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Clinical Reasoning Platform

Think like a clinician.
Reason like an expert.

Three integrated modes — coaching, cases, and mechanisms. Move between them freely. The system tracks where you are and brings you back.

Browse Cases & Topics →
Try: "anaphylaxis", "HAE", "drug allergy", "chest pain", "SBAR"
Three Modes. One Learning Arc.
The Core of ReasonDx

Each mode is complete on its own — and more powerful when connected. Jump between them freely.

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AI Coaching
CoachDx

Your AI attending. CoachDx doesn't give you answers — it asks the questions that force you to find them, adapting in real time to your reasoning gaps.

  • Socratic coaching on any topic or concept
  • Free-text case or question discussion
  • Knowledge gap targeting & follow-up
  • DDx challenge from any chief complaint
Start Coaching
200+ topics
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Structured Cases
ReasonDx Cases

Structured patient scenarios with branching reasoning pathways. Work history, exam, workup, and management — see where your thinking diverges from expert reasoning.

  • Branching case narratives with checkpoints
  • Full EMR-style simulation environment
  • Reasoning pathway fingerprint tracking
  • Post-case debrief & reflection
Open a Case
80+ cases
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Pathophysiology
MechanismDx

Visual pathophysiology modules that connect basic science to bedside reasoning. When you understand the mechanism, the clinical picture stops being memorization.

  • Interactive mechanism cards with spaced rep
  • Embryology & development module suites
  • Guideline-anchored, open-access content
  • Return directly to your case or session
Explore Mechanisms
36 modules
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Move between modes without losing your place

Struggling with a mechanism mid-coaching session? Jump to MechanismDx — your question stays open. Hit a pathophys wall mid-case? Same thing. Every transition is logged as a gap and surfaced through spaced repetition.

🧑‍⚕️ CoachDx 🔬 MechanismDx 🩺 Cases
Every gap and bridge is logged to your Reasoning Fingerprint for spaced repetition review
Also in ReasonDx
Supporting Components

These power the cases and coaching — access them directly or reach them naturally through a session.

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Case & Topic Library

Browse all 325+ cases by specialty and clinical setting. Pick a topic and launch into any of the three modes from one place.

325+ cases · 29 specialties · ED, Floor, Clinic, ICU
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Case Trainers & Scenarios

The structured reasoning scaffolds that power ReasonDx cases — SBAR handoffs, consultant callbacks, and diagnostic frameworks.

79 trainers · SBAR · Callbacks · Frameworks
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Morning Rounds — SimRoomDx

Present your patient to the attending. AI characters ask questions and push back on your reasoning in real time.

23 scenarios · 6 AI characters
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Night Float

Cross-cover overnight call. Manage a patient list, respond to nurse pages, handle decompensations, and practice I-PASS handoff.

Randomized or topic-based lists
The Learning Arc
How a Session Works

Start anywhere. The system meets you there.

1
Pick a topic or let the system choose

Search for a diagnosis, browse the Case Library, or ask CoachDx to target your weakest area. No rigid curriculum — you lead.

2
Work through it in one or all three modes

Coach → Case → Mechanism in any order. Hit a gap and the system surfaces a bridge. Your session context travels with you.

3
Your gaps become your next session

Every bridge taken, every hesitation logged — built into your Reasoning Fingerprint and returned through spaced repetition until mastered.

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Need to review the mechanism?
Jump to MechanismDx — your session is saved here when you return.