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 CodesM66.87

M66.87

Billable

Spontaneous rupture of other tendons, ankle and foot

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

Code Description

ICD-10 M66.87 is a billable code used to indicate a diagnosis of spontaneous rupture of other tendons, ankle and foot.

Key Diagnostic Point:

Spontaneous rupture of tendons in the ankle and foot can occur due to various factors, including underlying degenerative conditions, inflammatory processes, or acute trauma. This condition is characterized by the sudden tearing of tendons, which may lead to significant pain, swelling, and functional impairment. Commonly affected tendons include the peroneal tendons, Achilles tendon, and flexor tendons. Patients may present with symptoms such as localized tenderness, inability to bear weight, and a palpable defect in the tendon. Diagnosis typically involves a thorough clinical examination and imaging studies, such as ultrasound or MRI, to confirm the rupture and assess the extent of the injury. Treatment options may vary from conservative management, including rest and physical therapy, to surgical intervention for complete ruptures. Surgical repair aims to restore tendon integrity and function, often involving techniques such as tendon reattachment or grafting. The prognosis depends on the severity of the rupture and the timeliness of intervention.

Code Complexity Analysis

Complexity Rating: Medium

Medium Complexity

Complexity Factors

  • Variability in clinical presentation and severity of tendon ruptures
  • Need for precise documentation of the mechanism of injury
  • Differentiation from other tendon injuries and conditions
  • Potential for co-existing conditions affecting treatment and coding

Audit Risk Factors

  • Inadequate documentation of the mechanism of injury
  • Failure to specify the tendon involved
  • Lack of imaging studies to support diagnosis
  • Inconsistent treatment documentation

Specialty Focus

Medical Specialties

Orthopedic Surgery

Documentation Requirements

Detailed operative reports, imaging results, and pre-operative assessments.

Common Clinical Scenarios

Patients presenting with acute ankle pain and swelling after a fall or sports injury.

Billing Considerations

Ensure clear documentation of the tendon involved and the surgical technique used.

Physical Medicine and Rehabilitation

Documentation Requirements

Comprehensive evaluations, treatment plans, and progress notes.

Common Clinical Scenarios

Patients undergoing rehabilitation post-surgery for tendon repair.

Billing Considerations

Document functional limitations and response to therapy for accurate coding.

Coding Guidelines

Inclusion Criteria

Use M66.87 When
  • Follow official ICD
  • CM coding guidelines, ensuring accurate documentation of the specific tendon involved and the nature of the rupture
  • Include any relevant co
  • morbidities that may affect treatment

Exclusion Criteria

Do NOT use M66.87 When
No specific exclusions found.

Related ICD-10 Codes

Related CPT Codes

27658CPT Code

Repair of tendon, ankle and foot

Clinical Scenario

Used in cases of surgical repair following spontaneous rupture.

Documentation Requirements

Operative report detailing the procedure and findings.

Specialty Considerations

Orthopedic surgeons must document the specific tendon repaired.

ICD-10 Impact

Diagnostic & Documentation Impact

Enhanced Specificity

ICD-10 Improvements

The transition to ICD-10 has allowed for more specific coding of tendon injuries, improving the accuracy of claims and facilitating better patient care through detailed documentation.

ICD-9 vs ICD-10

The transition to ICD-10 has allowed for more specific coding of tendon injuries, improving the accuracy of claims and facilitating better patient care through detailed documentation.

Reimbursement & Billing Impact

The transition to ICD-10 has allowed for more specific coding of tendon injuries, improving the accuracy of claims and facilitating better patient care through detailed documentation.

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 is the primary cause of spontaneous tendon ruptures?

Spontaneous tendon ruptures are often associated with underlying degenerative conditions, inflammatory diseases, or chronic overuse, leading to weakened tendon structure.