+**F20** is a diagnostic code within the [ICD](/wiki/ICD) system, primarily designating [Schizophrenia](/wiki/Schizophrenia). This severe mental disorder profoundly disrupts thought, perception, emotion, and behavior, often leading to a distorted sense of reality.
+## See also
+- [Psychosis](/wiki/Psychosis)
+- [Delusion](/wiki/Delusion)
+- [Hallucination](/wiki/Hallucination)
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