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ICD-10 Guide
ICD-10 CodesM21.24

M21.24

Billable

Flexion deformity, finger joints

BILLABLE STATUSYes
IMPLEMENTATION DATEOctober 1, 2015
LAST UPDATED09/17/2025

Code Description

ICD-10 M21.24 is a billable code used to indicate a diagnosis of flexion deformity, finger joints.

Key Diagnostic Point:

Flexion deformity of the finger joints is characterized by an abnormal bending of the fingers at the joints, leading to a reduced range of motion and functional impairment. This condition can be acquired due to various factors, including trauma, arthritis, or neurological conditions. Acquired flexion deformities often result from conditions such as Dupuytren's contracture, where fibrous tissue thickens and shortens, pulling the fingers into a flexed position. Other causes may include rheumatoid arthritis, which can lead to joint damage and deformity over time. The impact of these deformities can significantly affect a patient's ability to perform daily activities, necessitating corrective procedures such as tendon release or joint fusion. In some cases, surgical intervention may be required to restore function and alleviate pain. Understanding the underlying cause of the flexion deformity is crucial for determining the appropriate treatment and coding.

Code Complexity Analysis

Complexity Rating: Medium

Medium Complexity

Complexity Factors

  • Variety of underlying causes (e.g., trauma, arthritis)
  • Need for detailed documentation of the deformity's severity
  • Potential for multiple co-existing conditions
  • Variability in treatment options and procedures

Audit Risk Factors

  • Inadequate documentation of the deformity's cause
  • Failure to specify the affected finger joints
  • Incorrect coding of associated conditions
  • Lack of clarity in treatment plans

Specialty Focus

Medical Specialties

Orthopedic Surgery

Documentation Requirements

Detailed descriptions of the deformity, imaging studies, and treatment plans.

Common Clinical Scenarios

Patients presenting with post-traumatic flexion deformities or degenerative joint disease.

Billing Considerations

Ensure accurate documentation of the specific joints involved and any previous treatments.

Rheumatology

Documentation Requirements

Comprehensive history of joint symptoms, laboratory results, and treatment responses.

Common Clinical Scenarios

Patients with rheumatoid arthritis exhibiting finger joint deformities.

Billing Considerations

Document the progression of the disease and its impact on joint function.

Coding Guidelines

Inclusion Criteria

Use M21.24 When
  • According to ICD
  • 10 guidelines, M21
  • 24 should be used when the flexion deformity is specifically documented and is not a congenital condition
  • It is important to include details about the affected joints and any associated conditions

Exclusion Criteria

Do NOT use M21.24 When
No specific exclusions found.

Related ICD-10 Codes

Related CPT Codes

26145CPT Code

Tendon release, finger

Clinical Scenario

Used when surgical intervention is required for a flexion deformity.

Documentation Requirements

Document the specific tendons involved and the extent of the procedure.

Specialty Considerations

Orthopedic surgeons should provide detailed operative notes.

ICD-10 Impact

Diagnostic & Documentation Impact

Enhanced Specificity

ICD-10 Improvements

The transition to ICD-10 has allowed for more specific coding of conditions like flexion deformities, improving the accuracy of patient records and facilitating better treatment planning.

ICD-9 vs ICD-10

The transition to ICD-10 has allowed for more specific coding of conditions like flexion deformities, improving the accuracy of patient records and facilitating better treatment planning.

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 documentation is required for M21.24?

Documentation must include the specific joints affected, the severity of the deformity, and any associated conditions or treatments.