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ICD-10 Guide
ICD-10 CodesM61.551

M61.551

Billable

Other ossification of muscle, right thigh

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

Code Description

ICD-10 M61.551 is a billable code used to indicate a diagnosis of other ossification of muscle, right thigh.

Key Diagnostic Point:

M61.551 refers to a condition characterized by abnormal bone formation within the muscle tissue of the right thigh. This ossification can occur due to various factors, including trauma, prolonged immobilization, or certain metabolic disorders. Clinically, patients may present with muscle stiffness, pain, and reduced range of motion in the affected thigh. The condition can lead to significant functional impairment, affecting mobility and quality of life. Diagnosis typically involves imaging studies such as X-rays or MRI to visualize the ossified areas and differentiate them from other muscle disorders, such as myositis or muscle strains. Treatment may include physical therapy, pain management, and in some cases, surgical intervention to remove the ossified tissue. Understanding the underlying causes and associated conditions is crucial for effective management and coding.

Code Complexity Analysis

Complexity Rating: Medium

Medium Complexity

Complexity Factors

  • Differentiating from other muscle disorders like myositis or muscle strains.
  • Need for precise documentation of the location and extent of ossification.
  • Potential for overlapping symptoms with neuromuscular conditions.
  • Variability in treatment approaches based on underlying causes.

Audit Risk Factors

  • Inadequate documentation of the clinical findings.
  • Failure to specify the location of ossification.
  • Misdiagnosis or coding of similar conditions.
  • Lack of imaging studies to support the diagnosis.

Specialty Focus

Medical Specialties

Orthopedics

Documentation Requirements

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

Common Clinical Scenarios

Patients presenting with pain and stiffness in the thigh after trauma or surgery.

Billing Considerations

Ensure that all imaging studies are documented and correlate with the diagnosis.

Physical Medicine and Rehabilitation

Documentation Requirements

Comprehensive assessment of functional limitations and rehabilitation goals.

Common Clinical Scenarios

Patients requiring rehabilitation post-surgery for ossification removal.

Billing Considerations

Document progress and response to therapy to support ongoing treatment.

Coding Guidelines

Inclusion Criteria

Use M61.551 When
  • Follow the official ICD
  • CM guidelines for coding and reporting, ensuring that the code is used only when the condition is confirmed by clinical findings and imaging studies

Exclusion Criteria

Do NOT use M61.551 When
  • Exclude conditions that do not meet the criteria for ossification

Related ICD-10 Codes

Related CPT Codes

20610CPT Code

Arthrocentesis, aspiration and/or injection into a major joint or bursa

Clinical Scenario

Used when joint aspiration is performed due to associated joint pain.

Documentation Requirements

Document the reason for aspiration and findings.

Specialty Considerations

Orthopedic specialists should ensure correlation between the procedure and the diagnosis.

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 M61.551, improving the accuracy of data collection and reimbursement processes. It emphasizes the need for detailed documentation to support the diagnosis.

ICD-9 vs ICD-10

The transition to ICD-10 has allowed for more specific coding of conditions like M61.551, improving the accuracy of data collection and reimbursement processes. It emphasizes the need for detailed documentation to support the diagnosis.

Reimbursement & Billing Impact

reimbursement processes. It emphasizes the need for detailed documentation to support the diagnosis.

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 ossification of muscle?

Common causes include trauma, prolonged immobilization, and certain metabolic disorders. Each case should be evaluated individually to determine the underlying cause.