ICD-10-CM Book 2026 Edition

Chapters  /  Chapter 6  /  G50-G59

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

Excludes1: current traumatic nerve, nerve root and plexus disorders - see Injury, nerve by body region
neuralgia NOS (M79.2)
neuritis NOS (M79.2)
peripheral neuritis in pregnancy (O26.82-)
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
Excludes1 postherpetic geniculate ganglionitis (B02.21)
G51.2 Melkersson's syndrome
Melkersson-Rosenthal syndrome
G51.3 Clonic hemifacial spasm
G51.31 Clonic hemifacial spasm, right
G51.32 Clonic hemifacial spasm, left
G51.33 Clonic hemifacial spasm, bilateral
G51.39 Clonic hemifacial spasm, unspecified
G51.4 Facial myokymia
G51.8 Other disorders of facial nerve
G51.9 Disorder of facial nerve, unspecified
G52 Disorders of other cranial nerves
Excludes2 disorders of acoustic [8th] nerve (H93.3)
disorders of optic [2nd] nerve (H46, H47.0)
paralytic strabismus due to nerve palsy (H49.0-H49.2)
G52.0 Disorders of olfactory nerve
Disorders of 1st cranial nerve
G52.1 Disorders of glossopharyngeal nerve
Disorder of 9th cranial nerve
Glossopharyngeal neuralgia
G52.2 Disorders of vagus nerve
Disorders of pneumogastric [10th] nerve
G52.3 Disorders of hypoglossal nerve
Disorders 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
CodeFirst underlying disease, such as:
neoplasm (C00-D49)
Excludes1 multiple cranial nerve palsy in sarcoidosis (D86.82)
multiple cranial nerve palsy in syphilis (A52.15)
postherpetic geniculate ganglionitis (B02.21)
postherpetic trigeminal neuralgia (B02.22)
nonPrimary Yes
G54 Nerve root and plexus disorders
Excludes1 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 (M54.13)
neuritis or radiculitis lumbar NOS (M54.16)
neuritis or radiculitis lumbosacral NOS (M54.17)
neuritis or radiculitis thoracic NOS (M54.14)
radiculitis NOS (M54.10)
radiculopathy NOS (M54.10)
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
nonPrimary Yes
G54.4 Lumbosacral root disorders, not elsewhere classified
G54.5 Neuralgic amyotrophy
Parsonage-Aldren-Turner syndrome
Shoulder-girdle neuritis
Excludes1 neuralgic amyotrophy in diabetes mellitus (E08-E13 with .44)
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
CodeFirst underlying disease, such as:
neoplasm (C00-D49)
Excludes1 nerve root compression (due to) (in) ankylosing spondylitis (M45.-)
nerve root compression (due to) (in) dorsopathies (M53.-, M54.-)
nerve root compression (due to) (in) intervertebral disc disorders (M50.1.-, M51.1.-)
nerve root compression (due to) (in) spondylopathies (M46.-, M48.-)
nerve root compression (due to) (in) spondylosis (M47.0-, M47.2.-)
nonPrimary Yes
G56 Mononeuropathies of upper limb
Excludes1 current traumatic nerve disorder - see nerve injury by body region
G56.0 Carpal tunnel syndrome
G56.00 Carpal tunnel syndrome, unspecified upper limb
G56.01 Carpal tunnel syndrome, right upper limb
G56.02 Carpal tunnel syndrome, left upper limb
G56.03 Carpal tunnel syndrome, bilateral upper limbs
G56.1 Other lesions of median nerve
G56.10 Other lesions of median nerve, unspecified upper limb
G56.11 Other lesions of median nerve, right upper limb
G56.12 Other lesions of median nerve, left upper limb
G56.13 Other lesions of median nerve, bilateral upper limbs
G56.2 Lesion of ulnar nerve
Tardy ulnar nerve palsy
G56.20 Lesion of ulnar nerve, unspecified upper limb
G56.21 Lesion of ulnar nerve, right upper limb
G56.22 Lesion of ulnar nerve, left upper limb
G56.23 Lesion of ulnar nerve, bilateral upper limbs
G56.3 Lesion of radial nerve
G56.30 Lesion of radial nerve, unspecified upper limb
G56.31 Lesion of radial nerve, right upper limb
G56.32 Lesion of radial nerve, left upper limb
G56.33 Lesion of radial nerve, bilateral upper limbs
G56.4 Causalgia of upper limb
Complex regional pain syndrome II of upper limb
Excludes1 complex regional pain syndrome I of lower limb (G90.52-)
complex regional pain syndrome I of upper limb (G90.51-)
complex regional pain syndrome II of lower limb (G57.7-)
reflex sympathetic dystrophy of lower limb (G90.52-)
reflex sympathetic dystrophy of upper limb (G90.51-)
G56.40 Causalgia of unspecified upper limb
G56.41 Causalgia of right upper limb
G56.42 Causalgia of left upper limb
G56.43 Causalgia of bilateral upper limbs
G56.8 Other specified mononeuropathies of upper limb
Interdigital neuroma of upper limb
G56.80 Other specified mononeuropathies of unspecified upper limb
G56.81 Other specified mononeuropathies of right upper limb
G56.82 Other specified mononeuropathies of left upper limb
G56.83 Other specified mononeuropathies of bilateral upper limbs
G56.9 Unspecified mononeuropathy of upper limb
G56.90 Unspecified mononeuropathy of unspecified upper limb
G56.91 Unspecified mononeuropathy of right upper limb
G56.92 Unspecified mononeuropathy of left upper limb
G56.93 Unspecified mononeuropathy of bilateral upper limbs
G57 Mononeuropathies of lower limb
Excludes1 current traumatic nerve disorder - see nerve injury by body region
G57.0 Lesion of sciatic nerve
Excludes1 sciatica NOS (M54.3-)
Excludes2 sciatica attributed to intervertebral disc disorder (M51.1.-)
G57.00 Lesion of sciatic nerve, unspecified lower limb
G57.01 Lesion of sciatic nerve, right lower limb
G57.02 Lesion of sciatic nerve, left lower limb
G57.03 Lesion of sciatic nerve, bilateral lower limbs
G57.1 Meralgia paresthetica
Lateral cutaneous nerve of thigh syndrome
G57.10 Meralgia paresthetica, unspecified lower limb
G57.11 Meralgia paresthetica, right lower limb
G57.12 Meralgia paresthetica, left lower limb
G57.13 Meralgia paresthetica, bilateral lower limbs
G57.2 Lesion of femoral nerve
G57.20 Lesion of femoral nerve, unspecified lower limb
G57.21 Lesion of femoral nerve, right lower limb
G57.22 Lesion of femoral nerve, left lower limb
G57.23 Lesion of femoral nerve, bilateral lower limbs
G57.3 Lesion of lateral popliteal nerve
Peroneal nerve palsy
G57.30 Lesion of lateral popliteal nerve, unspecified lower limb
G57.31 Lesion of lateral popliteal nerve, right lower limb
G57.32 Lesion of lateral popliteal nerve, left lower limb
G57.33 Lesion of lateral popliteal nerve, bilateral lower limbs
G57.4 Lesion of medial popliteal nerve
G57.40 Lesion of medial popliteal nerve, unspecified lower limb
G57.41 Lesion of medial popliteal nerve, right lower limb
G57.42 Lesion of medial popliteal nerve, left lower limb
G57.43 Lesion of medial popliteal nerve, bilateral lower limbs
G57.5 Tarsal tunnel syndrome
G57.50 Tarsal tunnel syndrome, unspecified lower limb
G57.51 Tarsal tunnel syndrome, right lower limb
G57.52 Tarsal tunnel syndrome, left lower limb
G57.53 Tarsal tunnel syndrome, bilateral lower limbs
G57.6 Lesion of plantar nerve
Morton's metatarsalgia
G57.60 Lesion of plantar nerve, unspecified lower limb
G57.61 Lesion of plantar nerve, right lower limb
G57.62 Lesion of plantar nerve, left lower limb
G57.63 Lesion of plantar nerve, bilateral lower limbs
G57.7 Causalgia of lower limb
Complex regional pain syndrome II of lower limb
Excludes1 complex regional pain syndrome I of lower limb (G90.52-)
complex regional pain syndrome I of upper limb (G90.51-)
complex regional pain syndrome II of upper limb (G56.4-)
reflex sympathetic dystrophy of lower limb (G90.52-)
reflex sympathetic dystrophy of upper limb (G90.51-)
G57.70 Causalgia of unspecified lower limb
G57.71 Causalgia of right lower limb
G57.72 Causalgia of left lower limb
G57.73 Causalgia of bilateral lower limbs
G57.8 Other specified mononeuropathies of lower limb
Interdigital neuroma of lower limb
G57.80 Other specified mononeuropathies of unspecified lower limb
G57.81 Other specified mononeuropathies of right lower limb
G57.82 Other specified mononeuropathies of left lower limb
G57.83 Other specified mononeuropathies of bilateral lower limbs
G57.9 Unspecified mononeuropathy of lower limb
G57.90 Unspecified mononeuropathy of unspecified lower limb
G57.91 Unspecified mononeuropathy of right lower limb
G57.92 Unspecified mononeuropathy of left lower limb
G57.93 Unspecified mononeuropathy of bilateral lower limbs
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
CodeFirst underlying disease
Excludes1 diabetic mononeuropathy (E08-E13 with .41)
syphilitic nerve paralysis (A52.19)
syphilitic neuritis (A52.15)
tuberculous mononeuropathy (A17.83)
nonPrimary Yes