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 CodesG57.90

G57.90

Billable

Unspecified mononeuropathy of unspecified lower limb

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

Code Description

ICD-10 G57.90 is a billable code used to indicate a diagnosis of unspecified mononeuropathy of unspecified lower limb.

Key Diagnostic Point:

Unspecified mononeuropathy of the lower limb refers to a condition characterized by damage or dysfunction of a single peripheral nerve in the lower extremity, leading to symptoms such as pain, weakness, numbness, or tingling. This condition can arise from various etiologies, including trauma, compression, or systemic diseases. The term 'unspecified' indicates that the exact nerve affected is not documented, which can complicate diagnosis and treatment. Common causes include nerve entrapments, such as tarsal tunnel syndrome or peroneal nerve compression, and systemic conditions like diabetes mellitus that can lead to neuropathic changes. Diagnosis typically involves a thorough clinical evaluation, including a detailed history and physical examination, followed by nerve conduction studies to assess the function of the affected nerve. Treatment may vary based on the underlying cause and can include physical therapy, medications for pain management, or surgical intervention in cases of entrapment. 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

  • Lack of specificity regarding the affected nerve
  • Variability in clinical presentation and underlying causes
  • Need for comprehensive documentation to support the diagnosis
  • Potential overlap with other neuropathic conditions

Audit Risk Factors

  • Insufficient documentation of symptoms and clinical findings
  • Failure to specify the affected nerve when possible
  • Inconsistent coding practices across providers
  • Lack of supporting diagnostic tests in the medical record

Specialty Focus

Medical Specialties

Neurology

Documentation Requirements

Detailed neurological examination findings, including sensory and motor assessments.

Common Clinical Scenarios

Patients presenting with unilateral leg weakness, numbness, or pain.

Billing Considerations

Ensure documentation includes the patient's history of trauma or systemic diseases that may contribute to neuropathy.

Orthopedics

Documentation Requirements

Surgical notes and imaging studies that may indicate nerve compression.

Common Clinical Scenarios

Patients with symptoms of nerve entrapment following orthopedic injuries.

Billing Considerations

Document any surgical interventions or conservative management strategies employed.

Coding Guidelines

Inclusion Criteria

Use G57.90 When
  • According to ICD
  • 10 coding guidelines, G57
  • 90 should be used when the specific nerve affected is not documented
  • Coders should ensure that all relevant clinical information is captured to support the diagnosis
  • It is important to follow the guidelines for specificity and to avoid unspecified codes when more specific codes are available

Exclusion Criteria

Do NOT use G57.90 When
No specific exclusions found.

Related ICD-10 Codes

Related CPT Codes

95903CPT Code

Nerve conduction study, each nerve; motor, sensory, or mixed

Clinical Scenario

Used to evaluate the function of the affected nerve in patients with symptoms of mononeuropathy.

Documentation Requirements

Document the specific nerves tested and the results of the study.

Specialty Considerations

Neurologists should ensure that the clinical rationale for the study is clearly documented.

ICD-10 Impact

Diagnostic & Documentation Impact

Enhanced Specificity

ICD-10 Improvements

The transition to ICD-10 has allowed for greater specificity in coding, but the use of unspecified codes like G57.90 can lead to challenges in reimbursement and quality reporting. Coders must ensure that they are using the most accurate codes available to reflect the patient's condition.

ICD-9 vs ICD-10

The transition to ICD-10 has allowed for greater specificity in coding, but the use of unspecified codes like G57.90 can lead to challenges in reimbursement and quality reporting. Coders must ensure that they are using the most accurate codes available to reflect the patient's condition.

Reimbursement & Billing Impact

reimbursement and quality reporting. Coders must ensure that they are using the most accurate codes available to reflect the patient's condition.

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 G57.90?

To support the use of G57.90, document the patient's symptoms, clinical findings, any relevant history of trauma or systemic disease, and the results of nerve conduction studies if performed. Ensure that the documentation clearly reflects the complexity of the patient's condition.