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ICD-10 Guide
ICD-10 CodesM61.2

M61.2

Billable

Paralytic calcification and ossification of muscle

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

Code Description

ICD-10 M61.2 is a billable code used to indicate a diagnosis of paralytic calcification and ossification of muscle.

Key Diagnostic Point:

Paralytic calcification and ossification of muscle refers to the pathological process where muscle tissue undergoes calcification and ossification due to paralysis or disuse. This condition is often seen in patients with neuromuscular disorders, prolonged immobilization, or after significant trauma. The calcification can lead to stiffness, pain, and decreased range of motion in the affected muscles. It is important to differentiate this condition from other muscle disorders such as myositis, which involves inflammation of muscle tissue. The underlying mechanism often involves the deposition of calcium salts in muscle fibers, which can occur in response to muscle injury or degeneration. Clinically, patients may present with muscle weakness, limited mobility, and discomfort in the affected areas. Diagnosis typically involves imaging studies, such as X-rays or MRI, to visualize calcification and assess the extent of muscle involvement. Treatment may include physical therapy, pain management, and in some cases, surgical intervention to remove calcified tissue.

Code Complexity Analysis

Complexity Rating: Medium

Medium Complexity

Complexity Factors

  • Differentiation from other muscle disorders like myositis and dystrophies.
  • Need for precise documentation of paralysis and its duration.
  • Variability in clinical presentation and severity among patients.
  • Potential for co-existing conditions that may complicate coding.

Audit Risk Factors

  • Inadequate documentation of the underlying cause of paralysis.
  • Failure to document imaging studies that confirm calcification.
  • Misclassification of muscle disorders leading to incorrect coding.
  • Lack of clarity in the treatment plan and its relation to the diagnosis.

Specialty Focus

Medical Specialties

Neurology

Documentation Requirements

Detailed neurological examination findings, including muscle strength and reflexes.

Common Clinical Scenarios

Patients with neuromuscular diseases presenting with muscle weakness and calcification.

Billing Considerations

Ensure clear documentation of the neurological assessment and any imaging results.

Orthopedics

Documentation Requirements

Surgical notes if intervention is performed, imaging results, and physical therapy plans.

Common Clinical Scenarios

Post-surgical patients with immobilization leading to muscle calcification.

Billing Considerations

Document the relationship between immobilization and the development of calcification.

Coding Guidelines

Inclusion Criteria

Use M61.2 When
  • Follow the official ICD
  • CM coding guidelines, ensuring accurate documentation of the cause of paralysis and any imaging studies performed
  • 2 should be used when calcification is confirmed and related to paralysis

Exclusion Criteria

Do NOT use M61.2 When
No specific exclusions found.

Related ICD-10 Codes

Related CPT Codes

97001CPT Code

Physical therapy evaluation

Clinical Scenario

Used for assessing muscle function and planning rehabilitation for patients with calcification.

Documentation Requirements

Detailed evaluation of muscle strength and range of motion.

Specialty Considerations

Physical therapists should document the impact of calcification on mobility.

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 M61.2, which provides better granularity in capturing the nuances of muscle calcification and its causes.

ICD-9 vs ICD-10

The transition to ICD-10 has allowed for more specific coding of muscle disorders, including M61.2, which provides better granularity in capturing the nuances of muscle calcification and its causes.

Reimbursement & Billing Impact

The transition to ICD-10 has allowed for more specific coding of muscle disorders, including M61.2, which provides better granularity in capturing the nuances of muscle calcification and its causes.

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?

The primary cause of paralytic calcification is prolonged disuse or paralysis of muscle tissue, which leads to degeneration and subsequent calcification.

How can I differentiate M61.2 from myositis?

M61.2 is characterized by calcification due to paralysis, while myositis involves inflammation of muscle tissue. Documentation should clearly indicate the presence of calcification and the absence of inflammatory markers.