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ICD-10 Guide
ICD-10 CodesM61.49

M61.49

Billable

Other calcification of muscle, multiple sites

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

Code Description

ICD-10 M61.49 is a billable code used to indicate a diagnosis of other calcification of muscle, multiple sites.

Key Diagnostic Point:

M61.49 refers to the condition characterized by abnormal calcification in muscle tissue at multiple sites. This condition can arise from various underlying causes, including metabolic disorders, trauma, or inflammatory processes. Calcification in muscles can lead to stiffness, pain, and functional impairment, significantly affecting a patient's mobility and quality of life. It may be associated with myositis, a condition where muscle inflammation occurs, leading to muscle weakness and discomfort. The calcification can be detected through imaging studies such as X-rays or MRI, which reveal the presence of calcium deposits in the muscle tissue. Clinicians must consider the patient's history, symptoms, and any underlying conditions when diagnosing and managing this condition. Treatment may involve addressing the underlying cause, physical therapy, and pain management strategies. Accurate coding is essential for proper reimbursement and to ensure that the patient's condition is appropriately documented in their medical record.

Code Complexity Analysis

Complexity Rating: Medium

Medium Complexity

Complexity Factors

  • Variety of underlying causes leading to calcification
  • Differentiation from other muscle disorders
  • Need for comprehensive documentation of symptoms and history
  • Potential overlap with other ICD-10 codes related to muscle conditions

Audit Risk Factors

  • Inadequate documentation of the number of sites affected
  • Failure to specify the underlying cause of calcification
  • Misuse of related codes that may not accurately reflect the condition
  • Lack of imaging studies to support the diagnosis

Specialty Focus

Medical Specialties

Rheumatology

Documentation Requirements

Detailed patient history, physical examination findings, imaging results, and treatment plans.

Common Clinical Scenarios

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

Billing Considerations

Consideration of comorbid conditions that may contribute to calcification, such as hyperparathyroidism or renal disease.

Neurology

Documentation Requirements

Neurological examination findings, electromyography (EMG) results, and any relevant imaging studies.

Common Clinical Scenarios

Patients with unexplained muscle weakness or atrophy, requiring differentiation from neuromuscular disorders.

Billing Considerations

Assessment of potential neuromuscular junction disorders that may mimic symptoms of muscle calcification.

Coding Guidelines

Inclusion Criteria

Use M61.49 When
  • According to ICD
  • 10 coding guidelines, M61
  • 49 should be used when there is clear documentation of calcification in multiple muscle sites
  • It is essential to include the underlying cause if known, and to ensure that the documentation supports the diagnosis through clinical findings and imaging

Exclusion Criteria

Do NOT use M61.49 When
No specific exclusions found.

Related ICD-10 Codes

Related CPT Codes

73030CPT Code

Radiologic examination, muscle

Clinical Scenario

Used when imaging is performed to assess for calcification in muscle tissue.

Documentation Requirements

Radiology report detailing findings of calcification.

Specialty Considerations

Ensure that the imaging study is relevant to the patient's symptoms and history.

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 ability to capture the complexity of the condition and its underlying causes.

ICD-9 vs ICD-10

The transition to ICD-10 has allowed for more specific coding of muscle calcification, improving the ability to capture the complexity of the condition and its underlying causes.

Reimbursement & Billing Impact

The transition to ICD-10 has allowed for more specific coding of muscle calcification, improving the ability to capture the complexity of the condition and its underlying causes.

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 muscle calcification?

Common causes include metabolic disorders, trauma, inflammatory conditions, and certain medications that may lead to abnormal calcium deposition in muscle tissue.