ICD-10 Logo
ICDxICD-10 Medical Coding
ICD-10 Logo
ICDxICD-10 Medical Coding
ICD 10 CodesDiagnoses
ICD 10 CodesDiagnoses
ICD-10 Logo
ICDxICD-10 Medical Coding

Comprehensive ICD-10-CM code reference with AI-powered search capabilities.

© 2025 ICD Code Compass. All rights reserved.

Browse

  • All Chapters
  • All Categories
  • Diagnoses

Tools

  • AI Code Search
ICD-10-CM codes are maintained by the CDC and CMS. This tool is for reference purposes only.
v1.0.0
ICD-10 Guide
ICD-10 CodesG57.40

G57.40

Billable

Lesion of medial popliteal nerve, unspecified lower limb

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

Code Description

ICD-10 G57.40 is a billable code used to indicate a diagnosis of lesion of medial popliteal nerve, unspecified lower limb.

Key Diagnostic Point:

The medial popliteal nerve is a branch of the sciatic nerve that innervates the muscles and skin of the posterior aspect of the lower leg and foot. A lesion of this nerve can result from various causes, including trauma, compression, or systemic diseases such as diabetes. Clinically, patients may present with symptoms such as pain, weakness, or sensory loss in the affected lower limb. The diagnosis often involves a thorough clinical examination, nerve conduction studies, and imaging to assess for any underlying structural abnormalities. The unspecified nature of this code indicates that the specific cause or type of lesion has not been determined, which may complicate treatment and management strategies. Accurate coding is essential for appropriate reimbursement and to reflect the complexity of the patient's condition.

Code Complexity Analysis

Complexity Rating: Medium

Medium Complexity

Complexity Factors

  • Unspecified nature of the lesion complicates diagnosis.
  • Potential overlap with other neuropathies and nerve entrapments.
  • Need for comprehensive documentation to support the diagnosis.
  • Variability in clinical presentation among patients.

Audit Risk Factors

  • Insufficient documentation of symptoms and clinical findings.
  • Failure to specify the side of the lesion when applicable.
  • Inadequate justification for the use of unspecified codes.
  • Lack of supporting diagnostic tests such as nerve conduction studies.

Specialty Focus

Medical Specialties

Neurology

Documentation Requirements

Detailed neurological examination findings, results of nerve conduction studies, and imaging reports.

Common Clinical Scenarios

Patients presenting with lower limb weakness, pain, or sensory changes following trauma or systemic illness.

Billing Considerations

Neurologists should document the specific nature of the lesion and any differential diagnoses considered.

Orthopedics

Documentation Requirements

Surgical notes, imaging studies, and pre-operative assessments.

Common Clinical Scenarios

Patients with knee injuries or surgeries that may impact the medial popliteal nerve.

Billing Considerations

Orthopedic surgeons should ensure that any nerve involvement is clearly documented in surgical reports.

Coding Guidelines

Inclusion Criteria

Use G57.40 When
  • According to ICD
  • 10 coding guidelines, this code should be used when the lesion of the medial popliteal nerve is confirmed but not specified
  • Coders must ensure that the documentation supports the diagnosis and that all relevant clinical information is included

Exclusion Criteria

Do NOT use G57.40 When
No specific exclusions found.

Related ICD-10 Codes

Related CPT Codes

95903CPT Code

Nerve conduction study, motor

Clinical Scenario

Used to evaluate the function of the medial popliteal nerve in patients with suspected lesions.

Documentation Requirements

Results of the nerve conduction study must be documented, including latencies and amplitudes.

Specialty Considerations

Neurologists should ensure that the study is justified based on 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 granularity of data collected for research and treatment outcomes. G57.40 provides a clear designation for unspecified lesions, which can help in tracking and managing patient care.

ICD-9 vs ICD-10

The transition to ICD-10 has allowed for more specific coding of nerve lesions, improving the granularity of data collected for research and treatment outcomes. G57.40 provides a clear designation for unspecified lesions, which can help in tracking and managing patient care.

Reimbursement & Billing Impact

The transition to ICD-10 has allowed for more specific coding of nerve lesions, improving the granularity of data collected for research and treatment outcomes. G57.40 provides a clear designation for unspecified lesions, which can help in tracking and managing patient care.

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 should I document to support the use of G57.40?

Document the patient's symptoms, clinical findings, results of any diagnostic tests, and the rationale for using the unspecified code. Ensure that the documentation reflects the complexity of the patient's condition.