G57.21: Lesion of femoral nerve, right lower limb
G57.21, lesion of femoral nerve, right lower limb, is listed as a covered diagnosis in 8 Medicare billing and coding articles that apply to 62 HCPCS Level II codes, including G0283 (Electrical stimulation (unattended), to one or more areas…), L1844 (Knee orthosis, single upright, thigh and calf, with…), L1860 (Knee orthosis, modification of supracondylar prosthetic…). 47 of these codes have a 2026 DMEPOS fee schedule amount; L1844 pays $1,865.51 to $2,436.24 depending on the state. The articles come from 5 Medicare contractors. A listed diagnosis supports medical necessity only; coverage still depends on the LCD's criteria and on documentation in the medical record.
HCPCS Level II codes with G57.21 as a covered diagnosis
| Code | Description | Medicare coverage | DMEPOS fee 2026 (state range) | Articles listing it |
|---|---|---|---|---|
| G0283 | Electrical stimulation (unattended), to one or more areas for indication(s) other than wound care, as part of a therapy plan of care | Carrier judgment | — | 2 |
| L1844 | Knee orthosis, single upright, thigh and calf, with adjustable flexion and extension joint (unicentric or polycentric), medial-lateral and rotation control, with or without varus/valgus adjustment, custom fabricated | Carrier judgment | $1,865.51–$2,436.24 | 1 |
| L1860 | Knee orthosis, modification of supracondylar prosthetic socket, custom fabricated (sk) | Carrier judgment | $1,233.07–$1,985.94 | 1 |
| L1846 | Knee orthosis, double upright, thigh and calf, with adjustable flexion and extension joint (unicentric or polycentric), medial-lateral and rotation control, with or without varus/valgus adjustment, custom fabricated | Carrier judgment | $1,283.72–$1,960.17 | 1 |
| L1834 | Knee orthosis, without knee joint, rigid, custom fabricated | Carrier judgment | $892.02–$1,808.36 | 1 |
| L1832 | Knee orthosis, adjustable knee joints (unicentric or polycentric), positional orthosis, rigid support, prefabricated item that has been trimmed, bent, molded, assembled, or otherwise customized to fit a specific patient by an individual with expertise | Carrier judgment | $698.63–$1,618.03 | 1 |
| L1840 | Knee orthosis, derotation, medial-lateral, anterior cruciate ligament, custom fabricated | Carrier judgment | $1,056.60–$1,606.15 | 1 |
| L1843 | Knee orthosis, single upright, thigh and calf, with adjustable flexion and extension joint (unicentric or polycentric), medial-lateral and rotation control, with or without varus/valgus adjustment, prefabricated item that has been trimmed, bent, molded, assembled, or otherwise customized to fit a specific patient by an individual with expertise | Carrier judgment | $1,076.26–$1,183.90 | 1 |
| L1845 | Knee orthosis, double upright, thigh and calf, with adjustable flexion and extension joint (unicentric or polycentric), medial-lateral and rotation control, with or without varus/valgus adjustment, prefabricated item that has been trimmed, bent, molded, assembled, or otherwise customized to fit a specific patient by an individual with expertise | Carrier judgment | $939.24–$1,180.51 | 1 |
| L1833 | Knee orthosis, adjustable knee joints (unicentric or polycentric), positional orthosis, rigid support, prefabricated, off-the shelf | Carrier judgment | $455.16–$1,087.16 | 1 |
| L1851 | Knee orthosis (ko), single upright, thigh and calf, with adjustable flexion and extension joint (unicentric or polycentric), medial-lateral and rotation control, with or without varus/valgus adjustment, prefabricated, off-the-shelf | Carrier judgment | $600.78–$959.09 | 1 |
| L1852 | Knee orthosis (ko), double upright, thigh and calf, with adjustable flexion and extension joint (unicentric or polycentric), medial-lateral and rotation control, with or without varus/valgus adjustment, prefabricated, off-the-shelf | Carrier judgment | $573.13–$940.49 | 1 |
| L2330 | Addition to lower extremity, lacer molded to patient model, for custom fabricated orthosis only | Carrier judgment | $429.42–$904.14 | 1 |
| L1847 | Knee orthosis, double upright with adjustable joint, with inflatable air support chamber(s), prefabricated item that has been trimmed, bent, molded, assembled, or otherwise customized to fit a specific patient by an individual with expertise | Carrier judgment | $689.92–$827.89 | 1 |
| L1848 | Knee orthosis, double upright with adjustable joint, with inflatable air support chamber(s), prefabricated, off-the-shelf | Carrier judgment | $689.92–$827.89 | 1 |
| L1850 | Knee orthosis, swedish type, prefabricated, off-the-shelf | Carrier judgment | $205.78–$408.53 | 1 |
| L2820 | Addition to lower extremity orthosis, soft interface for molded plastic, below knee section | Carrier judgment | $99.79–$399.72 | 1 |
| L2830 | Addition to lower extremity orthosis, soft interface for molded plastic, above knee section | Carrier judgment | $107.96–$399.72 | 1 |
| L1831 | Knee orthosis, locking knee joint(s), positional orthosis, prefabricated, includes fitting and adjustment | Carrier judgment | $353.04–$388.33 | 1 |
| L2320 | Addition to lower extremity, non-molded lacer, for custom fabricated orthosis only | Carrier judgment | $236.44–$325.94 | 1 |
| L2395 | Addition to lower extremity, offset knee joint, heavy duty, each joint | Carrier judgment | $76.15–$251.19 | 1 |
| L2390 | Addition to lower extremity, offset knee joint, each joint | Carrier judgment | $76.15–$227.94 | 1 |
| L2385 | Addition to lower extremity, straight knee joint, heavy duty, each joint | Carrier judgment | $51.03–$225.93 | 1 |
| E1810 | Dynamic adjustable knee extension and flexion device, includes soft interface material | Carrier judgment | $142.48–$222.55 (RR) | 1 |
| E1813 | Dynamic adjustable knee extension only device, includes soft interface material | Carrier judgment | $142.48–$222.55 (RR) | 1 |
37 more codes are listed. See every code with payment by region in Caduvo.
Medicare policy articles listing G57.21
- A56034: Billing and Coding: Nerve Blockade for Treatment of Chronic Pain and Neuropathy (Noridian Healthcare Solutions, LLC (MAC - Part A, MAC - Part B); 2 Level II codes). LCD with the same title: L35456
- A57307: Billing and Coding: Nerve Conduction Studies and Electromyography (CGS Administrators, LLC (MAC - Part A, MAC - Part B); 1 Level II codes). LCD with the same title: L34594, L34859, L35048, L35081
- A57478: Billing and Coding: Nerve Conduction Studies and Electromyography (WPS Insurance Corporation (MAC - Part A, MAC - Part B); 1 Level II codes). LCD with the same title: L34594, L34859, L35048, L35081
- A54969: Billing and Coding: Nerve Conduction Studies and Electromyography (Noridian Healthcare Solutions, LLC (MAC - Part A, MAC - Part B); 1 Level II codes). LCD with the same title: L34594, L34859, L35048, L35081
- A57668: Billing and Coding: Nerve Conduction Studies and Electromyography (Wellpoint Federal (MAC - Part A, MAC - Part B); 1 Level II codes). LCD with the same title: L34594, L34859, L35048, L35081
- A56619: Billing and Coding: Nerve Conduction Studies and Electromyography (Palmetto GBA (MAC - Part A, MAC - Part B); 1 Level II codes). LCD with the same title: L34594, L34859, L35048, L35081
- A52465: Knee Orthoses - Policy Article (CGS Administrators, LLC (DME MAC) Noridian Healthcare Solutions, LLC (DME MAC); 53 Level II codes). LCD with the same title: L33318
- A57311: Billing and Coding: Physical Therapy - Home Health (CGS Administrators, LLC (HHH MAC); 7 Level II codes). LCD with the same title: L33942
A diagnosis listed as covered in a billing and coding article supports medical necessity for the article's codes; it does not guarantee payment. Coverage depends on the LCD's criteria, the contractor's jurisdiction and documentation in the medical record.
Other G57 diagnoses (Mononeuropathies of lower limb)
- G57.22 — Lesion of femoral nerve, left lower limb
- G57.23 — Lesion of femoral nerve, bilateral lower limbs
- 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
- G57.11 — Meralgia paresthetica, right lower limb
- G57.12 — Meralgia paresthetica, left lower limb
- G57.13 — Meralgia paresthetica, bilateral lower limbs
- 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
- G57.41 — 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
- G57.51 — Tarsal tunnel syndrome, right lower limb
- G57.52 — Tarsal tunnel syndrome, left lower limb
- G57.53 — Tarsal tunnel syndrome, bilateral lower limbs
- 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
- G57.71 — Causalgia of right lower limb
- G57.72 — Causalgia of left lower limb
- G57.73 — Causalgia of bilateral lower limbs
- 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
- G57.91 — Unspecified mononeuropathy of right lower limb
- G57.92 — Unspecified mononeuropathy of left lower limb
- G57.93 — Unspecified mononeuropathy of bilateral lower limbs
Frequently asked questions
Does Medicare cover G57.21 (Lesion of femoral nerve, right lower limb)?
Medicare covers items and services, not diagnoses. 8 Medicare billing and coding articles list G57.21 as a covered diagnosis for 62 HCPCS Level II codes: the diagnosis can support medical necessity for those codes, but payment still depends on the LCD's coverage criteria and the medical record.
Which HCPCS codes can be billed with ICD-10 G57.21?
The Level II codes from the policies most specific to this diagnosis are G0283 (Electrical stimulation (unattended), to one or more areas…, 2 articles); L1844 (Knee orthosis, single upright, thigh and calf, with…, 1 article); L1860 (Knee orthosis, modification of supracondylar prosthetic…, 1 article); L1846 (Knee orthosis, double upright, thigh and calf, with…, 1 article); L1834 (Knee orthosis, without knee joint, rigid, custom fabricated, 1 article). Code choice depends on the item supplied; check each code's descriptor.
What does Medicare pay for equipment billed with G57.21?
Under the 2026 DMEPOS fee schedule (non-rural state fees): L1844 $1,865.51 to $2,436.24; L1860 $1,233.07 to $1,985.94; L1846 $1,283.72 to $1,960.17; L1834 $892.02 to $1,808.36. Medicare pays 80% of the allowed amount after the Part B deductible.
Which Medicare policy articles list G57.21?
A56034 (Billing and Coding: Nerve Blockade for Treatment of Chronic Pain and Neuropathy); A57307 (Billing and Coding: Nerve Conduction Studies and Electromyography); A57478 (Billing and Coding: Nerve Conduction Studies and Electromyography), and 5 more articles.
What is ICD-10-CM code G57.21?
G57.21 is the ICD-10-CM code for lesion of femoral nerve, right lower limb, in category G57 (Mononeuropathies of lower limb), chapter 6: Diseases of the nervous system.
Next steps
- Run a reimbursement report for a device billed under G0283
- Watch G0283 for fee, coverage and descriptor changes
- Build a full Medicare revenue model for G0283
Sources: CMS Medicare Coverage Database billing and coding articles (covered ICD-10 code lists and HCPCS links); ICD-10-CM FY2026; CMS HCPCS Level II release October 2026; CMS DMEPOS fee schedule 2026 (non-rural state fees). Not billing or legal advice.
Chapter 6: Diseases of the nervous system · All diagnoses · HCPCS lookup