HealthcareDiscovery.AI / Doctors / California / Simi Valley / Rheumatology

Rheumatology in Simi Valley, California

Data updated monthly · Last refresh September 2026

2 Rheumatology providers practice in Simi Valley. Listings are drawn from federal public records and are not endorsements.

Rheumatology providers in Simi Valley

Listed alphabetically. Payment figures come from the federal Open Payments program, which requires drug and device companies to report what they pay physicians for consulting, speaking, meals, travel and royalties. A disclosed payment is a financial relationship, not evidence of wrongdoing, and many totals reflect a single meal. Figures cover calendar year 2025.

Dr. Courtney O'brien, DO
Simi Valley, CA · $39 in drug and device payments (2025) · Telehealth · (805) 583-7640
Dr. Tony Makhlouf, MD
Simi Valley, CA · $3,023 in drug and device payments (2025) · Telehealth · (805) 842-1793

Conditions Rheumatology providers in Simi Valley, California commonly treat

Patients often search by condition rather than specialty. These are conditions typically managed by Rheumatology providers. Individual practices vary, so confirm with the provider before booking.

Common questions

How many Rheumatology providers are in Simi Valley, California?

There are 2 Rheumatology providers with active NPI records practicing in Simi Valley, according to federal NPPES data refreshed monthly.

What conditions do Rheumatology providers in Simi Valley treat?

Rheumatology providers in Simi Valley commonly treat rheumatoid arthritis, lupus, gout, psoriatic arthritis, fibromyalgia and related conditions. Individual practices vary, so confirm with the provider before booking.

Where does this data come from?

Provider records come from the federal NPPES registry and CMS Doctors and Clinicians files. Payment figures come from the CMS Open Payments program for calendar year 2025. The directory refreshes monthly.

All specialties in Simi Valley Rheumatology across California

Sources: NPPES (CMS), Doctors and Clinicians national files, CMS Open Payments 2025. Updated monthly. Records are public federal data and are not verified credentials, licensure checks, or endorsements. This directory is informational and not medical advice. How we build this directory.