2008 ICD-9-CM Volume 1 Diagnosis Codes Home > Mental Disorders 290-319 > Neurotic Disorders, Personality Disorders, And Other Nonpsychotic Mental Disorders 300-316 > ICD-9-CM Diagnosis 310 Specific nonpsychotic mental disorders due to brain damage 310 is a non-specific code that cannot be used to specify a diagnosis ICD-9-CM Diagnosis 310.0 Frontal lobe syndrome 310.0 is a specific code that can be used to specify a diagnosis 310.0 contains 14 index entries ICD-9-CM Diagnosis 310.1 Personality change due to conditions classified elsewhere 310.1 is a specific code that can be used to specify a diagnosis 310.1 contains 13 index entries ICD-9-CM Diagnosis 310.2 Postconcussion syndrome The organic and psychogenic disturbances observed after closed head injuries (HEAD INJURIES, CLOSED). Post-concussion syndrome includes subjective physical complaints (i.e. headache, dizziness), cognitive, emotional, and behavioral changes. These disturbances can be chronic, permanent, or late emerging. 310.2 is a specific code that can be used to specify a diagnosis 310.2 contains 19 index entries ICD-9-CM Diagnosis 310.8 Other specified nonpsychotic mental disorders following organic brain damage 310.8 is a specific code that can be used to specify a diagnosis 310.8 contains 9 index entries ICD-9-CM Diagnosis 310.9 Unspecified nonpsychotic mental disorder following organic brain damage 310.9 is a specific code that can be used to specify a diagnosis 310.9 contains 4 index entries