Chapter VI

Diseases of the nervous system
(G00-G99)

Nerve, nerve root and plexus disorders
(G50-G59)


Excludes:	current traumatic nerve, nerve root and plexus disorders - see nerve injury by body region
	neuralgia neuritis			} }	NOS ( M79.2 )
	peripheral neuritis in pregnancy ( O26.8 ) radiculitis NOS ( M54.1 )


G50		Disorders of trigeminal nerve
		Includes:	disorders of 5th cranial nerve
G50.0		Trigeminal neuralgia
		Syndrome of paroxysmal facial pain Tic douloureux
G50.1		Atypical facial pain
G50.8		Other disorders of trigeminal nerve
G50.9		Disorder of trigeminal nerve, unspecified


G51		Facial nerve disorders
		Includes:	disorders of 7th cranial nerve
G51.0		Bell's palsy
		Facial palsy
G51.1		Geniculate ganglionitis
		Excludes:	postherpetic geniculate ganglionitis ( B02.2 )
G51.2		Melkersson's syndrome
		Melkersson-Rosenthal syndrome
G51.3		Clonic hemifacial spasm
G51.4		Facial myokymia
G51.8		Other disorders of facial nerve
G51.9		Disorder of facial nerve, unspecified


G52		Disorders of other cranial nerves
		Excludes:	disorders of: · acoustic [8th] nerve ( H93.3 ) · optic [2nd] nerve ( H46 , H47.0 ) paralytic strabismus due to nerve palsy ( H49.0-H49.2 )
G52.0		Disorders of olfactory nerve
		Disorder of 1st cranial nerve
G52.1		Disorders of glossopharyngeal nerve
		Disorder of 9th cranial nerve Glossopharyngeal neuralgia
G52.2		Disorders of vagus nerve
		Disorder of pneumogastric [10th] nerve
G52.3		Disorders of hypoglossal nerve
		Disorder of 12th cranial nerve
G52.7		Disorders of multiple cranial nerves
		Polyneuritis cranialis
G52.8		Disorders of other specified cranial nerves
G52.9		Cranial nerve disorder, unspecified


G53*		Cranial nerve disorders in diseases classified elsewhere
G53.0*		Postzoster neuralgia ( B02.2+ )
		Postherpetic: · geniculate ganglionitis · trigeminal neuralgia
G53.1*		Multiple cranial nerve palsies in infectious and parasitic diseases classified elsewhere ( A00-B99+ )
G53.2*		Multiple cranial nerve palsies in sarcoidosis ( D86.8+ )
G53.3*		Multiple cranial nerve palsies in neoplastic disease ( C00-D48+ )
G53.8*		Other cranial nerve disorders in other diseases classified elsewhere


G54		Nerve root and plexus disorders
		Excludes:	current traumatic nerve root and plexus disorders - see nerve injury by body region intervertebral disc disorders ( M50-M51 ) neuralgia or neuritis NOS ( M79.2 )
			neuritis or radiculitis: · brachial NOS · lumbar NOS · lumbosacral NOS · thoracic NOS radiculitis NOS radiculopathy NOS			} } } } } } }	( M54.1 )
			spondylosis ( M47.- )
G54.0		Brachial plexus disorders
		Thoracic outlet syndrome
G54.1		Lumbosacral plexus disorders
G54.2		Cervical root disorders, not elsewhere classified
G54.3		Thoracic root disorders, not elsewhere classified
G54.4		Lumbosacral root disorders, not elsewhere classified
G54.5		Neuralgic amyotrophy
		Parsonage-Aldren-Turner syndrome Shoulder-girdle neuritis
G54.6		Phantom limb syndrome with pain
G54.7		Phantom limb syndrome without pain
		Phantom limb syndrome NOS
G54.8		Other nerve root and plexus disorders
G54.9		Nerve root and plexus disorder, unspecified


G55*		Nerve root and plexus compressions in diseases classified elsewhere
G55.0*		Nerve root and plexus compressions in neoplastic disease ( C00-D48+ )
G55.1*		Nerve root and plexus compressions in intervertebral disc disorders ( M50-M51+ )
G55.2*		Nerve root and plexus compressions in spondylosis ( M47.-+ )
G55.3*		Nerve root and plexus compressions in other dorsopathies ( M45-M46+ , M48.-+ , M53-M54+ )
G55.8*		Nerve root and plexus compressions in other diseases classified elsewhere


G56		Mononeuropathies of upper limb
		Excludes:	current traumatic nerve disorder - see nerve injury by body region
G56.0		Carpal tunnel syndrome
G56.1		Other lesions of median nerve
G56.2		Lesion of ulnar nerve
		Tardy ulnar nerve palsy
G56.3		Lesion of radial nerve
G56.4		Causalgia
G56.8		Other mononeuropathies of upper limb
		Interdigital neuroma of upper limb
G56.9		Mononeuropathy of upper limb, unspecified


G57		Mononeuropathies of lower limb
		Excludes:	current traumatic nerve disorder - see nerve injury by body region
G57.0		Lesion of sciatic nerve
		Excludes:	sciatica: · NOS ( M54.3 ) · attributed to intervertebral disc disorder ( M51.1 )
G57.1		Meralgia paraesthetica
		Lateral cutaneous nerve of thigh syndrome
G57.2		Lesion of femoral nerve
G57.3		Lesion of lateral popliteal nerve
		Peroneal nerve palsy
G57.4		Lesion of medial popliteal nerve
G57.5		Tarsal tunnel syndrome
G57.6		Lesion of plantar nerve
		Morton's metatarsalgia
G57.8		Other mononeuropathies of lower limb
		Interdigital neuroma of lower limb
G57.9		Mononeuropathy of lower limb, unspecified


G58		Other mononeuropathies
G58.0		Intercostal neuropathy
G58.7		Mononeuritis multiplex
G58.8		Other specified mononeuropathies
G58.9		Mononeuropathy, unspecified


G59*		Mononeuropathy in diseases classified elsewhere
G59.0*		Diabetic mononeuropathy (E10-E14+ with common fourth character .4)
G59.8*		Other mononeuropathies in diseases classified elsewhere