Roger Kornu, M.D.
Rheumatology Physician · Tustin, CA
Roger Kornu, M.D. is a rheumatology physician with a practice address in Tustin, California, and NPI 1841386349, issued on Oct 4, 2006. Check the license (California A78140, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Roger Kornu
- Credential
- M.D.
- Primary taxonomy
- Rheumatology Physician 207RR0500X
- License number
- A78140 CA
Self-reported in NPPES; status is on the state search - Practice location
- 2552 Walnut Ave Ste 200, Tustin, CA 92780
- Phone
- (714) 406-4461
- Enumerated
- Oct 4, 2006
- Record last updated
- Jan 30, 2026
- Fax
- (714) 669-9790
- Medicare enrollment
- Enrolled (PECOS I20050808000328); accepts Medicare assignment
- Medical or professional school
- University Of Texas Southwestern Medical School At Dallas, 1999
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
8 nearest rheumatology physician records → All 926 in California → Look up another NPI →
Verify Roger Kornu in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license A78140Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
22% fewer Medicare Part D claims than the average rheumatology physician in 2024
1,544 Medicare Part D claims for 405 beneficiaries, against an average of 1,978 among the 6,301 providers of this specialty who prescribed in Part D. Brand-name drugs were 13% of claims. 16 claims were for opioids.
Most prescribed
- Prednisone211 claims
- Methotrexate209 claims
- Hydroxychloroquine Sulfate153 claims
- Alendronate Sodium85 claims
- Leflunomide76 claims
- Sulfasalazine72 claims
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.
The MIPS final score for 2023 (Medicare payment program): 82 of 100
The Merit-based Incentive Payment System score is reported for this clinician. Four categories are weighted into the final score; the average among 454,083 clinicians with a measured score was 83.5.
Source: CMS Quality Payment Program, MIPS performance year 2023; category weights for 2023 (qpp.cms.gov).
Industry payments in 2024: $113,302.09
305 payments; by number, the most common kind was food and beverage; the largest payer was Abbvie Inc. The 4,486 providers of this specialty with any payment received $8,538.33 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
- Roger Kornu MD PCTustin, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Roger Kornu among 926 rheumatology physician records in California
Roger Kornu, M.D. is one of 926 rheumatology physician records with a practice address in California. 81% 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 6% of them.
- NPI issued2006 · 6% of these records are older, 55% newer
- In a Medicare fileYes · 81% of these records are
- In the CMS Doctors and Clinicians fileYes · 69% of these records are
- Graduated1999 · median 2003 among the 641 with a school on file
- Record last updated2026 · 62% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207RR0500X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Rheumatology Physician providers in California
There are 926 rheumatology physician records in California.
All 926 in California → Every provider in Tustin → Rheumatology Physician nationwide →
The 8 rheumatology physician records with the nearest ZIP codes
- Robin Dore, MDTustin, CA 927801619972510
- Maryam Gul, M.D.Anaheim, CA 928021497015192
- Nicholas Kim, M.D.Anaheim, CA 928041235227760
- Kara Bradford, M.D.Anaheim, CA 928071457582488
- Parke Chang, MDAnaheim, CA 928071013122605
- Charles Kenyon, MDAnaheim, CA 928071043417447
- Randy Lehmer, MDAnaheim, CA 928071770654683
- Swati Medhekar, MDAnaheim, CA 928071427125442
Common questions
What is Roger Kornu, M.D.'s NPI number?
Roger Kornu, M.D.'s National Provider Identifier (NPI) is 1841386349, issued on Oct 4, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Roger Kornu, M.D. located?
The NPPES record lists a practice address at 2552 Walnut Ave Ste 200, Tustin, CA, 92780. Phone: (714) 406-4461. Providers update this record themselves, so call before visiting.
How can I verify Roger Kornu, M.D.'s license?
NPPES lists California license number A78140, 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 Kornu, M.D. prescribe under Medicare Part D?
In 2024, Roger Kornu, M.D. had 1,544 Medicare Part D claims for 405 beneficiaries; the average among rheumatology physician prescribers was 1,978. Part D covers Medicare prescriptions only.
What is Roger Kornu, M.D.'s MIPS final score?
The 2023 MIPS final score is 82 of 100. The average among 454,083 clinicians with a measured score was 83.5.
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.