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 CodesM66.145

M66.145

Billable

Rupture of synovium, left finger(s)

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

Code Description

ICD-10 M66.145 is a billable code used to indicate a diagnosis of rupture of synovium, left finger(s).

Key Diagnostic Point:

Rupture of the synovium in the left finger(s) refers to the tearing or disruption of the synovial membrane that lines the joints and tendon sheaths in the fingers. This condition can occur due to trauma, repetitive stress, or underlying inflammatory conditions such as rheumatoid arthritis. The synovium plays a crucial role in joint health by producing synovial fluid, which lubricates the joints and nourishes the cartilage. When the synovium ruptures, it can lead to pain, swelling, and decreased range of motion in the affected finger(s). Patients may present with localized tenderness, swelling, and sometimes a palpable defect in the area. Diagnosis is typically made through clinical examination and may be supported by imaging studies such as ultrasound or MRI to assess the extent of the rupture and any associated tendon injuries. Treatment options may include conservative management with rest, splinting, and anti-inflammatory medications, or surgical intervention to repair the synovium and any involved tendons if conservative measures fail.

Code Complexity Analysis

Complexity Rating: Medium

Medium Complexity

Complexity Factors

  • Differentiating between various types of synovial injuries
  • Understanding the relationship between synovial rupture and associated tendon injuries
  • Documentation requirements for surgical versus non-surgical treatment
  • Variability in clinical presentation and diagnostic imaging findings

Audit Risk Factors

  • Inadequate documentation of the mechanism of injury
  • Failure to specify laterality (left vs. right)
  • Lack of imaging studies to support the diagnosis
  • Inconsistent coding of associated tendon injuries

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 finger pain following trauma or chronic pain due to repetitive use.

Billing Considerations

Ensure clear documentation of any surgical interventions performed, including repair techniques.

Rheumatology

Documentation Requirements

Comprehensive assessment of underlying inflammatory conditions and their impact on synovial health.

Common Clinical Scenarios

Patients with rheumatoid arthritis experiencing acute exacerbations leading to synovial rupture.

Billing Considerations

Document the relationship between systemic disease and local joint pathology.

Coding Guidelines

Inclusion Criteria

Use M66.145 When
  • Follow official ICD
  • CM guidelines for coding injuries, ensuring accurate documentation of laterality and specificity of the injury
  • Include any relevant co
  • morbidities that may affect treatment

Exclusion Criteria

Do NOT use M66.145 When
No specific exclusions found.

Related ICD-10 Codes

Related CPT Codes

26340CPT Code

Repair of ruptured tendon

Clinical Scenario

Used when surgical repair of the ruptured synovium and associated tendon is performed.

Documentation Requirements

Operative report detailing the procedure and findings.

Specialty Considerations

Orthopedic documentation must include specifics of the repair technique.

ICD-10 Impact

Diagnostic & Documentation Impact

Enhanced Specificity

ICD-10 Improvements

The transition to ICD-10 has allowed for more specific coding of synovial 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 synovial 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 synovial 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 synovial rupture in fingers?

Synovial rupture in fingers can be caused by acute trauma, repetitive stress injuries, or underlying inflammatory conditions such as rheumatoid arthritis.