Free Differential Diagnosis Practice Online

DailyDx is the best free tool for differential diagnosis practice. Each case presents progressive clinical clues and challenges you to identify the correct diagnosis, just like building a DDx on the wards.

How DDx Practice Works on DailyDx

You receive 5 clues one at a time: chief complaint, history, physical exam, labs, and a confirmatory finding. At each step, you can guess the diagnosis. Fewer clues needed means a higher score and stronger clinical reasoning.

900+ Cases Across 12 Specialties

Practice differential diagnosis in Cardiology, Pulmonology, GI, Renal, Neurology, Endocrine, Heme/Onc, Psychiatry, MSK/Rheum, Immunology, Infectious Disease, and Dermatology.

Track Your Progress

See your accuracy by specialty, maintain daily streaks, and identify weak areas. Duel friends to compare diagnostic skills.

Start practicing differential diagnosis