Step 3 • Live Practice

USMLE® Step 3 Computer-Based Case Simulations (CCS)

Timed orders, evolving vitals, labs that respond to your management, and outcome cues—right in your browser. Use these free CCS demo cases to see how MDSteps helps you practice Step 3-style management and clinical reasoning before test day.

Timed flow Live vitals Safety alerts Simple scoring
USMLE Step 3 CCS runner preview with vitals, labs, and orders interface

Practice the way you’ll be tested

Interactive CCS cases build decisive, exam-day management—not just checklists.

See vitals and labs respond

Fluids, pressors, insulin, O₂, and anticoagulation produce immediate, plausible changes.

Learn faster with feedback

Safety alerts and simple scoring highlight what mattered most and why.

ED • Inpatient • Clinic
Sepsis • DKA • PE • ACS • PPH • Asthma
Why-right / Why-wrong

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USMLE® Step 3 CCS Cases — Realistic, Runnable Practice

The USMLE Step 3 CCS portion tests how safely and efficiently you manage evolving patients—not just what you remember. MDSteps offers a live, browser-based CCS runner with timed orders, vitals and labs that respond to your actions, safety alerts for critical steps, and simple scoring so you can learn from each decision. Start with our free demos— Septic Shock, DKA, and Pulmonary Embolism—then unlock the full library when you’re ready.

What makes these CCS cases different?

  • Real-time reactive physiology: fluids, pressors, insulin, anticoagulation, and O₂ change MAP, HR, RR, SpO₂ and core labs.
  • Timed flow and orders that mirrors exam pressure: advance the clock or let it run—your time to critical actions affects outcomes.
  • Safety cues—not spoilers: gentle alerts for low MAP, delayed antibiotics, insulin before K, and D5 when glucose falls.
  • Focused learning: simple scoring and post-case signals reinforce what moved the needle and what was unnecessary.
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CCS — Common Questions

Timed decisions, order processing latency, dynamic vitals, and physiology-inspired rules for fluids, vasopressors, oxygen, insulin, antibiotics, and anticoagulation. Imaging and consults return on a clock.

We weight early recognition and safe stabilization (airway, breathing, circulation), time to antibiotics for sepsis, appropriate test selection, and disposition. Missed critical actions trigger deductions with feedback.

Yes. You can pause the timer; analytics track total elapsed case time for realism.

Each case ends with a timeline review and key pearls linked to guideline-style reasoning to reinforce what mattered and why.

Master your USMLE prep with MDSteps.

Practice exactly how you’ll be tested—adaptive QBank, live CCS, and clarity from your data.

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  • 50+ CCS cases with live vitals & scoring
  • Adaptive QBank with why-right/why-wrong rationales
  • Progress dashboard with readiness signals
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