G57.9
Unspecified mononeuropathy of lower limb
G57.9 is a non-billable ICD-10-CM code header for unspecified mononeuropathy 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 G57.90 Unspecified mononeuropathy of unspecified lower limb, G57.91 Unspecified mononeuropathy of right lower limb, G57.92 Unspecified mononeuropathy of left lower limb and G57.93 Unspecified mononeuropathy of bilateral lower limbs. Its coding notes include 6 Excludes1 entries and 8 Excludes2 entries.
Excludes1
Not coded here. The listed conditions generally should not be reported together.
- current traumatic nerve disorder - see nerve injury by body region
Excludes2
Not included here. Both codes may be reported if the patient has both conditions.
Also from chapter/block level (8 notes)
- 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)
Alphabetic Index terms
Terms the official Alphabetic Index lists for this code. 15 entries
- Mononeuritis, lower limb
- Mononeuropathy, lower limb
- Neuritis (rheumatoid), ilioinguinal (nerve)
- Neuroma, nonneoplastic, leg
- Neuroma, nonneoplastic, lower extremity
- Neuroma, surgical (nonneoplastic), leg
- Neuroma, surgical (nonneoplastic), lower extremity
- Neuropathy, neuropathic, leg NEC
- Neuropathy, neuropathic, lower extremity
- Paralysis, paralytic (complete) (incomplete), abductor, lower extremity
- Paralysis, paralytic (complete) (incomplete), ankle
- Paralysis, paralytic (complete) (incomplete), compression, leg