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ICD-10 Guide
ICD-10 CodesM66.142

M66.142

Billable

Rupture of synovium, left hand

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

Code Description

ICD-10 M66.142 is a billable code used to indicate a diagnosis of rupture of synovium, left hand.

Key Diagnostic Point:

Rupture of the synovium in the left hand refers to the tearing or disruption of the synovial membrane, which lines the joints and tendon sheaths. This condition can occur due to trauma, repetitive stress, or underlying inflammatory conditions such as rheumatoid arthritis or tenosynovitis. 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 hand. Patients may present with localized tenderness, warmth, and swelling, often accompanied by difficulty in performing daily activities. Diagnosis typically involves a thorough clinical examination, imaging studies such as ultrasound or MRI, and sometimes arthroscopy. Treatment may include conservative measures like rest, ice, and anti-inflammatory medications, or more invasive options such as corticosteroid injections or surgical repair if conservative management fails. Surgical intervention may involve synovectomy or repair of the ruptured synovium, depending on the extent of the damage and the presence of any associated tendon injuries.

Code Complexity Analysis

Complexity Rating: Medium

Medium Complexity

Complexity Factors

  • Differentiating between types of synovial disorders
  • Identifying associated tendon injuries
  • Understanding the implications of underlying conditions like rheumatoid arthritis
  • Variability in documentation quality from different specialties

Audit Risk Factors

  • Inadequate documentation of the mechanism of injury
  • Failure to document associated conditions
  • Misclassification of the type of rupture
  • Lack of imaging studies to support diagnosis

Specialty Focus

Medical Specialties

Orthopedics

Documentation Requirements

Detailed surgical notes, imaging results, and pre/post-operative assessments.

Common Clinical Scenarios

Patients presenting with acute hand injuries, chronic pain due to repetitive strain, or post-surgical follow-ups.

Billing Considerations

Ensure clear documentation of the extent of the rupture and any associated tendon injuries.

Rheumatology

Documentation Requirements

Comprehensive history of joint symptoms, laboratory results, and imaging studies.

Common Clinical Scenarios

Patients with inflammatory arthritis presenting with joint swelling and pain.

Billing Considerations

Document any underlying autoimmune conditions that may contribute to synovial rupture.

Coding Guidelines

Inclusion Criteria

Use M66.142 When
  • According to ICD
  • 10 guidelines, M66
  • 142 should be used when there is a confirmed rupture of the synovium in the left hand
  • It is essential to document the specific location and any associated injuries

Exclusion Criteria

Do NOT use M66.142 When
  • Exclusion criteria include conditions that do not involve synovial rupture

Related ICD-10 Codes

Related CPT Codes

29875CPT Code

Arthroscopy, wrist, diagnostic, with or without synovial biopsy

Clinical Scenario

Used when performing an arthroscopy to assess the extent of synovial damage.

Documentation Requirements

Document the findings from the arthroscopy and any interventions performed.

Specialty Considerations

Orthopedic surgeons should ensure detailed operative notes are provided.

ICD-10 Impact

Diagnostic & Documentation Impact

Enhanced Specificity

ICD-10 Improvements

The transition to ICD-10 has allowed for more specific coding of conditions like synovial rupture, improving the accuracy of claims and facilitating better patient care through detailed data collection.

ICD-9 vs ICD-10

The transition to ICD-10 has allowed for more specific coding of conditions like synovial rupture, improving the accuracy of claims and facilitating better patient care through detailed data collection.

Reimbursement & Billing Impact

The transition to ICD-10 has allowed for more specific coding of conditions like synovial rupture, improving the accuracy of claims and facilitating better patient care through detailed data collection.

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?

Synovial rupture can be caused by trauma, repetitive strain, or underlying inflammatory conditions such as rheumatoid arthritis or tenosynovitis.

How is a synovial rupture diagnosed?

Diagnosis typically involves a clinical examination, imaging studies such as ultrasound or MRI, and sometimes arthroscopy to assess the extent of the injury.

What are the treatment options for a ruptured synovium?

Treatment may include conservative measures like rest and anti-inflammatory medications, or surgical options such as synovectomy or repair, depending on the severity of the rupture.