ICD-10-CM 2027
ICD-10 code for nerve lesion
From the official ICD-10-CM alphabetic index entry “Lesion (s) (nontraumatic) › nerve”. Page updated September 29, 2026.
About coding nerve lesion
The ICD-10-CM code for nerve lesion is G58.9 (Mononeuropathy, unspecified). The official index lists 8 more specific codes, so check the documentation for details such as type, cause, site or severity before settling on G58.9.
Within G58, choose G58.9 (Mononeuropathy, unspecified) only when documentation doesn't support a more specific option: intercostal neuropathy (G58.0), mononeuritis multiplex (G58.7) and other specified mononeuropathies (G58.8).
It is not a CC or MCC, so as a secondary diagnosis it doesn't change the MS-DRG severity level.
In MS-DRG v44.0, it is part of the grouping logic for DRG 073 (Cranial and Peripheral Nerve Disorders with MCC, relative weight 1.5779) and DRG 074 (Cranial and Peripheral Nerve Disorders without MCC, relative weight 1.0173), in MDC 01 (Diseases and Disorders of the Nervous System), as a principal or secondary diagnosis. The DRG a claim lands in depends on the principal diagnosis, procedures and any CC/MCC secondary diagnoses.
More specific nerve lesion codes (official index)
- femoral G57.2 — Lesion of femoral nerve
- median G56.1 — Other lesions of median nerve
- carpal tunnel syndrome
- plantar G57.6 — Lesion of plantar nerve
- popliteal (lateral) G57.3 — Lesion of lateral popliteal nerve
- medial G57.4 — Lesion of medial popliteal nerve
- radial G56.3 — Lesion of radial nerve
- sciatic G57.0 — Lesion of sciatic nerve
- spinal
- ulnar G56.2 — Lesion of ulnar nerve
Common questions about nerve lesion ICD-10 codes
What is the ICD-10 code for nerve lesion?
- G58.9 — Mononeuropathy, unspecified. More specific codes apply when the documentation supports them: G57.2, G56.1, G57.6, G57.3 and others below.
What is the ICD-10 code for femoral nerve lesion?
- G57.2 — Lesion of femoral nerve (header code; choose a more specific subcode).
What is the ICD-10 code for median nerve lesion?
- G56.1 — Other lesions of median nerve (header code; choose a more specific subcode).
What is the ICD-10 code for plantar nerve lesion?
- G57.6 — Lesion of plantar nerve (header code; choose a more specific subcode).
What is the ICD-10 code for popliteal nerve lesion?
- G57.3 — Lesion of lateral popliteal nerve (header code; choose a more specific subcode).
What is the ICD-10 code for radial nerve lesion?
- G56.3 — Lesion of radial nerve (header code; choose a more specific subcode).
What is the ICD-10 code for sciatic nerve lesion?
- G57.0 — Lesion of sciatic nerve (header code; choose a more specific subcode).
Is G58.9 billable?
- Yes. G58.9 is a billable/specific ICD-10-CM code valid for FY2027 (October 1, 2026 – September 30, 2027).
Can G58.9 be used as a principal diagnosis?
- Yes. The Medicare Code Editor doesn't restrict G58.9 as a principal diagnosis.
Is G58.9 a CC or MCC?
- No. G58.9 is neither a CC nor an MCC under MS-DRG v44.0.