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