Step 3 CCS Simulator
CCS Cases provides the most realistic USMLE Step 3 CCS simulation available online. Our interface mirrors the actual Primum software, so every order you place, every clock advance, and every patient response feels exactly like test day.
How the Simulator Works
- Primum-like interface — order entry, vitals panel, and patient chart match the real exam.
- Real-time patient model — the patient responds to your orders as the simulated clock advances.
- Intelligent order search — type natural language and the system maps to valid CCS orders.
- Instant scoring — see a point-by-point breakdown the moment you finish the case.
- AI tutor — ask "why?" at any point and get an evidence-based explanation.
What You Get
Browser-Based
No installs — practice from anywhere on any device.
200+ Scenarios
Every high-yield specialty and difficulty level.
Timed Mode
Simulate real exam pressure with 10- and 20-minute timers.
Score Analytics
Track performance over time and identify weak areas.
Who It's For
Our simulator is ideal for anyone who wants to practice CCS mechanics — not just content knowledge. If you know the medicine but feel uncertain about the CCS interface, our simulator closes that gap fast.
FAQ
How realistic is the CCS simulator?
Our simulator closely mirrors the Primum software used on the actual USMLE Step 3 exam. The order-entry interface, clock advancement, and patient response model are all designed to match the real test experience.
Do I need to install anything?
No. CCS Cases runs entirely in your browser on any device — desktop, tablet, or phone. No downloads or plugins required.
How is CCS Cases different from UWorld CCS?
CCS Cases focuses exclusively on CCS simulation with a more accurate interface replica, AI-powered tutoring, and granular scoring breakdowns. See our detailed comparison for a full side-by-side.