G57 – Mononeuropathies of lower limb

ICD-10-CM 2027 diagnosis code · Nerve, nerve root and plexus disorders

Non-billable header

ICD-10-CM code G57

Code: G57 (claims format: G57)
Description: Mononeuropathies of lower limb
Billable: No – use a more specific code below
Valid for: Dates of service October 1, 2026 – September 30, 2027 (FY2027)
Chapter: 6. Diseases of the nervous system (G00-G99)
Block: G50-G59 Nerve, nerve root and plexus disorders

Billable codes under G57

G57 is a header code and cannot be used on claims. Choose the most specific code:

G57.0 – Lesion of sciatic nerveHeader (more codes below)
G57.1 – Meralgia parestheticaHeader (more codes below)
G57.2 – Lesion of femoral nerveHeader (more codes below)
G57.3 – Lesion of lateral popliteal nerveHeader (more codes below)
G57.4 – Lesion of medial popliteal nerveHeader (more codes below)
G57.5 – Tarsal tunnel syndromeHeader (more codes below)
G57.6 – Lesion of plantar nerveHeader (more codes below)
G57.7 – Causalgia of lower limbHeader (more codes below)
G57.8 – Other specified mononeuropathies of lower limbHeader (more codes below)
G57.9 – Unspecified mononeuropathy of lower limbHeader (more codes below)

Notes for G57

Excludes1 (not coded here):

current traumatic nerve disorder - see nerve injury by body region

Notes inherited from parent codes

Instructional notes at a category or block level apply to every code below it.

Block G50-G59

Excludes1 (not coded here):

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-)

Frequently asked questions

What is ICD-10 code G57?

G57 is the ICD-10-CM code for mononeuropathies of lower limb, in the block G50-G59 (Nerve, nerve root and plexus disorders).

Is G57 a billable code?

No. G57 is a header code with more specific child codes; report one of the billable codes listed above.

Source: CDC/NCHS ICD-10-CM FY2027 code files, tabular list and index. Reference only – code assignment must follow the official ICD-10-CM guidelines and documentation in the medical record.