ICD-10 Logo
ICDxICD-10 Medical Coding
ICD-10 Logo
ICDxICD-10 Medical Coding
ICD 10 CodesDiagnoses
ICD 10 CodesDiagnoses
ICD-10 Logo
ICDxICD-10 Medical Coding

Comprehensive ICD-10-CM code reference with AI-powered search capabilities.

© 2025 ICD Code Compass. All rights reserved.

Browse

  • All Chapters
  • All Categories
  • Diagnoses

Tools

  • AI Code Search
ICD-10-CM codes are maintained by the CDC and CMS. This tool is for reference purposes only.
v1.0.0
ICD-10 Guide
ICD-10 CodesM61.55

M61.55

Billable

Other ossification of muscle, thigh

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

Code Description

ICD-10 M61.55 is a billable code used to indicate a diagnosis of other ossification of muscle, thigh.

Key Diagnostic Point:

M61.55 refers to a condition characterized by abnormal ossification or bone formation within the muscle tissue of the thigh. This condition can arise due to various factors, including trauma, inflammation, or certain genetic disorders. The ossification process can lead to stiffness, pain, and reduced range of motion in the affected muscle. Clinically, patients may present with muscle weakness, swelling, and tenderness in the thigh region. Myositis, an inflammatory condition of the muscle, can also be associated with ossification, complicating the clinical picture. Neuromuscular conditions may further exacerbate muscle weakness, making diagnosis and management challenging. Accurate diagnosis often requires imaging studies such as X-rays or MRIs to visualize the ossified areas and differentiate them from other muscle disorders. Treatment may involve physical therapy, pain management, and in some cases, surgical intervention to remove the ossified tissue. Understanding the underlying cause of the ossification is crucial for effective management and rehabilitation.

Code Complexity Analysis

Complexity Rating: Medium

Medium Complexity

Complexity Factors

  • Differentiation from other muscle disorders
  • Need for comprehensive documentation of symptoms
  • Potential overlap with myositis and other neuromuscular conditions
  • Variability in clinical presentation

Audit Risk Factors

  • Inadequate documentation of clinical findings
  • Failure to specify the location of ossification
  • Lack of imaging reports to support diagnosis
  • Misclassification with other muscle disorders

Specialty Focus

Medical Specialties

Orthopedics

Documentation Requirements

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

Common Clinical Scenarios

Patients presenting with thigh pain and limited mobility due to ossification.

Billing Considerations

Orthopedic specialists should ensure that all imaging studies are clearly documented to support the diagnosis.

Rheumatology

Documentation Requirements

Comprehensive history of inflammatory symptoms, lab results, and response to treatment.

Common Clinical Scenarios

Patients with myositis who develop ossification as a complication.

Billing Considerations

Rheumatologists must differentiate between primary muscle inflammation and secondary ossification.

Coding Guidelines

Inclusion Criteria

Use M61.55 When
  • According to ICD
  • 10 guidelines, M61
  • 55 should be used when there is clear documentation of ossification in the thigh muscle
  • It is important to include any relevant history of trauma or inflammatory conditions

Exclusion Criteria

Do NOT use M61.55 When
  • Exclusion criteria include conditions that do not involve 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 a patient with ossification presents with joint pain requiring aspiration.

Documentation Requirements

Document the reason for the procedure, findings, and any imaging results.

Specialty Considerations

Orthopedic specialists should ensure that the procedure is justified based on clinical findings.

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 M61.55, improving the accuracy of diagnoses and treatment plans. This specificity aids in better tracking of patient outcomes and resource allocation.

ICD-9 vs ICD-10

The transition to ICD-10 has allowed for more specific coding of conditions like M61.55, improving the accuracy of diagnoses and treatment plans. This specificity aids in better tracking of patient outcomes and resource allocation.

Reimbursement & Billing Impact

The transition to ICD-10 has allowed for more specific coding of conditions like M61.55, improving the accuracy of diagnoses and treatment plans. This specificity aids in better tracking of patient outcomes and resource allocation.

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 symptoms associated with M61.55?

Common symptoms include thigh pain, stiffness, swelling, and reduced range of motion. Patients may also experience muscle weakness and tenderness in the affected area.