ICD-10-CM Section · G50-G59
Nerve, nerve root and plexus disorders
131 codes in this section
131
Total Codes
106
Billable
25
Header (Non-Billable)
10
Top-Level Codes
About Section G50-G59
Section G50-G59 (G50-G59) covers nerve, nerve root and plexus disorders. It sits within the Diseases of the nervous system chapter (G00-G99). This section contains 131 ICD-10-CM codes, 106 billable diagnoses you can submit on a claim, and 25 non-billable header codes used to organize the hierarchy.
Codes are organized below by 3-character root. Click the root to see all subcodes underneath it, or click any individual code for full coverage data, payer policies, and linked CPT procedures.
Codes in G50-G59
Grouped by 3-character root code. Click any code for full detail.
G50
Disorders of trigeminal nerve
4 subcodes
| G50.0 | Trigeminal neuralgia | Billable |
| G50.1 | Atypical facial pain | Billable |
| G50.8 | Other disorders of trigeminal nerve | Billable |
| G50.9 | Disorder of trigeminal nerve, unspecified | Billable |
G51
Facial nerve disorders
11 subcodes
| G51.0 | Bell's palsy | Billable |
| G51.1 | Geniculate ganglionitis | Billable |
| G51.2 | Melkersson's syndrome | Billable |
| G51.3 | Clonic hemifacial spasm | Header |
| G51.31 | Clonic hemifacial spasm, right | Billable |
| G51.32 | Clonic hemifacial spasm, left | Billable |
| G51.33 | Clonic hemifacial spasm, bilateral | Billable |
| G51.39 | Clonic hemifacial spasm, unspecified | Billable |
| G51.4 | Facial myokymia | Billable |
| G51.8 | Other disorders of facial nerve | Billable |
| G51.9 | Disorder of facial nerve, unspecified | Billable |
G52
Disorders of other cranial nerves
7 subcodes
| G52.0 | Disorders of olfactory nerve | Billable |
| G52.1 | Disorders of glossopharyngeal nerve | Billable |
| G52.2 | Disorders of vagus nerve | Billable |
| G52.3 | Disorders of hypoglossal nerve | Billable |
| G52.7 | Disorders of multiple cranial nerves | Billable |
| G52.8 | Disorders of other specified cranial nerves | Billable |
| G52.9 | Cranial nerve disorder, unspecified | Billable |
G53
Cranial nerve disorders in diseases classified elsewhere
0 subcodes
G54
Nerve root and plexus disorders
10 subcodes
| G54.0 | Brachial plexus disorders | Billable |
| G54.1 | Lumbosacral plexus disorders | Billable |
| G54.2 | Cervical root disorders, not elsewhere classified | Billable |
| G54.3 | Thoracic root disorders, not elsewhere classified | Billable |
| G54.4 | Lumbosacral root disorders, not elsewhere classified | Billable |
| G54.5 | Neuralgic amyotrophy | Billable |
| G54.6 | Phantom limb syndrome with pain | Billable |
| G54.7 | Phantom limb syndrome without pain | Billable |
| G54.8 | Other nerve root and plexus disorders | Billable |
| G54.9 | Nerve root and plexus disorder, unspecified | Billable |
G55
Nerve root and plexus compressions in diseases classified elsewhere
0 subcodes
G56
Mononeuropathies of upper limb
35 subcodes
| G56.0 | Carpal tunnel syndrome | Header |
| G56.00 | Carpal tunnel syndrome, unspecified upper limb | Billable |
| G56.01 | Carpal tunnel syndrome, right upper limb | Billable |
| G56.02 | Carpal tunnel syndrome, left upper limb | Billable |
| G56.03 | Carpal tunnel syndrome, bilateral upper limbs | Billable |
| G56.1 | Other lesions of median nerve | Header |
| G56.10 | Other lesions of median nerve, unspecified upper limb | Billable |
| G56.11 | Other lesions of median nerve, right upper limb | Billable |
| G56.12 | Other lesions of median nerve, left upper limb | Billable |
| G56.13 | Other lesions of median nerve, bilateral upper limbs | Billable |
| G56.2 | Lesion of ulnar nerve | Header |
| G56.20 | Lesion of ulnar nerve, unspecified upper limb | Billable |
| G56.21 | Lesion of ulnar nerve, right upper limb | Billable |
| G56.22 | Lesion of ulnar nerve, left upper limb | Billable |
| G56.23 | Lesion of ulnar nerve, bilateral upper limbs | Billable |
| G56.3 | Lesion of radial nerve | Header |
| G56.30 | Lesion of radial nerve, unspecified upper limb | Billable |
| G56.31 | Lesion of radial nerve, right upper limb | Billable |
| G56.32 | Lesion of radial nerve, left upper limb | Billable |
| G56.33 | Lesion of radial nerve, bilateral upper limbs | Billable |
| G56.4 | Causalgia of upper limb | Header |
| G56.40 | Causalgia of unspecified upper limb | Billable |
| G56.41 | Causalgia of right upper limb | Billable |
| G56.42 | Causalgia of left upper limb | Billable |
| G56.43 | Causalgia of bilateral upper limbs | Billable |
| G56.8 | Other specified mononeuropathies of upper limb | Header |
| G56.80 | Other specified mononeuropathies of unspecified upper limb | Billable |
| G56.81 | Other specified mononeuropathies of right upper limb | Billable |
| G56.82 | Other specified mononeuropathies of left upper limb | Billable |
| G56.83 | Other specified mononeuropathies of bilateral upper limbs | Billable |
| G56.9 | Unspecified mononeuropathy of upper limb | Header |
| G56.90 | Unspecified mononeuropathy of unspecified upper limb | Billable |
| G56.91 | Unspecified mononeuropathy of right upper limb | Billable |
| G56.92 | Unspecified mononeuropathy of left upper limb | Billable |
| G56.93 | Unspecified mononeuropathy of bilateral upper limbs | Billable |
G57
Mononeuropathies of lower limb
50 subcodes
| G57.0 | Lesion of sciatic nerve | Header |
| G57.00 | Lesion of sciatic nerve, unspecified lower limb | Billable |
| G57.01 | Lesion of sciatic nerve, right lower limb | Billable |
| G57.02 | Lesion of sciatic nerve, left lower limb | Billable |
| G57.03 | Lesion of sciatic nerve, bilateral lower limbs | Billable |
| G57.1 | Meralgia paresthetica | Header |
| G57.10 | Meralgia paresthetica, unspecified lower limb | Billable |
| G57.11 | Meralgia paresthetica, right lower limb | Billable |
| G57.12 | Meralgia paresthetica, left lower limb | Billable |
| G57.13 | Meralgia paresthetica, bilateral lower limbs | Billable |
| G57.2 | Lesion of femoral nerve | Header |
| G57.20 | Lesion of femoral nerve, unspecified lower limb | Billable |
| G57.21 | Lesion of femoral nerve, right lower limb | Billable |
| G57.22 | Lesion of femoral nerve, left lower limb | Billable |
| G57.23 | Lesion of femoral nerve, bilateral lower limbs | Billable |
| G57.3 | Lesion of lateral popliteal nerve | Header |
| G57.30 | Lesion of lateral popliteal nerve, unspecified lower limb | Billable |
| G57.31 | Lesion of lateral popliteal nerve, right lower limb | Billable |
| G57.32 | Lesion of lateral popliteal nerve, left lower limb | Billable |
| G57.33 | Lesion of lateral popliteal nerve, bilateral lower limbs | Billable |
| G57.4 | Lesion of medial popliteal nerve | Header |
| G57.40 | Lesion of medial popliteal nerve, unspecified lower limb | Billable |
| G57.41 | Lesion of medial popliteal nerve, right lower limb | Billable |
| G57.42 | Lesion of medial popliteal nerve, left lower limb | Billable |
| G57.43 | Lesion of medial popliteal nerve, bilateral lower limbs | Billable |
| G57.5 | Tarsal tunnel syndrome | Header |
| G57.50 | Tarsal tunnel syndrome, unspecified lower limb | Billable |
| G57.51 | Tarsal tunnel syndrome, right lower limb | Billable |
| G57.52 | Tarsal tunnel syndrome, left lower limb | Billable |
| G57.53 | Tarsal tunnel syndrome, bilateral lower limbs | Billable |
| G57.6 | Lesion of plantar nerve | Header |
| G57.60 | Lesion of plantar nerve, unspecified lower limb | Billable |
| G57.61 | Lesion of plantar nerve, right lower limb | Billable |
| G57.62 | Lesion of plantar nerve, left lower limb | Billable |
| G57.63 | Lesion of plantar nerve, bilateral lower limbs | Billable |
| G57.7 | Causalgia of lower limb | Header |
| G57.70 | Causalgia of unspecified lower limb | Billable |
| G57.71 | Causalgia of right lower limb | Billable |
| G57.72 | Causalgia of left lower limb | Billable |
| G57.73 | Causalgia of bilateral lower limbs | Billable |
| G57.8 | Other specified mononeuropathies of lower limb | Header |
| G57.80 | Other specified mononeuropathies of unspecified lower limb | Billable |
| G57.81 | Other specified mononeuropathies of right lower limb | Billable |
| G57.82 | Other specified mononeuropathies of left lower limb | Billable |
| G57.83 | Other specified mononeuropathies of bilateral lower limbs | Billable |
| G57.9 | Unspecified mononeuropathy of lower limb | Header |
| G57.90 | Unspecified mononeuropathy of unspecified lower limb | Billable |
| G57.91 | Unspecified mononeuropathy of right lower limb | Billable |
| G57.92 | Unspecified mononeuropathy of left lower limb | Billable |
| G57.93 | Unspecified mononeuropathy of bilateral lower limbs | Billable |
G58
Other mononeuropathies
4 subcodes
| G58.0 | Intercostal neuropathy | Billable |
| G58.7 | Mononeuritis multiplex | Billable |
| G58.8 | Other specified mononeuropathies | Billable |
| G58.9 | Mononeuropathy, unspecified | Billable |
G59
Mononeuropathy in diseases classified elsewhere
0 subcodes
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Verified against the CMS 2026 code set on May 31, 2026.
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