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ICD-10 Guide
ICD-10 CodesM61.271

M61.271

Billable

Paralytic calcification and ossification of muscle, right ankle and foot

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

Code Description

ICD-10 M61.271 is a billable code used to indicate a diagnosis of paralytic calcification and ossification of muscle, right ankle and foot.

Key Diagnostic Point:

Paralytic calcification and ossification of muscle refers to the abnormal deposition of calcium salts in muscle tissue, particularly in the context of muscle paralysis. This condition can occur following prolonged immobilization or disuse of the affected muscles, leading to muscle weakness and atrophy. In the case of the right ankle and foot, the calcification may result from conditions such as myositis, where inflammation of the muscle tissue can lead to necrosis and subsequent calcification. The ossification process may further complicate the clinical picture, as it can lead to stiffness and reduced range of motion in the affected joints. Patients may experience pain, swelling, and functional impairment, which can significantly impact their quality of life. Diagnosis typically involves imaging studies such as X-rays or MRI to assess the extent of calcification and ossification, alongside a thorough clinical evaluation to rule out other neuromuscular conditions. 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

  • Requires understanding of muscle pathology and neuromuscular disorders
  • Differentiation from other calcification disorders
  • Need for precise documentation of muscle involvement
  • Potential for co-morbid conditions affecting coding

Audit Risk Factors

  • Inadequate documentation of muscle involvement
  • Failure to specify laterality (right vs. left)
  • Misclassification of calcification type
  • Lack of supporting imaging studies

Specialty Focus

Medical Specialties

Orthopedics

Documentation Requirements

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

Common Clinical Scenarios

Post-surgical complications, trauma-related calcification, and chronic immobilization cases.

Billing Considerations

Ensure clarity on the extent of muscle involvement and any associated joint issues.

Neurology

Documentation Requirements

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

Common Clinical Scenarios

Patients with neuromuscular disorders leading to muscle weakness and subsequent calcification.

Billing Considerations

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

Coding Guidelines

Inclusion Criteria

Use M61.271 When
  • Follow the official ICD
  • CM coding guidelines, ensuring accurate documentation of the condition's specifics, including laterality and any associated conditions
  • Include relevant clinical findings and imaging results to support the diagnosis

Exclusion Criteria

Do NOT use M61.271 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 treatment for M61.271.

Documentation Requirements

Detailed evaluation of muscle strength and functional limitations.

Specialty Considerations

Physical therapists should document specific findings related to muscle calcification.

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 M61.271, improving the accuracy of data collection and reimbursement processes. This specificity helps in better tracking of muscle disorders and their treatment outcomes.

ICD-9 vs ICD-10

The transition to ICD-10 has allowed for more specific coding of conditions like M61.271, improving the accuracy of data collection and reimbursement processes. This specificity helps in better tracking of muscle disorders and their treatment outcomes.

Reimbursement & Billing Impact

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

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 disuse of muscles, leading to muscle atrophy and subsequent calcification.