Intracranial injury Note: 7th characters D and S do not apply to codes in category S06 with 6th character 7 - death due to brain injury prior to regaining consciousness, or 8 - death due to other cause prior to regaining consciousness.Use additional code, if applicable, to identify mild neurocognitive disorders due to known physiological condition (F06.7-)Includes:traumatic brain injuryExcludes1head injury NOS (S09.90)The appropriate 7th character is to be added to each code from category S06A - initial encounterD - subsequent encounterS - sequela