2026 ICD-10-CM Diagnosis Code G57Mononeuropathies of lower limb

ICD-10-CM Codes›G00–G99›G50-G59›G57

ICD-10-CM G57
CMSSource: CMS FY 2026 ICD-10-CM dataset · Effective Oct 1, 2025 – Sep 30, 2026

G57 is a non-billable ICD-10-CM category code for mononeuropathies of lower limb, so it cannot be submitted on claims. Use a more specific code from this category instead, such as G57.00, G57.01, G57.02, and G57.03.

Code Identity

ICD-10-CM Code
G57
Billable Status
No — Non-Billable Category
Code Describes
Mononeuropathies of lower limb
Chapter
G50-G59
Nerve, nerve root and plexus disorders

Code Classification

ChapterG00–G99Diseases of the nervous system
SectionG50-G59Nerve, nerve root and plexus disorders
CategoryG57Mononeuropathies of lower limb
This CodeG57Mononeuropathies of lower limb

Specific Coding for Mononeuropathies of lower limbOverview

Non-specific codes like G57 require more characters. Use one of these billable codes instead:

  • G57.0 for Lesion of sciatic nerve

  • Use G57.00 for Lesion of sciatic nerve, unspecified lower limb

  • Use G57.01 for Lesion of sciatic nerve, right lower limb

  • Use G57.02 for Lesion of sciatic nerve, left lower limb

  • Use G57.03 for Lesion of sciatic nerve, bilateral lower limbs

  • G57.1 for Meralgia paresthetica

  • Use G57.10 for Meralgia paresthetica, unspecified lower limb

  • Use G57.11 for Meralgia paresthetica, right lower limb

  • Use G57.12 for Meralgia paresthetica, left lower limb

  • Use G57.13 for Meralgia paresthetica, bilateral lower limbs

  • G57.2 for Lesion of femoral nerve

  • Use G57.20 for Lesion of femoral nerve, unspecified lower limb

  • Use G57.21 for Lesion of femoral nerve, right lower limb

  • Use G57.22 for Lesion of femoral nerve, left lower limb

  • Use G57.23 for Lesion of femoral nerve, bilateral lower limbs

  • G57.3 for Lesion of lateral popliteal nerve

  • Use G57.30 for Lesion of lateral popliteal nerve, unspecified lower limb

  • Use G57.31 for Lesion of lateral popliteal nerve, right lower limb

  • Use G57.32 for Lesion of lateral popliteal nerve, left lower limb

  • Use G57.33 for Lesion of lateral popliteal nerve, bilateral lower limbs

  • G57.4 for Lesion of medial popliteal nerve

  • Use G57.40 for Lesion of medial popliteal nerve, unspecified lower limb

  • Use G57.41 for Lesion of medial popliteal nerve, right lower limb

  • Use G57.42 for Lesion of medial popliteal nerve, left lower limb

  • Use G57.43 for Lesion of medial popliteal nerve, bilateral lower limbs

  • G57.5 for Tarsal tunnel syndrome

  • Use G57.50 for Tarsal tunnel syndrome, unspecified lower limb

  • Use G57.51 for Tarsal tunnel syndrome, right lower limb

  • Use G57.52 for Tarsal tunnel syndrome, left lower limb

  • Use G57.53 for Tarsal tunnel syndrome, bilateral lower limbs

  • G57.6 for Lesion of plantar nerve

  • Use G57.60 for Lesion of plantar nerve, unspecified lower limb

  • Use G57.61 for Lesion of plantar nerve, right lower limb

  • Use G57.62 for Lesion of plantar nerve, left lower limb

  • Use G57.63 for Lesion of plantar nerve, bilateral lower limbs

  • G57.7 for Causalgia of lower limb

  • Use G57.70 for Causalgia of unspecified lower limb

  • Use G57.71 for Causalgia of right lower limb

  • Use G57.72 for Causalgia of left lower limb

  • Use G57.73 for Causalgia of bilateral lower limbs

  • G57.8 for Other specified mononeuropathies of lower limb

  • Use G57.80 for Other specified mononeuropathies of unspecified lower limb

  • Use G57.81 for Other specified mononeuropathies of right lower limb

  • Use G57.82 for Other specified mononeuropathies of left lower limb

  • Use G57.83 for Other specified mononeuropathies of bilateral lower limbs

  • G57.9 for Unspecified mononeuropathy of lower limb

  • Use G57.90 for Unspecified mononeuropathy of unspecified lower limb

  • Use G57.91 for Unspecified mononeuropathy of right lower limb

  • Use G57.92 for Unspecified mononeuropathy of left lower limb

  • Use G57.93 for Unspecified mononeuropathy of bilateral lower limbs

Tabular List NotesGuidance

Coding notes and annotation back-references applicable to this code.

Type 1 Excludes

  • current traumatic nerve disorder - see nerve injury by body region

Patient EducationClinical

Peripheral Nerve Disorders

Nerves are like wires that carry messages back and forth between your brain and your body. Your peripheral nerves branch off from your brain and spinal cord and connect to all parts of your body, including your muscles and organs.

The full article covers:

  • What are peripheral nerves?
  • What are peripheral nerve disorders?
  • What causes peripheral nerve disorders?
  • What are the symptoms of peripheral nerve disorders?
  • How are peripheral nerve disorders diagnosed?
  • What are the treatments for peripheral nerve disorders?
  • Can peripheral nerve disorders be prevented?

Read the full article at MedlinePlus

Courtesy of MedlinePlus, a service of the U.S. National Library of Medicine.

Code HistoryHistory

FY 2016AddedAdded to the ICD-10-CM code setEffective October 1, 2015, the first year of ICD-10-CM.
FY 2017–2025No changes
FY 2026CurrentCurrent code set, no changesEffective October 1, 2025 through September 30, 2026.

Questions About G57Overview

Is G57 (Mononeuropathies of lower limb) a billable code?

No. This is a category header that groups the codes for mononeuropathies of lower limb, and headers cannot be submitted on claims. Claims for mononeuropathies of lower limb need a more specific code from this category, such as G57.00, G57.01, and G57.02.