G90 Disorders of autonomic nervous system
G91 Hydrocephalus
G92 Toxic encephalpathy
G93 Other disorders of brain
G94 Other disorders of brain in diseases classified elsewhere
G95 Other diseases of spinal cord
G96 Other disorders of central nervous system
G97 Postprocedural disorders of nervous system, not elsewhere classified
G98 Other disorders of nervous system, not elsewhere classified
G99 Other disorders of nervous system in diseases classified elsewhere