Roger Kornu, M.D.
NPI 1841386349 · Rheumatology Physician · Tustin, CA
Enrolled with Medicare as Practitioner - Rheumatology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Roger Kornu, M.D. is a Rheumatology Physician provider in Tustin, CA (NPI 1841386349).
Provider details
- NPI number
- 1841386349
- Entity type
- Individual
- Primary specialty
- Rheumatology PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Male
- Sole proprietor
- No
- License
- A78140 (CA)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure25% of score
19 yrs in NPPES registry
- Profile completeness25% of score
100% of core fields populated
- Practice footprint15% of score
1 documented practice location
- Medicare service volume (vs. specialty peers)25% of score
5,165 Medicare services, 2024 (ranked within specialty)
- Open Payments transparency10% of score
Has Open Payments disclosures (2024)
Medicare volume is ranked against active providers in the same specialty. Signals a provider has no public data for (e.g. Medicare claims) are left out of the score entirely — never counted as zero — so providers without that data are not penalized. See the full formula and weights in our .
What this provider does (Medicare)
Based on Medicare fee-for-service claims, 2024; not all care is captured.
| Service (HCPCS) | Medicare services | Typical Medicare-allowed (2024) |
|---|---|---|
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 2,048 | $138 |
| Infusion Into a Vein for Therapy, Prevention, Or Diagnosis, 1 Hour Or Less96365 | 929 | $72 |
| Injection of Drug Or Substance Under Skin Or Into Muscle96372 | 596 | $16 |
| Administration of Chemotherapy Into Vein, 1 Hour Or Less96413 | 442 | $148 |
| Administration of Chemotherapy Into Vein, Each Additional Hour96415 | 234 | $31 |
| Established Patient Office Or Other Outpatient Visit With High Level of Medical Decision Making, If Using Time, 40 Minutes Or More99215 | 203 |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 27 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Prednisone | 211 | 94 |
| Methotrexate Sodiumbrand: Methotrexate | 209 | 94 |
| Hydroxychloroquine Sulfate | 153 | 65 |
| Alendronate Sodium | 85 | 34 |
| Leflunomide | 76 | 33 |
| Sulfasalazine | 72 | 27 |
| Meloxicam | 62 | 33 |
| Celecoxib |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$113,302 across 305 records (Open Payments 2024)
Open Payments discloses payments and transfers of value (meals, travel, consulting, research, royalties) from drug and device makers to providers. This is a transparency signal, not a verdict — such payments are legal and common, and their presence is neither an endorsement nor a criticism. Source: CMS Open Payments, program year 2024.
Practice location
Mailing address
Registry dates
- Enumerated
- 2006-10-04
- Last updated
- 2026-01-30
- Certified
- 2026-01-30
Frequently asked questions
- What is Roger Kornu's NPI number?
- Roger Kornu's National Provider Identifier (NPI) is 1841386349, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Roger Kornu's specialty?
- Roger Kornu is listed in the NPPES registry with a primary specialty of Rheumatology Physician (Allopathic & Osteopathic Physicians).
- Where is Roger Kornu located?
- Roger Kornu's practice location on file with NPPES is 2552 Walnut Ave Ste 200, Tustin, CA 92780-6983.
- What is Roger Kornu's phone number?
- The practice phone number listed in the NPPES registry for Roger Kornu is (714) 406-4461.
- Does Roger Kornu accept Medicare?
- Roger Kornu is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Roger Kornu's NPI active?
- Yes — Roger Kornu's NPI (1841386349) is active in the NPPES registry as of the last update on 2026-01-30.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.