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ICD-10 Guide
ICD-10 CodesM66.38

M66.38

Billable

Spontaneous rupture of flexor tendons, other site

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

Code Description

ICD-10 M66.38 is a billable code used to indicate a diagnosis of spontaneous rupture of flexor tendons, other site.

Key Diagnostic Point:

Spontaneous rupture of flexor tendons, particularly in the hand and wrist, can occur due to various underlying conditions, including inflammatory diseases, chronic tenosynovitis, or degenerative changes. This condition is characterized by the sudden tearing of the tendon fibers, which may lead to loss of function and pain in the affected area. The flexor tendons are crucial for hand movements, and their rupture can significantly impair a patient's ability to perform daily activities. Diagnosis typically involves a thorough clinical examination, imaging studies such as ultrasound or MRI, and sometimes arthroscopy to assess the extent of the injury. Treatment options may include conservative management with splinting and physical therapy or surgical intervention to repair the tendon. Surgical repair often involves suturing the tendon ends together or using grafts if the rupture is extensive. Post-operative rehabilitation is essential for restoring function and strength to the affected hand.

Code Complexity Analysis

Complexity Rating: Medium

Medium Complexity

Complexity Factors

  • Variability in clinical presentation and underlying causes
  • Need for precise documentation of the rupture site
  • Differentiation from other tendon injuries
  • Potential for co-existing conditions affecting treatment

Audit Risk Factors

  • Inadequate documentation of the rupture site
  • Failure to specify underlying conditions contributing to the rupture
  • Lack of clarity in surgical reports
  • Inconsistent coding of associated diagnoses

Specialty Focus

Medical Specialties

Orthopedic Surgery

Documentation Requirements

Detailed operative notes, including the type of repair performed and any grafts used.

Common Clinical Scenarios

Patients presenting with acute hand pain and loss of function following a sudden injury or without a clear traumatic event.

Billing Considerations

Ensure that all relevant imaging studies and pre-operative assessments are documented.

Rheumatology

Documentation Requirements

Comprehensive history of inflammatory conditions and their management.

Common Clinical Scenarios

Patients with chronic inflammatory diseases presenting with tendon ruptures.

Billing Considerations

Document the relationship between underlying rheumatologic conditions and tendon integrity.

Coding Guidelines

Inclusion Criteria

Use M66.38 When
  • Follow official ICD
  • 10 coding guidelines, ensuring accurate documentation of the rupture site and any associated conditions
  • Include relevant details about the patient's history and treatment plan

Exclusion Criteria

Do NOT use M66.38 When
No specific exclusions found.

Related ICD-10 Codes

Related CPT Codes

26301CPT Code

Repair of flexor tendon

Clinical Scenario

Used when surgical repair is performed for a spontaneous rupture.

Documentation Requirements

Operative report detailing the procedure and any grafts used.

Specialty Considerations

Orthopedic surgeons should ensure all aspects of the repair are documented.

ICD-10 Impact

Diagnostic & Documentation Impact

Enhanced Specificity

ICD-10 Improvements

The transition to ICD-10 has allowed for more specific coding of spontaneous tendon ruptures, improving the accuracy of data collection and reimbursement processes.

ICD-9 vs ICD-10

The transition to ICD-10 has allowed for more specific coding of spontaneous tendon ruptures, improving the accuracy of data collection and reimbursement processes.

Reimbursement & Billing Impact

reimbursement processes.

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 spontaneous rupture of flexor tendons?

Common causes include chronic inflammatory conditions, degenerative changes, and repetitive strain injuries. Patients with underlying conditions like rheumatoid arthritis or diabetes are at higher risk.