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ICD-10 Guide
ICD-10 CodesM66.89

M66.89

Billable

Spontaneous rupture of other tendons, multiple sites

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

Code Description

ICD-10 M66.89 is a billable code used to indicate a diagnosis of spontaneous rupture of other tendons, multiple sites.

Key Diagnostic Point:

Spontaneous rupture of tendons is a condition characterized by the sudden tearing of tendons without any significant trauma or injury. This can occur in various tendons throughout the body, often affecting those that are already compromised due to underlying conditions such as tenosynovitis, which is inflammation of the synovial sheath surrounding the tendon. The condition can lead to acute pain, swelling, and loss of function in the affected area. Patients may present with symptoms such as a 'popping' sensation at the time of rupture, followed by immediate pain and swelling. The diagnosis is typically confirmed through clinical examination and imaging studies, such as ultrasound or MRI, which can visualize the extent of the rupture. Treatment may involve conservative management, including rest and physical therapy, or surgical intervention to repair the ruptured tendon, especially in cases where function is significantly impaired. The spontaneous nature of these ruptures often complicates the clinical picture, as they may occur in patients with no prior history of tendon issues, making accurate diagnosis and coding essential.

Code Complexity Analysis

Complexity Rating: Medium

Medium Complexity

Complexity Factors

  • Variety of tendons affected can complicate diagnosis.
  • Differentiation from traumatic ruptures is necessary.
  • Requires thorough documentation of clinical findings.
  • Potential for co-existing conditions like tenosynovitis.

Audit Risk Factors

  • Inadequate documentation of the spontaneous nature of the rupture.
  • Failure to specify the number of sites affected.
  • Lack of imaging results in the medical record.
  • Misclassification of the rupture as traumatic.

Specialty Focus

Medical Specialties

Orthopedics

Documentation Requirements

Detailed notes on the mechanism of injury, physical examination findings, and imaging results.

Common Clinical Scenarios

Patients presenting with acute pain and swelling in multiple joints or tendons, often after minimal or no trauma.

Billing Considerations

Ensure to document any pre-existing conditions that may contribute to tendon weakness.

Rheumatology

Documentation Requirements

Comprehensive history of joint and tendon issues, including any autoimmune conditions.

Common Clinical Scenarios

Patients with systemic inflammatory diseases presenting with tendon ruptures.

Billing Considerations

Document the relationship between systemic conditions and tendon health.

Coding Guidelines

Inclusion Criteria

Use M66.89 When
  • Follow official coding guidelines that specify the need for clear documentation of the spontaneous nature of the rupture and any associated conditions
  • Ensure that the code reflects the number of sites affected

Exclusion Criteria

Do NOT use M66.89 When
No specific exclusions found.

Related ICD-10 Codes

Related CPT Codes

29827CPT Code

Arthroscopy, shoulder, surgical; with rotator cuff repair

Clinical Scenario

Used when surgical repair is performed for a spontaneous rupture of the rotator cuff.

Documentation Requirements

Operative report detailing the procedure and findings.

Specialty Considerations

Orthopedic documentation must include pre-operative assessments.

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 is the difference between M66.89 and M66.88?

M66.89 is used for spontaneous ruptures of multiple tendons, while M66.88 is for a single tendon. Accurate coding depends on the number of sites affected.