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ICD-10 Guide
ICD-10 CodesG57.31

G57.31

Billable

Lesion of lateral popliteal nerve, right lower limb

BILLABLE STATUSYes
IMPLEMENTATION DATEOctober 1, 2015
LAST UPDATED09/05/2025

Code Description

ICD-10 G57.31 is a billable code used to indicate a diagnosis of lesion of lateral popliteal nerve, right lower limb.

Key Diagnostic Point:

The lateral popliteal nerve, also known as the common peroneal nerve, is a branch of the sciatic nerve that innervates the muscles of the lower leg and foot. A lesion of this nerve can result from various causes, including trauma, compression, or entrapment, leading to motor and sensory deficits in the right lower limb. Clinically, patients may present with foot drop, weakness in ankle dorsiflexion, and sensory loss over the dorsum of the foot and lateral aspect of the leg. The condition can arise from prolonged pressure on the nerve, such as from crossing the legs, or from external compression due to tumors or swelling. Diagnosis typically involves a thorough clinical examination, nerve conduction studies, and possibly imaging studies to identify the underlying cause of the nerve lesion. Treatment may include physical therapy, orthotic devices, and in some cases, surgical intervention to relieve compression or repair the nerve. Accurate coding is essential for proper reimbursement and to reflect the complexity of the patient's condition.

Code Complexity Analysis

Complexity Rating: Medium

Medium Complexity

Complexity Factors

  • Differentiating between various types of nerve lesions
  • Understanding the anatomical location and function of the lateral popliteal nerve
  • Identifying the underlying cause of the lesion (trauma, compression, etc.)
  • Documenting associated symptoms and functional impairments

Audit Risk Factors

  • Inadequate documentation of the clinical findings
  • Failure to specify the laterality of the condition
  • Lack of supporting evidence for the diagnosis from nerve conduction studies
  • Incorrect coding of associated conditions or symptoms

Specialty Focus

Medical Specialties

Neurology

Documentation Requirements

Detailed neurological examination findings, including motor and sensory assessments.

Common Clinical Scenarios

Patients presenting with foot drop, numbness, or weakness in the lower limb.

Billing Considerations

Ensure that nerve conduction studies are documented and interpreted correctly.

Orthopedics

Documentation Requirements

Surgical notes if intervention is performed, imaging results, and pre-operative assessments.

Common Clinical Scenarios

Patients with traumatic injuries leading to nerve lesions or those requiring surgical decompression.

Billing Considerations

Document any orthopedic interventions that may impact nerve function.

Coding Guidelines

Inclusion Criteria

Use G57.31 When
  • According to ICD
  • 10 coding guidelines, G57
  • 31 should be used when there is a confirmed diagnosis of a lesion of the lateral popliteal nerve in the right lower limb
  • Documentation must support the diagnosis, including clinical findings and any relevant diagnostic tests

Exclusion Criteria

Do NOT use G57.31 When
No specific exclusions found.

Related ICD-10 Codes

Related CPT Codes

95900CPT Code

Nerve conduction studies, upper or lower limb

Clinical Scenario

Used to confirm the diagnosis of lateral popliteal nerve lesion.

Documentation Requirements

Results of nerve conduction studies must be documented in the patient's medical record.

Specialty Considerations

Neurologists should ensure that the studies are interpreted correctly and correlate with clinical findings.

ICD-10 Impact

Diagnostic & Documentation Impact

Enhanced Specificity

ICD-10 Improvements

The transition to ICD-10 has allowed for more specific coding of nerve lesions, improving the accuracy of diagnoses and facilitating better patient management. G57.31 provides a clear classification for lateral popliteal nerve lesions, which aids in treatment planning and reimbursement.

ICD-9 vs ICD-10

The transition to ICD-10 has allowed for more specific coding of nerve lesions, improving the accuracy of diagnoses and facilitating better patient management. G57.31 provides a clear classification for lateral popliteal nerve lesions, which aids in treatment planning and reimbursement.

Reimbursement & Billing Impact

reimbursement.

Resources

Clinical References

  • •
    ICD-10-CM Official Guidelines for Coding and Reporting

Coding & Billing References

  • •
    ICD-10-CM Official Guidelines for Coding and Reporting

Frequently Asked Questions

What are the common causes of lateral popliteal nerve lesions?

Common causes include trauma, compression from prolonged sitting or crossing legs, and conditions such as diabetes that may lead to neuropathy.