G56: Mononeuropathies of upper limb
Codes under G56 (Mononeuropathies of upper limb). A ✓ marks a billable (fully specified) code; category codes without a ✓ are not billable on their own.
| Code | Description | Billable |
|---|---|---|
| G56.0 | Carpal tunnel syndrome | — |
| G56.0 | Carpal tunnel syndrome | — |
| G56.00 | Carpal tunnel syndrome, unspecified upper limb | ✓ |
| G56.00 | Carpal tunnel syndrome, unspecified upper limb | ✓ |
| G56.01 | Carpal tunnel syndrome, right upper limb | ✓ |
| G56.01 | Carpal tunnel syndrome, right upper limb | ✓ |
| G56.1 | Other lesions of median nerve | — |
| G56.1 | Other lesions of median nerve | — |
| G56.02 | Carpal tunnel syndrome, left upper limb | ✓ |
| G56.02 | Carpal tunnel syndrome, left upper limb | ✓ |
| G56.2 | Lesion of ulnar nerve | — |
| G56.2 | Lesion of ulnar nerve | — |
| G56.03 | Carpal tunnel syndrome, bilateral upper limbs | ✓ |
| G56.03 | Carpal tunnel syndrome, bilateral upper limbs | ✓ |
| G56.3 | Lesion of radial nerve | — |
| G56.3 | Lesion of radial nerve | — |
| G56.4 | Causalgia of upper limb | — |
| G56.4 | Causalgia of upper limb | — |
| G56.8 | Other specified mononeuropathies of upper limb | — |
| G56.8 | Other specified mononeuropathies of upper limb | — |
| G56.9 | Unspecified mononeuropathy of upper limb | — |
| G56.9 | Unspecified mononeuropathy of upper limb | — |
| G56.10 | Other lesions of median nerve, unspecified upper limb | ✓ |
| G56.10 | Other lesions of median nerve, unspecified upper limb | ✓ |
| G56.11 | Other lesions of median nerve, right upper limb | ✓ |
| G56.11 | Other lesions of median nerve, right upper limb | ✓ |
| G56.12 | Other lesions of median nerve, left upper limb | ✓ |
| G56.12 | Other lesions of median nerve, left upper limb | ✓ |
| G56.13 | Other lesions of median nerve, bilateral upper limbs | ✓ |
| G56.13 | Other lesions of median nerve, bilateral upper limbs | ✓ |
| G56.20 | Lesion of ulnar nerve, unspecified upper limb | ✓ |
| G56.20 | Lesion of ulnar nerve, unspecified upper limb | ✓ |
| G56.21 | Lesion of ulnar nerve, right upper limb | ✓ |
| G56.21 | Lesion of ulnar nerve, right upper limb | ✓ |
| G56.22 | Lesion of ulnar nerve, left upper limb | ✓ |
| G56.22 | Lesion of ulnar nerve, left upper limb | ✓ |
| G56.23 | Lesion of ulnar nerve, bilateral upper limbs | ✓ |
| G56.23 | Lesion of ulnar nerve, bilateral upper limbs | ✓ |
| G56.30 | Lesion of radial nerve, unspecified upper limb | ✓ |
| G56.30 | Lesion of radial nerve, unspecified upper limb | ✓ |
| G56.31 | Lesion of radial nerve, right upper limb | ✓ |
| G56.31 | Lesion of radial nerve, right upper limb | ✓ |
| G56.32 | Lesion of radial nerve, left upper limb | ✓ |
| G56.32 | Lesion of radial nerve, left upper limb | ✓ |
| G56.33 | Lesion of radial nerve, bilateral upper limbs | ✓ |
| G56.33 | Lesion of radial nerve, bilateral upper limbs | ✓ |
| G56.40 | Causalgia of unspecified upper limb | ✓ |
| G56.40 | Causalgia of unspecified upper limb | ✓ |
| G56.41 | Causalgia of right upper limb | ✓ |
| G56.41 | Causalgia of right upper limb | ✓ |
| G56.42 | Causalgia of left upper limb | ✓ |
| G56.42 | Causalgia of left upper limb | ✓ |
| G56.43 | Causalgia of bilateral upper limbs | ✓ |
| G56.43 | Causalgia of bilateral upper limbs | ✓ |
| G56.80 | Other specified mononeuropathies of unspecified upper limb | ✓ |
| G56.80 | Other specified mononeuropathies of unspecified upper limb | ✓ |
| G56.81 | Other specified mononeuropathies of right upper limb | ✓ |
| G56.81 | Other specified mononeuropathies of right upper limb | ✓ |
| G56.82 | Other specified mononeuropathies of left upper limb | ✓ |
| G56.82 | Other specified mononeuropathies of left upper limb | ✓ |
| G56.83 | Other specified mononeuropathies of bilateral upper limbs | ✓ |
| G56.83 | Other specified mononeuropathies of bilateral upper limbs | ✓ |
| G56.90 | Unspecified mononeuropathy of unspecified upper limb | ✓ |
| G56.90 | Unspecified mononeuropathy of unspecified upper limb | ✓ |
| G56.91 | Unspecified mononeuropathy of right upper limb | ✓ |
| G56.91 | Unspecified mononeuropathy of right upper limb | ✓ |
| G56.92 | Unspecified mononeuropathy of left upper limb | ✓ |
| G56.92 | Unspecified mononeuropathy of left upper limb | ✓ |
| G56.93 | Unspecified mononeuropathy of bilateral upper limbs | ✓ |
| G56.93 | Unspecified mononeuropathy of bilateral upper limbs | ✓ |
Frequently asked questions
What is ICD-10-CM code G56?
G56 is an ICD-10-CM category covering Mononeuropathies of upper limb. It contains 70 more specific diagnosis codes, 56 of which are billable.
Is G56 a billable code?
No — G56 is a category header and isn't billable on its own. Code to the highest level of specificity using one of its subcodes (for example G56.0 — Carpal tunnel syndrome). 56 of the 70 codes under G56 are billable.
What codes fall under G56?
G56 includes G56.0, G56.0, G56.00, G56.00, G56.01, plus 65 more. See the full list with descriptions and billable status above.
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Informational only, not coding or medical advice. Verify against the official ICD-10-CM (FY2026) and your payer's guidelines.
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