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ICD-10 Guide
ICD-10 CodesM61.35

M61.35

Billable

Calcification and ossification of muscles associated with burns, thigh

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

Code Description

ICD-10 M61.35 is a billable code used to indicate a diagnosis of calcification and ossification of muscles associated with burns, thigh.

Key Diagnostic Point:

Calcification and ossification of muscles associated with burns, particularly in the thigh region, is a condition that arises following severe thermal injuries. This pathological process involves the deposition of calcium salts in muscle tissue, leading to stiffness, pain, and impaired mobility. The condition is often a sequela of burns, where the muscle tissue undergoes necrosis and subsequent healing processes can lead to abnormal mineralization. Patients may experience muscle weakness and reduced range of motion due to the calcified areas, which can complicate rehabilitation efforts. The thigh, being a major muscle group, is particularly affected, impacting ambulation and overall quality of life. Diagnosis typically involves imaging studies, such as X-rays or MRI, to visualize the calcifications, alongside clinical evaluation of muscle function and strength. Treatment may include physical therapy, pain management, and in some cases, surgical intervention to remove calcified tissue if it severely limits function.

Code Complexity Analysis

Complexity Rating: Medium

Medium Complexity

Complexity Factors

  • Requires understanding of burn-related complications
  • Differentiation from other muscle disorders
  • Need for precise documentation of burn severity
  • Potential for co-morbid conditions affecting coding

Audit Risk Factors

  • Inadequate documentation of burn severity
  • Failure to specify the affected muscle group
  • Misclassification of calcification as a primary diagnosis
  • Lack of supporting imaging studies

Specialty Focus

Medical Specialties

Physical Medicine and Rehabilitation

Documentation Requirements

Detailed assessment of muscle strength, range of motion, and functional limitations.

Common Clinical Scenarios

Patients recovering from severe burns with muscle stiffness and weakness.

Billing Considerations

Documentation should include specific therapies employed and progress notes.

Orthopedic Surgery

Documentation Requirements

Surgical notes detailing the procedure for excision of calcified tissue if performed.

Common Clinical Scenarios

Surgical intervention for severe calcification affecting mobility.

Billing Considerations

Clear indication of the need for surgery based on functional impairment.

Coding Guidelines

Inclusion Criteria

Use M61.35 When
  • According to ICD
  • 10 guidelines, M61
  • 35 should be used when there is clear documentation of calcification and ossification of muscles specifically associated with burns
  • It is important to ensure that the burn is documented as the underlying cause of the muscle condition

Exclusion Criteria

Do NOT use M61.35 When
  • Exclusion criteria include muscle calcification due to other etiologies

Related ICD-10 Codes

Related CPT Codes

97110CPT Code

Therapeutic exercises

Clinical Scenario

Used in conjunction with M61.35 for rehabilitation of affected muscles.

Documentation Requirements

Documentation of exercises performed and patient progress.

Specialty Considerations

Physical therapy notes should detail the specific exercises targeting muscle strength.

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 M61.35, improving the accuracy of data collection and reimbursement processes. It emphasizes the need for detailed documentation of the relationship between burns and muscle calcification.

ICD-9 vs ICD-10

The transition to ICD-10 has allowed for more specific coding of conditions like M61.35, improving the accuracy of data collection and reimbursement processes. It emphasizes the need for detailed documentation of the relationship between burns and muscle calcification.

Reimbursement & Billing Impact

reimbursement processes. It emphasizes the need for detailed documentation of the relationship between burns and muscle calcification.

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 calcification in muscles associated with burns?

The primary cause is the body's healing response to severe thermal injuries, leading to necrosis and subsequent mineralization of muscle tissue.