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ICD-10 Guide
ICD-10 CodesM61.46

M61.46

Billable

Other calcification of muscle, lower leg

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

Code Description

ICD-10 M61.46 is a billable code used to indicate a diagnosis of other calcification of muscle, lower leg.

Key Diagnostic Point:

M61.46 refers to the condition characterized by abnormal calcification of muscle tissue in the lower leg, which can occur due to various underlying factors such as trauma, metabolic disorders, or inflammatory conditions. This calcification can lead to muscle stiffness, pain, and functional impairment. Patients may present with symptoms such as localized swelling, tenderness, and reduced range of motion in the affected area. The condition can be associated with myositis, where inflammation of the muscle tissue occurs, leading to muscle weakness and discomfort. In some cases, calcification may be a result of dystrophic calcification, which occurs in damaged or necrotic tissue, or metastatic calcification due to systemic metabolic disturbances. Accurate diagnosis often requires imaging studies, such as X-rays or MRI, to visualize the calcified areas and differentiate them from other muscle disorders. Treatment may involve physical therapy, pain management, and addressing any underlying conditions contributing to the calcification.

Code Complexity Analysis

Complexity Rating: Medium

Medium Complexity

Complexity Factors

  • Variety of underlying causes leading to calcification
  • Need for precise documentation of symptoms and imaging results
  • Differentiation from other muscle disorders
  • Potential for co-existing conditions affecting coding

Audit Risk Factors

  • Inadequate documentation of symptoms and imaging findings
  • Failure to specify the underlying cause of calcification
  • Misclassification with other muscle disorders
  • Lack of clarity in treatment plans

Specialty Focus

Medical Specialties

Rheumatology

Documentation Requirements

Detailed history of symptoms, physical examination findings, and imaging results.

Common Clinical Scenarios

Patients presenting with muscle pain and stiffness, particularly after trauma or in the context of autoimmune diseases.

Billing Considerations

Consideration of systemic conditions that may contribute to calcification, such as hyperparathyroidism.

Orthopedics

Documentation Requirements

Surgical notes, imaging studies, and post-operative assessments.

Common Clinical Scenarios

Patients with calcification following orthopedic trauma or surgery.

Billing Considerations

Documentation of the impact of calcification on mobility and function.

Coding Guidelines

Inclusion Criteria

Use M61.46 When
  • Follow official ICD
  • 10 coding guidelines, ensuring accurate documentation of the condition's etiology and associated symptoms
  • Include any relevant imaging studies and treatment plans in the patient's medical record

Exclusion Criteria

Do NOT use M61.46 When
No specific exclusions found.

Related ICD-10 Codes

Related CPT Codes

73030CPT Code

Radiologic examination, lower leg

Clinical Scenario

Used when imaging is required to assess calcification.

Documentation Requirements

Include imaging reports and clinical findings.

Specialty Considerations

Ensure alignment with orthopedic or rheumatologic evaluations.

ICD-10 Impact

Diagnostic & Documentation Impact

Enhanced Specificity

ICD-10 Improvements

The transition to ICD-10 has allowed for more specific coding of muscle calcification, improving the accuracy of data collection and reimbursement processes.

ICD-9 vs ICD-10

The transition to ICD-10 has allowed for more specific coding of muscle calcification, improving the accuracy of data collection 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 are the common causes of calcification in the lower leg muscles?

Common causes include trauma, metabolic disorders, and inflammatory conditions. Each case should be evaluated for underlying factors contributing to calcification.