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ICD-10 Guide
ICD-10 CodesM61.479

M61.479

Billable

Other calcification of muscle, unspecified ankle and foot

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

Code Description

ICD-10 M61.479 is a billable code used to indicate a diagnosis of other calcification of muscle, unspecified ankle and foot.

Key Diagnostic Point:

M61.479 refers to the condition characterized by abnormal calcification of muscle tissue in the ankle and foot regions, which is not classified under other specific categories. This condition can arise from various underlying causes, including metabolic disorders, trauma, or chronic inflammation. Calcification may lead to muscle stiffness, pain, and functional impairment, impacting mobility and quality of life. Patients may present with symptoms such as localized swelling, tenderness, and reduced range of motion. The diagnosis typically involves imaging studies, such as X-rays or MRI, to visualize the calcified areas and assess the extent of muscle involvement. Treatment options may include physical therapy, pain management, and in some cases, surgical intervention to remove the calcified tissue. Understanding the etiology and clinical implications of muscle calcification is crucial for effective management and rehabilitation.

Code Complexity Analysis

Complexity Rating: Medium

Medium Complexity

Complexity Factors

  • Variability in presentation and symptoms among patients
  • Need for comprehensive imaging studies for accurate diagnosis
  • Differentiation from other muscle disorders and calcification types
  • Potential for co-existing conditions affecting treatment

Audit Risk Factors

  • Insufficient documentation of the underlying cause of calcification
  • Lack of imaging studies to support diagnosis
  • Inconsistent coding of related muscle disorders
  • Failure to document the impact on function and mobility

Specialty Focus

Medical Specialties

Orthopedics

Documentation Requirements

Detailed imaging reports, treatment plans, and follow-up notes.

Common Clinical Scenarios

Patients presenting with pain and stiffness in the ankle and foot, often after trauma or chronic overuse.

Billing Considerations

Orthopedic specialists should ensure that all relevant imaging and treatment details are documented to support the diagnosis.

Rheumatology

Documentation Requirements

Comprehensive history of symptoms, laboratory results, and treatment responses.

Common Clinical Scenarios

Patients with systemic conditions leading to muscle calcification, such as myositis or metabolic disorders.

Billing Considerations

Rheumatologists must document any systemic involvement and the patient's overall health status.

Coding Guidelines

Inclusion Criteria

Use M61.479 When
  • According to ICD
  • 10 coding guidelines, M61
  • 479 should be used when the calcification of muscle is confirmed but does not fit into more specific categories
  • Coders must ensure that the documentation supports the diagnosis and that any underlying conditions are also coded appropriately

Exclusion Criteria

Do NOT use M61.479 When
No specific exclusions found.

Related ICD-10 Codes

Related CPT Codes

73030CPT Code

Radiologic examination, ankle

Clinical Scenario

Used when imaging is required to assess calcification in the ankle.

Documentation Requirements

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

Specialty Considerations

Orthopedic specialists should ensure imaging is relevant to the diagnosis.

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. M61.479 provides a clear designation for cases that do not fit into more specific categories, aiding in data collection and analysis.

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. M61.479 provides a clear designation for cases that do not fit into more specific categories, aiding in data collection and analysis.

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. M61.479 provides a clear designation for cases that do not fit into more specific categories, aiding in data collection and analysis.

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, chronic inflammation, and certain systemic diseases. Each case may require a different approach to diagnosis and treatment.