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ICD-10 Guide
ICD-10 CodesG56.92

G56.92

Billable

Unspecified mononeuropathy of left upper limb

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

Code Description

ICD-10 G56.92 is a billable code used to indicate a diagnosis of unspecified mononeuropathy of left upper limb.

Key Diagnostic Point:

Unspecified mononeuropathy of the left upper limb refers to a condition characterized by damage or dysfunction of a single peripheral nerve in the left arm, leading to symptoms such as pain, weakness, numbness, or tingling. This condition can arise from various causes, including trauma, repetitive motion injuries, or systemic diseases. The term 'unspecified' indicates that the exact nerve affected is not documented, which can complicate diagnosis and treatment. Commonly affected nerves in the upper limb include the median, ulnar, and radial nerves, each of which can lead to distinct clinical presentations. Diagnosis typically involves a thorough clinical examination, patient history, and may include nerve conduction studies (NCS) to assess the electrical activity of the nerves. Treatment options vary based on the underlying cause and may include physical therapy, medications for pain relief, or surgical interventions in severe cases. 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
  • Potential overlap with other neuropathic conditions
  • Need for comprehensive documentation to support the diagnosis

Audit Risk Factors

  • Insufficient documentation of symptoms
  • Lack of clear diagnostic criteria
  • Inconsistent use of the unspecified code
  • Failure to document the clinical rationale for the diagnosis

Specialty Focus

Medical Specialties

Neurology

Documentation Requirements

Detailed neurological examination findings, including sensory and motor assessments.

Common Clinical Scenarios

Patients presenting with numbness or weakness in the left arm, often following trauma or repetitive strain.

Billing Considerations

Ensure that all relevant diagnostic tests, such as NCS, are documented to support the diagnosis.

Orthopedics

Documentation Requirements

Surgical notes, imaging studies, and physical examination findings.

Common Clinical Scenarios

Patients with left upper limb pain following an injury or surgery, potentially leading to nerve compression.

Billing Considerations

Document any surgical interventions or conservative management strategies employed.

Coding Guidelines

Inclusion Criteria

Use G56.92 When
  • Follow the ICD
  • CM coding guidelines for neurological conditions, ensuring that the documentation supports the diagnosis of mononeuropathy

Exclusion Criteria

Do NOT use G56.92 When
  • Exclude conditions that are more specific or related to systemic diseases

Related ICD-10 Codes

Related CPT Codes

95903CPT Code

Nerve conduction study, each nerve

Clinical Scenario

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

Documentation Requirements

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

Specialty Considerations

Neurologists should ensure that the 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 more specific coding of neuropathies, improving the accuracy of diagnoses and treatment plans. G56.92 provides a clear framework for documenting unspecified mononeuropathy, which can enhance patient care and billing accuracy.

ICD-9 vs ICD-10

The transition to ICD-10 has allowed for more specific coding of neuropathies, improving the accuracy of diagnoses and treatment plans. G56.92 provides a clear framework for documenting unspecified mononeuropathy, which can enhance patient care and billing accuracy.

Reimbursement & Billing Impact

billing accuracy.

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 is the difference between G56.92 and G56.90?

G56.92 specifies mononeuropathy of the left upper limb, while G56.90 is a more general code for unspecified mononeuropathy without specifying the site.