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ICD-10 Guide
ICD-10 CodesM61.259

M61.259

Billable

Paralytic calcification and ossification of muscle, unspecified thigh

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

Code Description

ICD-10 M61.259 is a billable code used to indicate a diagnosis of paralytic calcification and ossification of muscle, unspecified thigh.

Key Diagnostic Point:

Paralytic calcification and ossification of muscle refers to the pathological process where muscle tissue undergoes calcification and ossification due to paralysis. This condition typically arises from prolonged immobility or disuse of the affected muscle, leading to abnormal deposition of calcium salts and bone-like tissue within the muscle fibers. In the case of the unspecified thigh, the condition can affect either the anterior or posterior muscle groups, resulting in muscle stiffness, weakness, and potential functional impairment. Patients may experience pain and reduced range of motion, which can significantly impact mobility and quality of life. The condition is often associated with neuromuscular disorders, trauma, or prolonged bed rest, and may require a multidisciplinary approach for management, including physical therapy, pain management, and in some cases, surgical intervention to remove calcified tissue. Accurate diagnosis typically involves imaging studies such as X-rays or MRI to assess the extent of calcification and to rule out other underlying conditions.

Code Complexity Analysis

Complexity Rating: Medium

Medium Complexity

Complexity Factors

  • Variability in clinical presentation and severity of symptoms
  • Need for precise documentation of muscle affected and extent of calcification
  • Differentiation from other muscle disorders and conditions
  • Potential for co-existing neuromuscular conditions

Audit Risk Factors

  • Inadequate documentation of the clinical rationale for the diagnosis
  • Failure to specify the affected muscle group
  • Lack of imaging studies to support the diagnosis
  • Misclassification of the condition as a different muscle disorder

Specialty Focus

Medical Specialties

Orthopedics

Documentation Requirements

Detailed notes on physical examination findings, imaging results, and treatment plans.

Common Clinical Scenarios

Patients with prolonged immobilization due to fractures or surgeries leading to calcification.

Billing Considerations

Ensure to document the duration of immobility and any rehabilitation efforts.

Neurology

Documentation Requirements

Comprehensive neurological assessments and history of neuromuscular conditions.

Common Clinical Scenarios

Patients with neuromuscular disorders presenting with muscle weakness and calcification.

Billing Considerations

Document any underlying neuromuscular conditions that may contribute to the diagnosis.

Coding Guidelines

Inclusion Criteria

Use M61.259 When
  • Follow the official ICD
  • CM coding guidelines, ensuring to document the specific muscle affected and the clinical context
  • Include any relevant imaging studies and treatment plans in the medical record

Exclusion Criteria

Do NOT use M61.259 When
No specific exclusions found.

Related ICD-10 Codes

Related CPT Codes

73030CPT Code

Radiologic examination, thigh

Clinical Scenario

Used to assess calcification in the thigh muscles.

Documentation Requirements

Include imaging results and clinical findings.

Specialty Considerations

Orthopedic specialists should document the reason for imaging and any findings.

ICD-10 Impact

Diagnostic & Documentation Impact

Enhanced Specificity

ICD-10 Improvements

The transition to ICD-10 has allowed for more specific coding of conditions like paralytic calcification, improving the accuracy of data collection and reimbursement processes.

ICD-9 vs ICD-10

The transition to ICD-10 has allowed for more specific coding of conditions like paralytic calcification, improving the accuracy of data collection and reimbursement processes.

Reimbursement & Billing Impact

reimbursement processes.

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, neuromuscular disorders, trauma, and conditions leading to muscle disuse.