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ICD-10 Guide
ICD-10 CodesM61.00

M61.00

Billable

Myositis ossificans traumatica, unspecified site

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

Code Description

ICD-10 M61.00 is a billable code used to indicate a diagnosis of myositis ossificans traumatica, unspecified site.

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 arises after a significant injury, such as a fracture or severe contusion, leading to inflammation and subsequent calcification of the affected muscle. The ossification process can result in pain, swelling, and restricted movement in the affected area. Patients may experience muscle weakness due to the loss of normal muscle function and the presence of ectopic bone. Diagnosis is often confirmed through imaging studies, such as X-rays or MRI, which reveal the presence of calcified masses within the muscle. Treatment may involve physical therapy, pain management, and in some cases, surgical intervention to remove the ossified tissue. The unspecified site designation indicates that the specific location of the myositis ossificans has not been documented, which can complicate treatment and management strategies.

Code Complexity Analysis

Complexity Rating: Medium

Medium Complexity

Complexity Factors

  • Variability in clinical presentation and symptoms
  • Need for precise documentation of trauma history
  • Differentiation from other muscle disorders
  • Potential for multiple sites of ossification

Audit Risk Factors

  • Inadequate documentation of trauma history
  • Failure to specify the site of ossification
  • Lack of imaging results in the medical record
  • Misinterpretation of symptoms as other muscle disorders

Specialty Focus

Medical Specialties

Orthopedics

Documentation Requirements

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

Common Clinical Scenarios

Post-traumatic cases following sports injuries or accidents.

Billing Considerations

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

Physical Medicine and Rehabilitation

Documentation Requirements

Functional assessments, treatment progress notes, and rehabilitation plans.

Common Clinical Scenarios

Patients undergoing rehabilitation after trauma with muscle weakness.

Billing Considerations

Document the impact of myositis ossificans on functional abilities and rehabilitation goals.

Coding Guidelines

Inclusion Criteria

Use M61.00 When
  • Follow the official ICD
  • CM coding guidelines, ensuring accurate documentation of the trauma history and clinical findings
  • Include imaging results to support the diagnosis and specify the site if known

Exclusion Criteria

Do NOT use M61.00 When
No specific exclusions found.

Related ICD-10 Codes

Related CPT Codes

20610CPT Code

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

Clinical Scenario

Used when joint aspiration is needed due to swelling from myositis ossificans.

Documentation Requirements

Document the indication for aspiration and findings.

Specialty Considerations

Orthopedic specialists may frequently 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. The ability to specify the site of ossification enhances clinical understanding and treatment planning.

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. The ability to specify the site of ossification enhances clinical understanding and treatment planning.

Reimbursement & Billing Impact

reimbursement processes. The ability to specify the site of ossification enhances clinical understanding and treatment planning.

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 following trauma, leading to pain and restricted movement.

How is myositis ossificans diagnosed?

Diagnosis is typically made through imaging studies such as X-rays or MRI, which reveal calcified masses within the muscle.

What are the treatment options for myositis ossificans?

Treatment may include physical therapy, pain management, and in some cases, surgical removal of the ossified tissue.