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v1.0.0
ICD-10 Guide
ICD-10 CodesM61.142

M61.142

Billable

Myositis ossificans progressiva, left hand

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

Code Description

ICD-10 M61.142 is a billable code used to indicate a diagnosis of myositis ossificans progressiva, left hand.

Key Diagnostic Point:

Myositis ossificans progressiva (MOP) is a rare genetic disorder characterized by the abnormal formation of bone in muscles, tendons, and other connective tissues. This condition is caused by mutations in the ACVR1 gene, which plays a crucial role in bone development and repair. Patients with MOP experience progressive muscle stiffness and weakness, often leading to significant functional impairment. The left hand may be specifically affected, resulting in reduced mobility and dexterity. Symptoms typically begin in childhood or early adulthood and can be triggered by trauma or injury, although they may also occur spontaneously. Diagnosis is primarily clinical, supported by imaging studies that reveal calcification in soft tissues. Management focuses on symptomatic relief and physical therapy, as surgical intervention is often complicated by the risk of further ossification. Understanding the implications of this condition is essential for accurate coding and treatment planning.

Code Complexity Analysis

Complexity Rating: High

High Complexity

Complexity Factors

  • Rare condition with limited awareness among healthcare providers
  • Requires precise documentation of symptoms and progression
  • Potential for misdiagnosis with other myositis conditions
  • Need for genetic testing results to confirm diagnosis

Audit Risk Factors

  • Inadequate documentation of genetic testing results
  • Failure to specify laterality (left hand)
  • Misclassification with other types of myositis
  • Lack of detailed clinical history

Specialty Focus

Medical Specialties

Rheumatology

Documentation Requirements

Detailed clinical notes on symptoms, progression, and treatment response.

Common Clinical Scenarios

Patients presenting with muscle stiffness and pain, particularly after trauma.

Billing Considerations

Documentation should include family history and any genetic testing performed.

Genetics

Documentation Requirements

Genetic testing results and family pedigree.

Common Clinical Scenarios

Patients with a family history of myositis ossificans or unexplained ossification.

Billing Considerations

Ensure that genetic counseling notes are included in the medical record.

Coding Guidelines

Inclusion Criteria

Use M61.142 When
  • Follow ICD
  • CM guidelines for coding myositis ossificans, ensuring accurate documentation of laterality and any associated conditions
  • Include any relevant history of trauma or genetic testing

Exclusion Criteria

Do NOT use M61.142 When
No specific exclusions found.

Related ICD-10 Codes

Related CPT Codes

99213CPT Code

Established patient office visit, Level 3

Clinical Scenario

Used for follow-up visits for management of myositis ossificans.

Documentation Requirements

Document history, examination findings, and treatment plan.

Specialty Considerations

Rheumatology may require additional details on functional status.

ICD-10 Impact

Diagnostic & Documentation Impact

Enhanced Specificity

ICD-10 Improvements

The transition to ICD-10 has allowed for more specific coding of rare conditions like myositis ossificans progressiva, improving data accuracy and treatment tracking.

ICD-9 vs ICD-10

The transition to ICD-10 has allowed for more specific coding of rare conditions like myositis ossificans progressiva, improving data accuracy and treatment tracking.

Reimbursement & Billing Impact

The transition to ICD-10 has allowed for more specific coding of rare conditions like myositis ossificans progressiva, improving data accuracy and treatment tracking.

Resources

Clinical References

  • •
    Myositis Association

Coding & Billing References

  • •
    Myositis Association

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, leading to stiffness and functional impairment.