500+
Clinical Cases
10
Health Professions
100%
Free to Use
The Problem
Most education teaches what to think, not how to think
Traditional learning gives you knowledge. Clinical practice demands reasoning. ReasonDx bridges that gap.
Traditional Approach
✗ Read about diseases in textbooks
✗ Memorize diagnostic criteria
✗ Answer multiple choice questions
✗ Hope it transfers to real patients
ReasonDx Approach
✓ Patient arrives with symptoms
✓ You decide what to ask and order
✓ AI patient responds like a real person
✓ You learn from doing, not reading
How It Works
Learn by doing — one case at a time
Pick a case, work through it like a real patient encounter, get feedback. No login required to start.
1
Pick a case from 394 options
Browse by specialty (cardiology, pulmonary, neuro, etc.), urgency level, or profession. Each case is based on real clinical presentations.
Browse Cases →
2
Interview the AI patient
Ask questions just like you would in clinic. The AI patient responds naturally based on their case — you won't get cookie-cutter answers. Use voice or type your questions.
See How It Works →
3
Build your differential, order tests, make decisions
Work through 10 phases: history, physical exam, differential diagnosis, testing, diagnosis, treatment, disposition. Each phase builds on the last.
4
Get AI feedback on your reasoning
After each case, an AI attending reviews your work — not just if you got the diagnosis right, but how you got there. Learn what you did well and what to work on.
Inside a Case
10 phases that mirror real clinical workflow
Each simulation walks you through the complete diagnostic process, from first impression to final disposition.
Phase 1-2
Intro & History
Read the presentation, interview the AI patient
Phase 3
Physical Exam
Select exam findings from 18 templates
Phase 4
Differential
Build and rank your DDx from 670+ diagnoses
Phase 5-6
Tests & Diagnosis
Order workup, interpret results, commit to diagnosis
Phase 7-10
Management & Debrief
Treatment plan, disposition, AI feedback, reflection
Four Ways to Learn
Use what fits your schedule
Every feature is free. Switch between modes based on what you need right now.
Simulate
Full clinical cases with AI patients. Interview, diagnose, treat. 10-20 minutes per case.
500+ cases
Practice EMR
Same cases, but practice writing clinical notes. No AI — just documentation skill-building.
SOAP notes
Ask CoachDx
Chat with an AI attending about any diagnosis or concept. Socratic teaching, not answers.
130+ coaching topics
Learn Mechanisms
Pathophysiology deep-dives. Understand why diseases work the way they do.
53 modules
Which mode is right for you?
Two different ways to build clinical reasoning — pick what fits your goal right now.
🩺
Simulation
Conversation with Dr. Patel
- ✓10-phase Socratic dialogue
- ✓Builds differential in real time
- ✓Detects cognitive bias live
- ✓15–30 minutes per case
- ✓Best for: reasoning practice
🏥
Virtual EMR
Chart-based encounter
- ✓Full patient chart to review
- ✓Write and submit a note
- ✓Faculty grading + feedback
- ✓30–60 minutes per case
- ✓Best for: documentation + OSCE prep
Start learning in 60 seconds
Pick a case. Interview the patient. See how you did. It's that simple.