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ICD-10 Guide
ICD-10 CodesM61.05

M61.05

Billable

Myositis ossificans traumatica, thigh

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

Code Description

ICD-10 M61.05 is a billable code used to indicate a diagnosis of myositis ossificans traumatica, thigh.

Key Diagnostic Point:

Myositis ossificans traumatica is a condition characterized by the abnormal formation of bone tissue within muscle or connective tissue following trauma. This condition typically occurs in the thigh muscles after an injury, such as a fracture, contusion, or surgical intervention. The pathophysiology involves the transformation of muscle fibers into bone-forming cells, leading to ossification. Patients may present with localized swelling, pain, and reduced range of motion in the affected thigh. Diagnosis is often confirmed through imaging studies, such as X-rays or MRI, which reveal calcification or ossification in the muscle tissue. Treatment may include physical therapy, pain management, and in some cases, surgical intervention to remove the ossified tissue. Early recognition and management are crucial to prevent complications such as muscle weakness and impaired mobility.

Code Complexity Analysis

Complexity Rating: Medium

Medium Complexity

Complexity Factors

  • Requires understanding of specific muscle disorders and their coding nuances.
  • Differentiation from other types of myositis and ossification disorders.
  • Need for precise documentation of trauma history.
  • Potential for co-morbid conditions affecting muscle function.

Audit Risk Factors

  • Inadequate documentation of trauma history.
  • Failure to specify the location of ossification.
  • Misclassification of myositis types.
  • Lack of imaging reports to support diagnosis.

Specialty Focus

Medical Specialties

Orthopedics

Documentation Requirements

Detailed history of trauma, imaging results, and treatment plans.

Common Clinical Scenarios

Post-traumatic ossification following fractures or surgical procedures.

Billing Considerations

Ensure accurate documentation of the mechanism of injury and any surgical interventions.

Physical Medicine and Rehabilitation

Documentation Requirements

Functional assessments, treatment progress notes, and rehabilitation goals.

Common Clinical Scenarios

Rehabilitation following trauma leading to myositis ossificans.

Billing Considerations

Focus on documenting muscle strength assessments and functional limitations.

Coding Guidelines

Inclusion Criteria

Use M61.05 When
  • According to ICD
  • 10 guidelines, M61
  • 05 should be used when there is clear documentation of myositis ossificans due to trauma specifically in the thigh

Exclusion Criteria

Do NOT use M61.05 When
  • Exclusion criteria include myositis ossificans not related to trauma or occurring in other locations

Related ICD-10 Codes

Related CPT Codes

20610CPT Code

Arthrocentesis, aspiration and/or injection into a major joint or bursa

Clinical Scenario

Used when aspiration is needed for symptomatic relief.

Documentation Requirements

Document the reason for aspiration and any findings.

Specialty Considerations

Orthopedic specialists may perform this procedure.

ICD-10 Impact

Diagnostic & Documentation Impact

Enhanced Specificity

ICD-10 Improvements

The transition to ICD-10 has allowed for more specific coding of myositis ossificans, improving the accuracy of data collection and reimbursement processes. M61.05 provides a clear designation for trauma-related ossification, which was less defined in ICD-9.

ICD-9 vs ICD-10

The transition to ICD-10 has allowed for more specific coding of myositis ossificans, improving the accuracy of data collection and reimbursement processes. M61.05 provides a clear designation for trauma-related ossification, which was less defined in ICD-9.

Reimbursement & Billing Impact

reimbursement processes. M61.05 provides a clear designation for trauma-related ossification, which was less defined in ICD-9.

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 myositis ossificans traumatica?

Myositis ossificans traumatica is a condition where bone tissue forms in muscle or connective tissue due to trauma, often resulting in pain and limited mobility.

How is myositis ossificans diagnosed?

Diagnosis is typically made through clinical evaluation and imaging studies, such as X-rays or MRI, which reveal calcification or ossification in the affected muscle.

What are the treatment options for myositis ossificans?

Treatment may include physical therapy, pain management, and in some cases, surgical intervention to remove the ossified tissue.