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ICD-10 Guide
ICD-10 CodesM24.662

M24.662

Billable

Ankylosis, left knee

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

Code Description

ICD-10 M24.662 is a billable code used to indicate a diagnosis of ankylosis, left knee.

Key Diagnostic Point:

Ankylosis of the left knee refers to the abnormal stiffening and immobility of the knee joint due to fusion of the bones. This condition can arise from various causes, including trauma, inflammatory arthritis, or degenerative joint diseases. Patients with ankylosis often experience significant pain and functional limitations, as the knee joint is crucial for mobility and weight-bearing activities. The condition can lead to compensatory changes in gait and posture, potentially resulting in secondary musculoskeletal issues. Diagnosis typically involves a thorough clinical examination, imaging studies such as X-rays or MRI, and assessment of joint function. Treatment options may include physical therapy, pain management, and in severe cases, surgical intervention to restore mobility. Understanding the underlying causes, such as internal derangements, meniscal tears, or ligament injuries, is essential for effective management and coding.

Code Complexity Analysis

Complexity Rating: Medium

Medium Complexity

Complexity Factors

  • Differentiating between ankylosis and other joint conditions.
  • Understanding the underlying causes of ankylosis.
  • Documenting the severity and functional limitations associated with the condition.
  • Identifying co-existing conditions that may affect treatment and coding.

Audit Risk Factors

  • Inadequate documentation of the cause of ankylosis.
  • Failure to document functional limitations.
  • Misclassification of the type of ankylosis.
  • Inconsistent coding of related procedures.

Specialty Focus

Medical Specialties

Orthopedic Surgery

Documentation Requirements

Detailed surgical notes, imaging results, and pre-operative assessments.

Common Clinical Scenarios

Patients undergoing knee arthroscopy for meniscal tears or ligament reconstruction.

Billing Considerations

Ensure accurate coding of any concurrent procedures performed during surgery.

Physical Medicine and Rehabilitation

Documentation Requirements

Comprehensive evaluations of functional status and treatment plans.

Common Clinical Scenarios

Patients receiving rehabilitation post-surgery or for conservative management of ankylosis.

Billing Considerations

Documenting progress and response to therapy is crucial for coding and billing.

Coding Guidelines

Inclusion Criteria

Use M24.662 When
  • Follow official ICD
  • 10 coding guidelines, ensuring accurate documentation of the diagnosis, treatment plan, and any related conditions
  • Include specific details about the patient's history and functional limitations

Exclusion Criteria

Do NOT use M24.662 When
No specific exclusions found.

Related ICD-10 Codes

Related CPT Codes

29880CPT Code

Arthroscopy, knee, diagnostic, with or without synovial biopsy

Clinical Scenario

Used for diagnostic evaluation of knee conditions, including ankylosis.

Documentation Requirements

Document indications for the procedure and findings.

Specialty Considerations

Orthopedic surgeons must ensure accurate coding of findings and any additional procedures performed.

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 ankylosis, improving the accuracy of patient records and reimbursement processes.

ICD-9 vs ICD-10

The transition to ICD-10 has allowed for more specific coding of conditions like ankylosis, improving the accuracy of patient records and reimbursement processes.

Reimbursement & Billing Impact

reimbursement processes.

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 primary cause of ankylosis in the knee?

Ankylosis in the knee can result from various factors, including trauma, inflammatory arthritis, or degenerative joint diseases. Identifying the underlying cause is crucial for effective treatment and coding.