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ICD-10 Guide
ICD-10 CodesG57.92

G57.92

Billable

Unspecified mononeuropathy of left lower limb

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

Code Description

ICD-10 G57.92 is a billable code used to indicate a diagnosis of unspecified mononeuropathy of left lower limb.

Key Diagnostic Point:

Unspecified mononeuropathy of the left lower limb refers to a condition characterized by damage or dysfunction of a single peripheral nerve in the left leg, leading to symptoms such as pain, weakness, numbness, or tingling. This condition can arise from various causes, including trauma, compression, or systemic diseases such as diabetes. The term 'unspecified' indicates that the exact nerve affected is not documented, which can complicate diagnosis and treatment. Common types of mononeuropathy affecting the lower limb include peroneal nerve palsy and tibial nerve entrapment. Diagnosis typically involves a thorough clinical examination, patient history, and may include nerve conduction studies (NCS) to assess the electrical activity of the affected nerve. Treatment options vary based on the underlying cause and may include physical therapy, medications for pain relief, or surgical intervention in cases of severe compression. Accurate coding is essential for proper reimbursement and to reflect the patient's condition in medical records.

Code Complexity Analysis

Complexity Rating: Medium

Medium Complexity

Complexity Factors

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

Audit Risk Factors

  • Insufficient documentation of symptoms
  • Failure to specify the affected nerve
  • Inconsistent coding with clinical findings
  • Lack of supporting diagnostic tests

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 that nerve conduction studies and imaging results are included in the documentation.

Physical Medicine and Rehabilitation

Documentation Requirements

Functional assessments and treatment plans addressing mobility and pain management.

Common Clinical Scenarios

Patients undergoing rehabilitation for nerve injuries or post-surgical recovery.

Billing Considerations

Document progress notes and response to therapy to support ongoing treatment.

Coding Guidelines

Inclusion Criteria

Use G57.92 When
  • According to ICD
  • 10 coding guidelines, G57
  • 92 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

Exclusion Criteria

Do NOT use G57.92 When
  • Exclusion criteria include conditions that are better classified under other neuropathy codes

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 rationale for the study.

Specialty Considerations

Neurologists should ensure that the clinical indications for the study are clearly documented.

ICD-10 Impact

Diagnostic & Documentation Impact

Enhanced Specificity

ICD-10 Improvements

The transition to ICD-10 has allowed for more specific coding of neuropathies, but the use of unspecified codes like G57.92 can lead to challenges in reimbursement and care management. Coders must ensure that they capture as much detail as possible to avoid potential denials.

ICD-9 vs ICD-10

The transition to ICD-10 has allowed for more specific coding of neuropathies, but the use of unspecified codes like G57.92 can lead to challenges in reimbursement and care management. Coders must ensure that they capture as much detail as possible to avoid potential denials.

Reimbursement & Billing Impact

reimbursement and care management. Coders must ensure that they capture as much detail as possible to avoid potential denials.

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 G57.92?

Document the patient's symptoms, clinical findings, any diagnostic tests performed, and the rationale for the diagnosis. Ensure that the affected limb is specified and that any underlying conditions are noted.