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ICD-10 Guide
ICD-10 CodesM61.262

M61.262

Billable

Paralytic calcification and ossification of muscle, left lower leg

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

Code Description

ICD-10 M61.262 is a billable code used to indicate a diagnosis of paralytic calcification and ossification of muscle, left lower leg.

Key Diagnostic Point:

Paralytic calcification and ossification of muscle in the left lower leg is a condition characterized by the abnormal deposition of calcium salts and bone-like tissue in muscle fibers, often resulting from prolonged immobilization or denervation of the affected muscle. This condition can lead to significant muscle weakness and functional impairment, as the calcified areas can restrict normal muscle movement and contribute to pain. It is commonly associated with neuromuscular disorders, trauma, or conditions that lead to muscle paralysis. The left lower leg is specifically affected, which may result from localized injury or systemic conditions affecting muscle function. Diagnosis typically involves imaging studies such as X-rays or MRI to visualize calcification and ossification, alongside clinical evaluation of muscle strength and function. Treatment may include physical therapy, pain management, and in some cases, surgical intervention to remove calcified tissue. Understanding the underlying causes and associated conditions is crucial for effective management and rehabilitation.

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 specify the affected muscle and side.
  • Potential for overlap with other codes related to calcification and ossification.

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.
  • Misinterpretation of muscle weakness as a primary condition rather than a symptom.

Specialty Focus

Medical Specialties

Orthopedics

Documentation Requirements

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

Common Clinical Scenarios

Post-surgical patients with immobilization, patients with neuromuscular disorders.

Billing Considerations

Ensure that all relevant muscle groups are documented, especially in cases of bilateral involvement.

Neurology

Documentation Requirements

Comprehensive neurological assessments, including muscle strength testing and reflex evaluations.

Common Clinical Scenarios

Patients with conditions like stroke or spinal cord injury leading to muscle paralysis.

Billing Considerations

Document any underlying neurological conditions that may contribute to muscle calcification.

Coding Guidelines

Inclusion Criteria

Use M61.262 When
  • Follow the official ICD
  • CM coding guidelines, ensuring that the diagnosis is supported by clinical documentation
  • Include any relevant imaging studies and specify the affected muscle group

Exclusion Criteria

Do NOT use M61.262 When
  • Exclude conditions that do not meet the criteria for this diagnosis

Related ICD-10 Codes

Related CPT Codes

97001CPT Code

Physical therapy evaluation

Clinical Scenario

Used for assessing muscle function and planning rehabilitation.

Documentation Requirements

Detailed evaluation of muscle strength, range of motion, and functional limitations.

Specialty Considerations

Orthopedic and rehabilitation specialists should document the specific muscle groups affected.

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, improving the accuracy of diagnoses and treatment planning. M61.262 provides a clear distinction for calcification and ossification, which was less defined in ICD-9.

ICD-9 vs ICD-10

The transition to ICD-10 has allowed for more specific coding of muscle disorders, improving the accuracy of diagnoses and treatment planning. M61.262 provides a clear distinction for calcification and ossification, which was less defined in ICD-9.

Reimbursement & Billing Impact

The transition to ICD-10 has allowed for more specific coding of muscle disorders, improving the accuracy of diagnoses and treatment planning. M61.262 provides a clear distinction for calcification and ossification, which was less defined in ICD-9.

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 is the primary cause of paralytic calcification?

Paralytic calcification is primarily caused by prolonged immobilization or denervation of muscles, leading to necrosis and subsequent calcification.