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    OpenPayerBilling CodesNerve, nerve root and plexus disordersICD-10-CM g57-mononeuropathies-of-lower-limb
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    ICD-10-CM Code For Mononeuropathies Of Lower Limb: Group Overview

    The International Classification of Diseases, Tenth Revision, Clinical Modification (ICD-10-CM) code group G57 includes mononeuropathies of the lower limb, covering focal peripheral nerve disorders such as peroneal, tibial, and other lower extremity nerve entrapments, injuries, and inflammations that produce sensory and motor deficits. These ICD-10-CM diagnosis codes are used to document clinical scenarios including nerve compression, trauma, ischemic injury, or neuropathic pain that affect function of the leg, ankle, or foot, capturing disease location and severity. Accurate coding within the ICD-10-CM G57 group supports complete clinical documentation and appropriate reimbursement.

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    ICD-10-CM G57: Mononeuropathies Of Lower Limb Overview

    The ICD-10-CM G57 group includes codes for mononeuropathies affecting peripheral nerves of the lower limb, such as peroneal and tibial nerve involvement. These diagnoses target the peripheral nervous system and describe focal nerve injury, entrapment, or inflammation that produces sensorimotor deficits in the leg or foot. Accurate coding matters for reimbursement because it documents the specific nerve affected and clinical severity, which supports correct claim adjudication.

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    When to Use

    Assign a code from this group when a clinician documents a diagnosed mononeuropathy localized to a lower extremity nerve, such as foot drop from common peroneal nerve injury or tarsal tunnel syndrome affecting the tibial nerve. Use the most specific code available that indicates the exact nerve and laterality when documented to reflect clinical detail.

    ICD-10-CM Codes

    40 rows

    ICD-10-CM CodeDescription
    G57.00Lesion of sciatic nerve, unspecified lower limb
    G57.01Lesion of sciatic nerve, right lower limb
    G57.02Lesion of sciatic nerve, left lower limb
    G57.03Lesion of sciatic nerve, bilateral lower limbs
    G57.10Meralgia paresthetica, unspecified lower limb
    G57.11Meralgia paresthetica, right lower limb
    G57.12Meralgia paresthetica, left lower limb
    G57.13Meralgia paresthetica, bilateral lower limbs
    G57.20Lesion of femoral nerve, unspecified lower limb
    G57.21Lesion of femoral nerve, right lower limb
    G57.22Lesion of femoral nerve, left lower limb
    G57.23Lesion of femoral nerve, bilateral lower limbs
    G57.30Lesion of lateral popliteal nerve, unspecified lower limb
    G57.31Lesion of lateral popliteal nerve, right lower limb
    G57.32Lesion of lateral popliteal nerve, left lower limb
    G57.33Lesion of lateral popliteal nerve, bilateral lower limbs
    G57.40Lesion of medial popliteal nerve, unspecified lower limb
    G57.41Lesion of medial popliteal nerve, right lower limb
    G57.42Lesion of medial popliteal nerve, left lower limb
    G57.43Lesion of medial popliteal nerve, bilateral lower limbs

    Showing 1–20 of 40

    DRG Codes

    2 rows

    DRG CodeDescription
    073Cranial and Peripheral Nerve Disorders with MCC
    074Cranial and Peripheral Nerve Disorders without MCC

    Typical Clinical Scenarios

    • A middle-aged construction worker presents to urgent care after acute onset of sharp lateral foot pain, numbness on the dorsum of the foot, and weakness when dorsiflexing following a knee hyperextension injury earlier that day. Examination shows foot drop and decreased sensation in the distribution of the common peroneal nerve; electrodiagnostic testing or clinical exam supports a mononeuropathy caused by nerve stretch/compression. A code from the group for peroneal nerve involvement is assigned to capture the acute mononeuropathy. Typical codes: G57.00, G57.01
    • An elderly patient with long-standing poorly controlled diabetes reports progressive burning pain, tingling, and numbness localized to the plantar surface of the foot and toes that has been worsening over months, interfering with sleep and ambulation. The chronic neuropathic symptoms are limited to a specific lower-extremity nerve distribution consistent with a focal mononeuropathy rather than generalized polyneuropathy; outpatient evaluation attributes the focal process to diabetic mononeuropathy of the tibial/plantar branches. A specific lower-limb mononeuropathy code is used to document the chronic neuropathic complication. Typical codes: G57.20, G57.21
    • A postoperative patient develops new unilateral posterior thigh burning pain and weakness several days after a hip replacement; imaging excludes hematoma but exam shows sensory loss and diminished knee flexion consistent with sciatic nerve branch involvement from intraoperative traction or compression. The clinician documents a postoperative mononeuropathy of the lower limb as a complication of the surgical procedure, and a code identifying the affected nerve is assigned for the complication/comorbidity. Typical codes: G57.30, G57.31

    Related Codes

    G50-DISORDERS-OF-TRIGEMINAL-NERVE

    ICD-10-CM Code For Disorders Of Trigeminal Nerve: Group Overview

    G51-FACIAL-NERVE-DISORDERS

    ICD-10-CM Code For Facial Nerve Disorders: Group Overview

    G52-DISORDERS-OF-OTHER-CRANIAL-NERVES

    ICD-10-CM Code For Disorders Of Other Cranial Nerves: Group Overview

    G53-CRANIAL-NERVE-DISORDERS

    ICD-10-CM Code For Cranial Nerve Disorders In Diseases Classified Elsewhere: Group Overview

    G54-NERVE-ROOT-AND-PLEXUS-DISORDERS

    ICD-10-CM Code For Nerve Root And Plexus Disorders: Group Overview

    G55-NERVE-ROOT-AND-PLEXUS-COMPRESSIONS

    ICD-10-CM Code For Nerve Root And Plexus Compressions In Diseases Classified Elsewhere: Group Overview

    G56-MONONEUROPATHIES-OF-UPPER-LIMB

    ICD-10-CM Code For Mononeuropathies Of Upper Limb: Group Overview

    G58-OTHER-MONONEUROPATHIES

    ICD-10-CM Code For Other Mononeuropathies: Group Overview

    G59-MONONEUROPATHY-IN-DISEASES

    ICD-10-CM Code For Mononeuropathy In Diseases Classified Elsewhere: Group Overview

    Frequently Asked Questions

    References

    1. 1.CPT® Codes and Descriptions. AAPC. Retrieved Aug 11, 2026.Maintains the CPT code set's official descriptions and guidelines, licensed from the American Medical Association, used as the definitional source for CPT codes on this page.
    2. 2.HCPCS Quarterly Update. Centers for Medicare & Medicaid Services (CMS). Retrieved Aug 11, 2026.CMS's quarterly release of HCPCS Level II codes and short/long descriptors, the source for HCPCS code definitions and update history.
    3. 3.ICD-10-CM Full Code List. Centers for Medicare & Medicaid Services (CMS). Retrieved Aug 11, 2026.CMS's complete ICD-10-CM diagnosis code list, used to cross-reference diagnosis codes associated with this procedure or service.
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