Mononeuropathies of lower limb (G57) ICD-10-CM
The G57 code range covers mononeuropathies of lower limb with 51 ICD-10-CM diagnosis codes. 40 of them are billable and valid for claim submission in fiscal year 2027, and the category headers group them but cannot themselves be billed.
Type 1 Excludes
A type 1 excludes note is a pure excludes note. It means "NOT CODED HERE!" An Excludes1 note indicates that the code excluded should never be used at the same time as the code above the Excludes1 note. An Excludes1 is used when two conditions cannot occur together, such as a congenital form versus an acquired form of the same condition.
- current traumatic nerve disorder - see nerve injury by body region
Codes in the G57 Range 51 codes · 40 billable
- G57 Mononeuropathies of lower limbNon-billable
- G57.0 Lesion of sciatic nerveNon-billable
- G57.00 Lesion of sciatic nerve, unspecified lower limb
- G57.01 Lesion of sciatic nerve, right lower limb
- G57.02 Lesion of sciatic nerve, left lower limb
- G57.03 Lesion of sciatic nerve, bilateral lower limbs
- G57.1 Meralgia parestheticaNon-billable
- G57.10 Meralgia paresthetica, unspecified lower limb
- G57.11 Meralgia paresthetica, right lower limb
- G57.12 Meralgia paresthetica, left lower limb
- G57.13 Meralgia paresthetica, bilateral lower limbs
- G57.2 Lesion of femoral nerveNon-billable
- G57.20 Lesion of femoral nerve, unspecified lower limb
- G57.21 Lesion of femoral nerve, right lower limb
- G57.22 Lesion of femoral nerve, left lower limb
- G57.23 Lesion of femoral nerve, bilateral lower limbs
- G57.3 Lesion of lateral popliteal nerveNon-billable
- G57.30 Lesion of lateral popliteal nerve, unspecified lower limb
- G57.31 Lesion of lateral popliteal nerve, right lower limb
- G57.32 Lesion of lateral popliteal nerve, left lower limb
- G57.33 Lesion of lateral popliteal nerve, bilateral lower limbs
- G57.4 Lesion of medial popliteal nerveNon-billable
- G57.40 Lesion of medial popliteal nerve, unspecified lower limb
- G57.41 Lesion of medial popliteal nerve, right lower limb
- G57.42 Lesion of medial popliteal nerve, left lower limb
- G57.43 Lesion of medial popliteal nerve, bilateral lower limbs
- G57.5 Tarsal tunnel syndromeNon-billable
- G57.50 Tarsal tunnel syndrome, unspecified lower limb
- G57.51 Tarsal tunnel syndrome, right lower limb
- G57.52 Tarsal tunnel syndrome, left lower limb
- G57.53 Tarsal tunnel syndrome, bilateral lower limbs
- G57.6 Lesion of plantar nerveNon-billable
- G57.60 Lesion of plantar nerve, unspecified lower limb
- G57.61 Lesion of plantar nerve, right lower limb
- G57.62 Lesion of plantar nerve, left lower limb
- G57.63 Lesion of plantar nerve, bilateral lower limbs
- G57.7 Causalgia of lower limbNon-billable
- G57.70 Causalgia of unspecified lower limb
- G57.71 Causalgia of right lower limb
- G57.72 Causalgia of left lower limb
- G57.73 Causalgia of bilateral lower limbs
- G57.8 Other specified mononeuropathies of lower limbNon-billable
- G57.80 Other specified mononeuropathies of unspecified lower limb
- G57.81 Other specified mononeuropathies of right lower limb
- G57.82 Other specified mononeuropathies of left lower limb
- G57.83 Other specified mononeuropathies of bilateral lower limbs
- G57.9 Unspecified mononeuropathy of lower limbNon-billable
- G57.90 Unspecified mononeuropathy of unspecified lower limb
- G57.91 Unspecified mononeuropathy of right lower limb
- G57.92 Unspecified mononeuropathy of left lower limb
- G57.93 Unspecified mononeuropathy of bilateral lower limbs
Clinical Terms in This Code Range
Definitions from the National Library of Medicine for conditions coded in the G57 range.
Morton Neuroma
A nerve inflammation in the foot caused by chronic compression of the plantar nerve between the METATARSAL BONES.
Tarsal Tunnel Syndrome
Entrapment of the distal branches of the posterior TIBIAL NERVE (which divides into the medial plantar, lateral plantar, and calcanial nerves) in the tarsal tunnel, which lies posterior to the internal malleolus and beneath the retinaculum of the flexor muscles of the foot. Symptoms include ankle pain radiating into the foot which tends to be aggravated by walking. Examination may reveal Tinel's sign (radiating pain following nerve percussion) over the tibial nerve at the ankle, weakness and atrophy of the small foot muscles, or loss of sensation in the foot. (From Foot Ankle 1990;11(1):47-52)
About the G57 Code Range
Mononeuropathies are disorders of individual nerves in the lower limbs. This category includes lesions of named nerves and several other named conditions.
The subdivisions distinguish sciatic nerve lesions (G57.0), meralgia paresthetica (G57.1), femoral nerve lesions (G57.2), and lateral and medial popliteal nerve lesions (G57.3 and G57.4). They also distinguish tarsal tunnel syndrome (G57.5), plantar nerve lesions (G57.6), causalgia (G57.7), and other specified or unspecified mononeuropathies (G57.8 and G57.9). Each subdivision further distinguishes the right, left, both, or an unspecified lower limb.
Questions About This Page
How many billable codes are in the G57 range?
Of the 51 codes in this range, 40 are billable and valid for claim submission from October 1, 2026 through September 30, 2027. Category header codes group them but cannot be reported on claims.
What does the G57 range classify?
The range classifies mononeuropathies of lower limb. Each code links to its own reference page with billing status, MS-DRG grouping, coding notes, and clinical information.
Related References
Source: CMS FY 2027 ICD-10-CM Tabular List and order file, effective October 1, 2026 through September 30, 2027.
