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v1.0.0
ICD-10 Guide
ICD-10 CodesM66.84

M66.84

Billable

Spontaneous rupture of other tendons, hand

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

Code Description

ICD-10 M66.84 is a billable code used to indicate a diagnosis of spontaneous rupture of other tendons, hand.

Key Diagnostic Point:

Spontaneous rupture of tendons in the hand 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 can lead to significant functional impairment and pain. Commonly affected tendons include those associated with the flexor and extensor muscles of the fingers and wrist. The rupture may be associated with tenosynovitis, where inflammation of the synovial sheath surrounding the tendon occurs, often leading to swelling and pain. Diagnosis typically involves a thorough clinical examination, imaging studies such as ultrasound or MRI, and sometimes diagnostic injections. Treatment may vary from conservative management, including rest and physical therapy, to surgical intervention for tendon repair or reconstruction, depending on the severity of the rupture and the patient's functional needs. Accurate coding is essential for proper reimbursement and to reflect the complexity of the condition and its management.

Code Complexity Analysis

Complexity Rating: Medium

Medium Complexity

Complexity Factors

  • Differentiating between spontaneous and traumatic ruptures
  • Identifying the specific tendon involved
  • Documenting associated conditions like tenosynovitis
  • Understanding the implications of surgical versus non-surgical treatment

Audit Risk Factors

  • Inadequate documentation of the spontaneous nature of the rupture
  • Failure to specify the tendon involved
  • Lack of imaging or clinical evidence to support the diagnosis
  • Improper coding of associated conditions like tenosynovitis

Specialty Focus

Medical Specialties

Orthopedic Surgery

Documentation Requirements

Detailed operative reports, imaging studies, and pre-operative assessments are necessary.

Common Clinical Scenarios

Patients presenting with acute pain and loss of function in the hand following a sudden event.

Billing Considerations

Documentation must clearly indicate the mechanism of injury and the specific tendon involved.

Rheumatology

Documentation Requirements

Comprehensive history of inflammatory conditions, lab results, and imaging findings.

Common Clinical Scenarios

Patients with chronic inflammatory diseases presenting with tendon ruptures.

Billing Considerations

Must document the relationship between underlying rheumatologic conditions and tendon integrity.

Coding Guidelines

Inclusion Criteria

Use M66.84 When
  • Follow official ICD
  • CM coding guidelines, ensuring accurate documentation of the spontaneous nature of the rupture and any associated conditions
  • Include details about the specific tendon affected and the treatment provided

Exclusion Criteria

Do NOT use M66.84 When
No specific exclusions found.

Related ICD-10 Codes

Related CPT Codes

26301CPT Code

Repair of tendon, hand

Clinical Scenario

Used when surgical repair is performed for a spontaneous tendon rupture.

Documentation Requirements

Operative report detailing the procedure and findings.

Specialty Considerations

Orthopedic documentation must include pre-operative assessments and post-operative care plans.

ICD-10 Impact

Diagnostic & Documentation Impact

Enhanced Specificity

ICD-10 Improvements

The transition to ICD-10 has allowed for more specific coding of tendon ruptures, improving the ability to capture the complexity of these conditions and their management.

ICD-9 vs ICD-10

The transition to ICD-10 has allowed for more specific coding of tendon ruptures, improving the ability to capture the complexity of these conditions and their management.

Reimbursement & Billing Impact

The transition to ICD-10 has allowed for more specific coding of tendon ruptures, improving the ability to capture the complexity of these conditions and their management.

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 spontaneous and traumatic tendon rupture?

Spontaneous tendon rupture occurs without an identifiable external force, often due to underlying conditions, while traumatic rupture is a direct result of an injury or accident.