CLASSIFICATION OF DISEASES AND INJURIES
6. DISEASES OF THE NERVOUS SYSTEM AND SENSE ORGANS (320-389)
INFLAMMATORY DISEASES OF THE CENTRAL NERVOUS SYSTEM (320-326)
ORGANIC SLEEP DISORDERS (327)
HEREDITARY AND DEGENERATIVE DISEASES OF THE CENTRAL NERVOUS SYSTEM (330-337)
Excludes:
hepatolenticular degeneration (275.1)
multiple sclerosis (340)
other demyelinating diseases of central nervous system (341.0-341.9)
PAIN (338)
OTHER HEADACHE SYNDROMES (339)
OTHER DISORDERS OF THE CENTRAL NERVOUS SYSTEM (340-349)
DISORDERS OF THE PERIPHERAL NERVOUS SYSTEM (350-359)
Excludes:
diseases of:
acoustic [8th] nerve (388.5)
oculomotor [3rd, 4th, 6th] nerves (378.0-378.9)
optic [2nd] nerve (377.0-377.9)
peripheral autonomic nerves (337.0-337.9)
neuralgia NOS or "rheumatic" (729.2)
neuritis NOS or "rheumatic" (729.2)
radiculitis NOS or "rheumatic" (729.2)
peripheral neuritis in pregnancy (646.4)
DISORDERS OF THE EYE AND ADNEXA (360-379)
Use additional external cause code, if applicable, to identify the cause of the eye condition
DISEASES OF THE EAR AND MASTOID PROCESS (380-389)
Use additional external cause code, if applicable, to identify the cause of the ear condition

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