Alphabetic Index FY2027

G57

Mononeuropathies of lower limb

FY2027Chapter 6: Diseases of the nervous system/G50–G59 Nerve, nerve root and plexus disorders

Non-billable headerNot valid on its own. Use one of the more specific codes under it.

G57 is a non-billable ICD-10-CM code category for mononeuropathies of lower limb. Report a more specific code from it instead. It is part of the FY2027 code set, effective October 1, 2026. The more specific codes under it are G57.0 Lesion of sciatic nerve, G57.1 Meralgia paresthetica, G57.2 Lesion of femoral nerve, G57.3 Lesion of lateral popliteal nerve and 6 more. Its coding notes include 6 Excludes1 entries and 8 Excludes2 entries.

Excludes1

Not coded here. The listed conditions generally should not be reported together.

This code
  • current traumatic nerve disorder - see nerve injury by body region
Also from chapter/block level (5 notes)
Inherited from G50–G59 Nerve, nerve root and plexus disorders
  • 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-)

Excludes2

Not included here. Both codes may be reported if the patient has both conditions.

Also from chapter/block level (8 notes)
Inherited from Chapter 6 Diseases of the nervous system
  • certain conditions originating in the perinatal period (P04-P96)
  • certain infectious and parasitic diseases (A00-B99)
  • complications of pregnancy, childbirth and the puerperium (O00-O9A)
  • congenital malformations, deformations, and chromosomal abnormalities (Q00-Q99)
  • endocrine, nutritional and metabolic diseases (E00-E88)
  • injury, poisoning and certain other consequences of external causes (S00-T88)
  • neoplasms (C00-D49)
  • symptoms, signs and abnormal clinical and laboratory findings, not elsewhere classified (R00-R94)

More specific codes under G57 10