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ICD-10 Guide
ICD-10 CodesM61.40

M61.40

Billable

Other calcification of muscle, unspecified site

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

Code Description

ICD-10 M61.40 is a billable code used to indicate a diagnosis of other calcification of muscle, unspecified site.

Key Diagnostic Point:

M61.40 refers to the condition characterized by abnormal calcification in muscle tissue, which can occur due to various underlying causes. This condition may be associated with myositis, a group of inflammatory muscle disorders that can lead to muscle weakness and damage. Calcification can result from chronic inflammation, trauma, or metabolic disorders, leading to the deposition of calcium salts in muscle fibers. Patients may present with symptoms such as localized pain, stiffness, and reduced muscle function. The calcification can be detected through imaging studies, such as X-rays or MRI, which reveal the presence of calcified areas within the muscle. Treatment typically focuses on addressing the underlying cause, managing symptoms, and may include physical therapy to improve muscle strength and function. 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.
  • Potential overlap with other muscle disorders.
  • Need for precise documentation of symptoms and imaging findings.
  • Variability in clinical presentation among patients.

Audit Risk Factors

  • Insufficient documentation of the underlying cause of calcification.
  • Lack of imaging reports to support the diagnosis.
  • Inconsistent use of terminology in clinical notes.
  • Failure to document associated symptoms or functional limitations.

Specialty Focus

Medical Specialties

Rheumatology

Documentation Requirements

Detailed clinical history, physical examination findings, and imaging results.

Common Clinical Scenarios

Patients presenting with unexplained muscle pain and weakness, requiring differential diagnosis.

Billing Considerations

Consideration of autoimmune conditions that may contribute to muscle calcification.

Orthopedics

Documentation Requirements

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

Common Clinical Scenarios

Patients with calcification following trauma or surgical intervention.

Billing Considerations

Documentation of the mechanism of injury and subsequent treatment plans.

Coding Guidelines

Inclusion Criteria

Use M61.40 When
  • According to ICD
  • 10 coding guidelines, M61
  • 40 should be used when the specific site of calcification is not documented
  • Coders should ensure that the documentation supports the diagnosis and that the condition is not attributable to other specified causes

Exclusion Criteria

Do NOT use M61.40 When
No specific exclusions found.

Related ICD-10 Codes

Related CPT Codes

73030CPT Code

Radiologic examination, muscle, including calcification.

Clinical Scenario

When imaging is performed to evaluate muscle calcification.

Documentation Requirements

Imaging reports must be included in the patient's medical record.

Specialty Considerations

Orthopedic specialists may frequently order these imaging studies.

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 diagnoses and treatment plans. M61.40 provides a broader category for unspecified calcification, which can help capture cases that may not fit neatly into more specific codes.

ICD-9 vs ICD-10

The transition to ICD-10 has allowed for more specific coding of muscle calcification, improving the accuracy of diagnoses and treatment plans. M61.40 provides a broader category for unspecified calcification, which can help capture cases that may not fit neatly into more specific codes.

Reimbursement & Billing Impact

The transition to ICD-10 has allowed for more specific coding of muscle calcification, improving the accuracy of diagnoses and treatment plans. M61.40 provides a broader category for unspecified calcification, which can help capture cases that may not fit neatly into more specific codes.

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 trauma, inflammatory conditions like myositis, metabolic disorders, and chronic kidney disease. Each cause may present differently and require specific diagnostic approaches.