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ICD-10 Guide
ICD-10 CodesM61.29

M61.29

Billable

Paralytic calcification and ossification of muscle, multiple sites

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

Code Description

ICD-10 M61.29 is a billable code used to indicate a diagnosis of paralytic calcification and ossification of muscle, multiple sites.

Key Diagnostic Point:

Paralytic calcification and ossification of muscle, classified under ICD-10 code M61.29, refers to the pathological process where calcium deposits and bone-like structures form in muscle tissue due to prolonged immobilization or denervation. This condition is often seen in patients with neuromuscular disorders, such as myositis, where inflammation leads to muscle weakness and subsequent disuse. The calcification can occur in multiple muscle groups, particularly in the context of paralysis or severe muscle atrophy. Clinically, patients may present with stiffness, pain, and reduced range of motion in affected muscles. Diagnosis typically involves imaging studies, such as X-rays or MRI, which reveal calcified areas within the muscle. Treatment may include physical therapy, pain management, and in some cases, surgical intervention to remove calcified tissue. Understanding the underlying causes, such as myositis or other neuromuscular conditions, is crucial for effective management and coding.

Code Complexity Analysis

Complexity Rating: Medium

Medium Complexity

Complexity Factors

  • Requires understanding of muscle pathology and neuromuscular conditions.
  • Differentiation from other muscle disorders can be challenging.
  • Documentation must clearly indicate multiple sites of calcification.
  • Potential overlap with other ICD-10 codes related to muscle disorders.

Audit Risk Factors

  • Insufficient documentation of multiple sites.
  • Lack of imaging studies to support diagnosis.
  • Inconsistent clinical findings in the medical record.
  • Failure to link the condition to an underlying neuromuscular disorder.

Specialty Focus

Medical Specialties

Neurology

Documentation Requirements

Detailed neurological examination findings, imaging results, and treatment plans.

Common Clinical Scenarios

Patients with myositis presenting with muscle weakness and calcification.

Billing Considerations

Ensure clear documentation of neurological assessments and any related conditions.

Physical Medicine and Rehabilitation

Documentation Requirements

Functional assessments, treatment progress notes, and rehabilitation goals.

Common Clinical Scenarios

Rehabilitation of patients post-immobilization with muscle calcification.

Billing Considerations

Document the impact of calcification on functional abilities and rehabilitation outcomes.

Coding Guidelines

Inclusion Criteria

Use M61.29 When
  • According to ICD
  • 10 coding guidelines, M61
  • 29 should be used when there is clear documentation of paralytic calcification and ossification in multiple muscle sites
  • It is important to ensure that the condition is not a result of trauma or other acute injuries, which would require different coding

Exclusion Criteria

Do NOT use M61.29 When
No specific exclusions found.

Related ICD-10 Codes

Related CPT Codes

73030CPT Code

Radiologic examination, muscle, including report

Clinical Scenario

Used when imaging is performed to assess calcification in muscles.

Documentation Requirements

Radiology report must clearly indicate the presence of calcification.

Specialty Considerations

Ensure that the imaging findings correlate with the clinical 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 disorders, including M61.29, which provides better granularity in capturing the complexities of muscle calcification and ossification. This specificity aids in improved patient management and research outcomes.

ICD-9 vs ICD-10

The transition to ICD-10 has allowed for more specific coding of muscle disorders, including M61.29, which provides better granularity in capturing the complexities of muscle calcification and ossification. This specificity aids in improved patient management and research outcomes.

Reimbursement & Billing Impact

reimbursement.

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 paralytic calcification?

Common causes include prolonged immobilization, denervation due to neurological conditions, and inflammatory myopathies such as myositis.