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ICD-10 Guide
ICD-10 CodesM61.451

M61.451

Billable

Other calcification of muscle, right thigh

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

Code Description

ICD-10 M61.451 is a billable code used to indicate a diagnosis of other calcification of muscle, right thigh.

Key Diagnostic Point:

Calcification of muscle tissue, particularly in the right thigh, can occur due to various underlying conditions, including myositis, trauma, or metabolic disorders. This condition is characterized by the deposition of calcium salts in muscle fibers, leading to stiffness, pain, and potential muscle weakness. In cases of myositis, inflammation of the muscle tissue may precede calcification, resulting in symptoms such as swelling, tenderness, and reduced muscle function. The calcification can be a result of dystrophic calcification, which occurs in damaged or necrotic tissue, or metastatic calcification, which is associated with systemic conditions like hyperparathyroidism. Clinically, patients may present with localized pain, decreased range of motion, and muscle weakness, impacting their daily activities. Diagnosis typically involves imaging studies, such as X-rays or MRI, to visualize the calcified areas, alongside laboratory tests to rule out metabolic causes. Treatment may include physical therapy, pain management, and addressing any underlying conditions contributing to the calcification.

Code Complexity Analysis

Complexity Rating: Medium

Medium Complexity

Complexity Factors

  • Differentiating between types of muscle calcification
  • Understanding the underlying causes of calcification
  • Need for precise documentation of muscle location and condition
  • Potential overlap with other muscle disorders

Audit Risk Factors

  • Inadequate documentation of the clinical rationale for the diagnosis
  • Failure to specify the exact location of calcification
  • Misclassification of calcification type
  • Lack of supporting imaging or lab results

Specialty Focus

Medical Specialties

Rheumatology

Documentation Requirements

Detailed history of muscle symptoms, imaging results, and lab tests.

Common Clinical Scenarios

Patients presenting with muscle pain and weakness, suspected myositis.

Billing Considerations

Consideration of autoimmune conditions that may lead to muscle calcification.

Orthopedics

Documentation Requirements

Documentation of physical examination findings, imaging studies, and treatment plans.

Common Clinical Scenarios

Patients with trauma history presenting with muscle calcification.

Billing Considerations

Assessment of functional impairment and potential surgical interventions.

Coding Guidelines

Inclusion Criteria

Use M61.451 When
  • Follow official ICD
  • 10 coding guidelines, ensuring accurate documentation of the condition's specifics, including the muscle involved and any associated symptoms
  • Ensure that the diagnosis is supported by clinical findings and imaging results

Exclusion Criteria

Do NOT use M61.451 When
No specific exclusions found.

Related ICD-10 Codes

Related CPT Codes

73030CPT Code

Radiologic examination, thigh

Clinical Scenario

Used when imaging is performed to assess calcification in the thigh muscle.

Documentation Requirements

Include imaging results and clinical rationale for the examination.

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 data collection and reimbursement processes. This specificity aids in better understanding the prevalence and management of muscle disorders.

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. This specificity aids in better understanding the prevalence and management of muscle disorders.

Reimbursement & Billing Impact

reimbursement processes. This specificity aids in better understanding the prevalence and management of muscle disorders.

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, myositis, metabolic disorders, and certain systemic diseases. Each cause may present with different clinical features and require specific diagnostic approaches.