Chapter VI
Diseases of the nervous system
(G00-G99)

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

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

G50 Disorders of trigeminal nerve

Incl.:
disorders of 5th cranial nerve
G50.0 Trigeminal neuralgia
Incl.:
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

Incl.:
disorders of 7th cranial nerve
G51.0 Bell palsy
Incl.:
Facial palsy
G51.1 Geniculate ganglionitis
Excl.:
postherpetic geniculate ganglionitis ( B02.2)
G51.2 Melkersson syndrome
Incl.:
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

Excl.:
disorders of:
paralytic strabismus due to nerve palsy ( H49.0-H49.2)
G52.0 Disorders of olfactory nerve
Incl.:
Disorder of 1st cranial nerve
G52.1 Disorders of glossopharyngeal nerve
Incl.:
Disorder of 9th cranial nerve
Glossopharyngeal neuralgia
G52.2 Disorders of vagus nerve
Incl.:
Disorder of pneumogastric [10th] nerve
G52.3 Disorders of hypoglossal nerve
Incl.:
Disorder of 12th cranial nerve
G52.7 Disorders of multiple cranial nerves
Incl.:
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†)
Incl.:
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

Excl.:
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:
radiculitis NOS ( M54.1)
radiculopathy NOS ( M54.1)
spondylosis ( M47.-)
G54.0 Brachial plexus disorders
Incl.:
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
Incl.:
Parsonage-Aldren-Turner syndrome
Shoulder-girdle neuritis
G54.6 Phantom limb syndrome with pain
G54.7 Phantom limb syndrome without pain
Incl.:
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

Excl.:
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
Incl.:
Tardy ulnar nerve palsy
G56.3 Lesion of radial nerve
G56.4 Causalgia
G56.8 Other mononeuropathies of upper limb
Incl.:
Interdigital neuroma of upper limb
G56.9 Mononeuropathy of upper limb, unspecified

G57 Mononeuropathies of lower limb

Excl.:
current traumatic nerve disorder - see nerve injury by body region
G57.0 Lesion of sciatic nerve
Excl.:
sciatica:
  • NOS (M54.3)
  • attributed to intervertebral disc disorder (M51.1)
G57.1 Meralgia paraesthetica
Incl.:
Lateral cutaneous nerve of thigh syndrome
G57.2 Lesion of femoral nerve
G57.3 Lesion of lateral popliteal nerve
Incl.:
Peroneal nerve palsy
G57.4 Lesion of medial popliteal nerve
G57.5 Tarsal tunnel syndrome
G57.6 Lesion of plantar nerve
Incl.:
Morton metatarsalgia
G57.8 Other mononeuropathies of lower limb
Incl.:
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