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ICD-10 Guide
ICD-10 CodesM61.231

M61.231

Billable

Paralytic calcification and ossification of muscle, right forearm

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

Code Description

ICD-10 M61.231 is a billable code used to indicate a diagnosis of paralytic calcification and ossification of muscle, right forearm.

Key Diagnostic Point:

Paralytic calcification and ossification of muscle, specifically in the right forearm, refers to the pathological deposition of calcium salts in muscle tissue due to prolonged immobilization or denervation. This condition often arises in patients with neuromuscular disorders, where muscle weakness leads to disuse. The calcification can result in stiffness, pain, and reduced range of motion, significantly impacting the patient's quality of life. The right forearm is particularly affected, which may be due to localized trauma or a specific neurological condition affecting the muscles in that area. Diagnosis typically involves imaging studies such as X-rays or MRI to visualize the calcified areas, alongside clinical evaluation of muscle strength and function. Treatment may include physical therapy, pain management, and in some cases, surgical intervention to remove the calcified tissue. Understanding the underlying neuromuscular conditions contributing to this disorder is crucial for effective management and rehabilitation.

Code Complexity Analysis

Complexity Rating: Medium

Medium Complexity

Complexity Factors

  • Requires understanding of neuromuscular conditions and their impact on muscle health.
  • Differentiation from other muscle disorders such as myositis or dystrophies.
  • Need for precise documentation of the affected area and underlying causes.
  • Potential for co-morbid conditions that may complicate coding.

Audit Risk Factors

  • Inadequate documentation of the underlying neuromuscular condition.
  • Failure to specify the affected muscle group or side.
  • Misinterpretation of imaging results leading to incorrect coding.
  • Lack of clarity in treatment plans or physical therapy notes.

Specialty Focus

Medical Specialties

Neurology

Documentation Requirements

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

Common Clinical Scenarios

Patients with stroke, spinal cord injury, or other conditions leading to muscle weakness.

Billing Considerations

Documentation must clearly link muscle weakness to the calcification observed.

Physical Medicine and Rehabilitation

Documentation Requirements

Comprehensive assessment of muscle function, therapy progress notes, and rehabilitation goals.

Common Clinical Scenarios

Rehabilitation following immobilization or surgery, addressing muscle stiffness and weakness.

Billing Considerations

Focus on functional outcomes and the impact of calcification on rehabilitation.

Coding Guidelines

Inclusion Criteria

Use M61.231 When
  • According to ICD
  • 10 coding guidelines, M61
  • 231 should be used when there is clear documentation of paralytic calcification and ossification specifically in the right forearm
  • Coders must ensure that the diagnosis is supported by clinical findings and imaging studies

Exclusion Criteria

Do NOT use M61.231 When
  • Exclusion criteria include conditions that do not involve calcification or ossification

Related ICD-10 Codes

Related CPT Codes

97001CPT Code

Physical therapy evaluation

Clinical Scenario

Used when evaluating a patient with muscle calcification for rehabilitation.

Documentation Requirements

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

Specialty Considerations

Physical therapists should document specific goals and treatment plans.

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 M61.231, improving the accuracy of data collection and reimbursement processes. This specificity helps in better tracking of muscle disorders and their management.

ICD-9 vs ICD-10

The transition to ICD-10 has allowed for more specific coding of conditions like M61.231, improving the accuracy of data collection and reimbursement processes. This specificity helps in better tracking of muscle disorders and their management.

Reimbursement & Billing Impact

reimbursement processes. This specificity helps in better tracking of muscle disorders and their management.

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 disuse of muscles, often due to neurological conditions that lead to muscle weakness or paralysis.