Symptom Checkers

Symptom checkers provide patients with a fast way to identify possible causes for their medical symptoms. A study by the British Medical Journal in 2015 evaluated online symptom checkers for diagnostic accuracy. We used the study's findings and additional research to assemble this list of the best free symptom checkers on the web.

  • Ada
    Well designed and easy-to-use question-based symptom checker. - Registration Required, App Only
  • Family Doctor
    Easy to use symptom checker that provided a 56% diagnostic accuracy score.
  • Isabel
    Relied upon by doctors and nurses around the world. Diagnostic accuracy of 69%.
  • ShareCare: AskMD
    Highly rated at 69% accuracy. Be prepared to share a lot of personal health information. - Registration Required
  • SymCAT
    Probability-based diagnostic tool that factors in patient history. Diagnosis with 71% accuracy.

Additional Tools

  • Healthline: Symptom Browser
    Browse available condition articles by symptoms.
  • Mayo Clinic
    Choose your primary symptom and select related factors to narrow potential medical conditions.
  • MouthHealthy
    Online diagnostic tool for identifying possible oral health conditions.
  • Skinsight
    High quality dermatology information site offering a rash and skin condition identifier tool.
  • Symptomate
    Conversation-themed symptom checker from Infermedica.
  • WebMD Symptom Checker
    Web's most popular symptom checker. Identify conditions based on symptoms and medical history.
  • Your.MD
    Easy to use chat-based symptom checker.