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 CodesM61.171

M61.171

Billable

Myositis ossificans progressiva, right ankle

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

Code Description

ICD-10 M61.171 is a billable code used to indicate a diagnosis of myositis ossificans progressiva, right ankle.

Key Diagnostic Point:

Myositis ossificans progressiva (MOP) is a rare genetic disorder characterized by the abnormal formation of bone in muscles and connective tissues. This condition typically manifests after trauma or injury, leading to progressive ossification of soft tissues, particularly in the limbs. In the case of M61.171, the ossification occurs specifically in the right ankle region. Patients may experience muscle weakness, stiffness, and limited range of motion due to the formation of bone where muscle tissue should be. The condition is often misdiagnosed as other musculoskeletal disorders, which can complicate treatment. Diagnosis is primarily clinical, supported by imaging studies such as X-rays or MRIs that reveal the characteristic calcifications. Management focuses on symptomatic relief and physical therapy, but surgical intervention may be necessary in severe cases to remove excess bone formation. Understanding the nuances of this condition is crucial for accurate coding and appropriate patient management.

Code Complexity Analysis

Complexity Rating: High

High Complexity

Complexity Factors

  • Rarity of the condition leading to limited familiarity among coders
  • Potential for misdiagnosis with other myositis or musculoskeletal disorders
  • Need for precise documentation of clinical findings and imaging results
  • Variability in treatment approaches that may affect coding

Audit Risk Factors

  • Inadequate documentation of clinical findings
  • Failure to include imaging results in the medical record
  • Misalignment between diagnosis and treatment provided
  • Inconsistent use of terminology in documentation

Specialty Focus

Medical Specialties

Rheumatology

Documentation Requirements

Detailed clinical notes on symptoms, physical examination findings, and imaging studies.

Common Clinical Scenarios

Patients presenting with unexplained muscle stiffness and swelling after trauma.

Billing Considerations

Ensure that genetic counseling and testing results are documented when applicable.

Orthopedics

Documentation Requirements

Surgical notes if intervention is performed, including pre-operative and post-operative assessments.

Common Clinical Scenarios

Patients requiring surgical intervention for severe ossification affecting mobility.

Billing Considerations

Document the extent of ossification and its impact on function.

Coding Guidelines

Inclusion Criteria

Use M61.171 When
  • Follow the official ICD
  • CM coding guidelines, ensuring that the diagnosis is supported by clinical documentation and imaging studies
  • Include any relevant history of trauma or genetic predisposition

Exclusion Criteria

Do NOT use M61.171 When
No specific exclusions found.

Related ICD-10 Codes

Related CPT Codes

20610CPT Code

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

Clinical Scenario

Used for symptomatic relief in patients with joint swelling due to myositis ossificans.

Documentation Requirements

Document the reason for the procedure, including clinical findings and imaging results.

Specialty Considerations

Orthopedic specialists should ensure that the procedure is justified based on the patient's symptoms.

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 myositis ossificans progressiva, improving the accuracy of data collection and reimbursement processes. This specificity helps in better tracking of rare conditions and their management.

ICD-9 vs ICD-10

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

Reimbursement & Billing Impact

reimbursement processes. This specificity helps in better tracking of rare conditions and their management.

Resources

Clinical References

  • •
    Myositis ossificans progressiva: A clinical overview

Coding & Billing References

  • •
    Myositis ossificans progressiva: A clinical overview

Frequently Asked Questions

What is myositis ossificans progressiva?

Myositis ossificans progressiva is a rare genetic disorder characterized by the abnormal formation of bone in muscles and connective tissues, often following trauma.

How is myositis ossificans progressiva diagnosed?

Diagnosis is primarily clinical, supported by imaging studies such as X-rays or MRIs that reveal characteristic calcifications in the affected area.

What are the treatment options for myositis ossificans progressiva?

Treatment focuses on managing symptoms, including physical therapy and pain management, with surgical intervention considered in severe cases.