MIPS, Open Payments; the HHS-OIG exclusion list only as counts) and from Census population estimates, with the file date shown beside them. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 9, 2026.