ICD-10-CM > F01-F99 > F01-F09 > F07 F07 Personality and behavioral disorders due to known physiological condition Non-Billable/Non-Specific Code First the underlying physiological condition Codes F07.0Personality change due to known physiological conditionF07.8Other personality and behavioral disorders due to known physiological conditionF07.81Postconcussional syndromeF07.89Other personality and behavioral disorders due to known physiological conditionF07.9Unspecified personality and behavioral disorder due to known physiological condition