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ICD-10 Guide
ICD-10 CodesM66.175

M66.175

Billable

Rupture of synovium, left foot

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

Code Description

ICD-10 M66.175 is a billable code used to indicate a diagnosis of rupture of synovium, left foot.

Key Diagnostic Point:

Rupture of the synovium in the left foot 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. 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 swelling, pain, and decreased mobility in the affected foot. Symptoms may include localized tenderness, swelling, and a feeling of instability in the joint. Diagnosis typically involves a physical examination, imaging studies such as ultrasound or MRI, and sometimes aspiration of joint fluid to assess for inflammation or infection. Treatment may involve conservative measures such as rest, ice, compression, and elevation (RICE), as well as physical therapy. In more severe cases, surgical intervention may be necessary to repair the ruptured synovium or address any associated tendon injuries. Accurate coding is essential for proper reimbursement and to reflect the complexity of the patient's condition.

Code Complexity Analysis

Complexity Rating: Medium

Medium Complexity

Complexity Factors

  • Differentiating between types of synovial injuries
  • Understanding associated conditions like tenosynovitis
  • Identifying the specific location of the rupture
  • Documenting the severity and treatment plan

Audit Risk Factors

  • Inadequate documentation of the mechanism of injury
  • Failure to specify the exact location of the rupture
  • Lack of supporting imaging studies
  • Inconsistent treatment documentation

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 foot pain following trauma or chronic pain due to repetitive stress.

Billing Considerations

Ensure that all surgical interventions are documented, including pre-operative and post-operative care.

Rheumatology

Documentation Requirements

Comprehensive assessment of inflammatory markers and joint function.

Common Clinical Scenarios

Patients with autoimmune conditions presenting with joint swelling and pain.

Billing Considerations

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

Coding Guidelines

Inclusion Criteria

Use M66.175 When
  • Follow official ICD
  • 10 coding guidelines, ensuring accurate documentation of the rupture's location and associated conditions
  • Include any relevant imaging studies and treatment plans to support the diagnosis

Exclusion Criteria

Do NOT use M66.175 When
No specific exclusions found.

Related ICD-10 Codes

Related CPT Codes

28200CPT Code

Repair of ruptured tendon

Clinical Scenario

Used when surgical intervention is required for a ruptured synovium affecting tendon function.

Documentation Requirements

Document the surgical procedure, findings, and post-operative care.

Specialty Considerations

Orthopedic surgeons should provide detailed operative notes.

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 diagnoses and treatment plans. M66.175 provides a clear designation for ruptures, facilitating better patient management and reimbursement.

ICD-9 vs ICD-10

The transition to ICD-10 has allowed for more specific coding of synovial injuries, improving the accuracy of diagnoses and treatment plans. M66.175 provides a clear designation for ruptures, facilitating better patient management and reimbursement.

Reimbursement & Billing Impact

reimbursement.

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 are the common causes of synovial rupture?

Common causes include acute trauma, repetitive stress injuries, and underlying inflammatory conditions such as rheumatoid arthritis or gout.

How is a synovial rupture diagnosed?

Diagnosis typically involves a physical examination, imaging studies like MRI or ultrasound, and sometimes aspiration of joint fluid to assess for inflammation.

What treatments are available for a ruptured synovium?

Treatment options range from conservative measures like rest and physical therapy to surgical repair, depending on the severity of the rupture.