1. Home
  2. Directory
  3. California
  4. Tustin
  5. Internal Medicine
  6. NPI Profile

ROGER KORNU MD PC
NPI 1912418674
Internal Medicine - Rheumatology in Tustin, CA

Active since October 19, 2017
2552 WALNUT AVE STE 200, TUSTIN, CA 92780(714) 406-4461(714) 669-9790 Get Directions Write a Review

NPPES record last updated: January 30, 2026. Verified against the NPPES registry weekly; last sync: October 25, 2026.

Record update history: Jan 30, 2026, Nov 5, 2024, Sep 11, 2024 and 3 more (6 updates tracked since 2017).

About Roger Kornu Md Pc NPPES

Official registry information on file with the National Plan and Provider Enumeration System.

ROGER KORNU MD PC (NPI 1912418674), doing business as Southern California Rheumatology, is a healthcare organization registered as a rheumatology in Tustin, California and active in the NPI registry since October 2017. The organization lists Roger Kornu, Owner, as its authorized official.

NPPES Registry Identity

NPI1912418674
Entity TypeOrganization
Primary Taxonomy207RR0500X
Legal Business NameROGER KORNU MD PC
Location Address2552 WALNUT AVE STE 200Tustin, CA 92780-6983
Mailing Address2552 Walnut Ave Ste 200Tustin, CA 92780-6983 · (714) 406-4461 · Fax (714) 669-9790
Phone(714) 406-4461
Fax(714) 669-9790
Organization SubpartNo
Authorized OfficialRoger KornuOwner · (714) 406-4461
Enumeration DateOctober 19, 2017
Last NPPES UpdateJanuary 30, 20266 updates tracked since enumeration
NPPES CertifiedJanuary 30, 2026
✔ NPI 1912418674 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyInternal Medicine · RheumatologyAllopathic & Osteopathic Physicians
Taxonomy Code207RR0500X
Definition
An internist who treats diseases of joints, muscle, bones and tendons. This specialist diagnoses and treats arthritis, back pain, muscle strains, common athletic injuries and collagen diseases.
2552 WALNUT AVE STE 200, Tustin, CA 92780
Open in Google Maps ↗

Other Names 1

Doing Business AsSouthern California Rheumatology

Group Practice 1

Group TaxonomyThis provider is a business group of one or more individual practitioners, who practice with different areas of specialization.193200000X MULTI-SPECIALTY GROUP

Accepted Insurance

The full list of accepted plans is on the Insurance tab. Issuers include Alliant Health Plans, Inc., Ambetter from Absolute Total Care, Ambetter from Arkansas Health & Wellness and more.Insurance ›

Medicare Participation & PECOS CMS

Medicare enrollment and the clinicians who bill Medicare through this organization, from CMS.

Medicare Enrollment Status

✔

Enrolled in Medicare (PECOS)

Roger Kornu Md Pc is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).

Clinicians Billing Medicare Through This Organization

2

Medicare enrollment records show 2 clinicians reassign Medicare billing to Roger Kornu MD PC, which bills Medicare for the services they deliver. Of these, 1 practice at this address and 2 within 10 miles. They are listed nearest first.

Clinicians, nearest first (2)

Roger Kornu, M.D.
Rheumatology
NPI 1841386349
2552 WALNUT AVE STE 200
Tustin, CA 92780
(714) 406-4461
✔ PECOS✔ Accepts MedicareSame address
Nancy Nicolosi, NP-C
Nurse Practitioner
NPI 1598122087
24331 EL TORO RD SUITE 380
Laguna Woods, CA 92637
(949) 583-0222
✔ PECOS✔ Accepts Medicare8.7 mi

Source: CMS Revalidation Reassignment List, October 2026 release. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.

Frequently Asked Questions NPPES & CMS

Common questions about this NPI record, answered from the official NPPES registry and CMS datasets shown on this page.

What is Roger Kornu MD PC's NPI number?

The NPI number for Roger Kornu MD PC is 1912418674. It was assigned to this organization in the NPPES registry on October 19, 2017. The provider is doing business as Southern California Rheumatology.

Where is Roger Kornu MD PC located?

Roger Kornu MD PC is located at 2552 Walnut Ave Ste 200, Tustin, CA 92780. The listed phone number is (714) 406-4461.

What is Roger Kornu MD PC's specialty?

The primary specialty registered for this NPI is Internal Medicine, specializing in Rheumatology, with taxonomy code 207RR0500X.

Is Roger Kornu MD PC enrolled in Medicare?

Yes. Roger Kornu MD PC is registered in the Medicare PECOS enrollment system.

How many clinicians bill Medicare through Roger Kornu MD PC?

According to the CMS Revalidation Reassignment List (October 2026 release), 2 clinicians reassign their Medicare billing to Roger Kornu MD PC, in Nurse Practitioner and Rheumatology. A reassignment is filed with Medicare on form CMS-855R, signed by both the clinician and the organization, and lets the organization bill Medicare and receive payment for the clinician's services. Of these, 1 practice at this address and 2 within 10 miles. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.

What insurance does Roger Kornu MD PC accept?

Health plans from Alliant Health Plans, Inc., Ambetter Health, Ambetter Health of Delaware, Ambetter from Absolute Total Care and Ambetter from Arkansas Health & Wellness and 28 other insurers list Roger Kornu MD PC as in-network in at least one marketplace plan. Coverage varies by plan and year; verify with the insurer or the provider before a visit.

When was this NPI record last updated?

The NPPES record for Roger Kornu MD PC was last updated on January 30, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 9 months ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.