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ICD-10 Guide
ICD-10 CodesM66.174

M66.174

Billable

Rupture of synovium, right foot

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

Code Description

ICD-10 M66.174 is a billable code used to indicate a diagnosis of rupture of synovium, right foot.

Key Diagnostic Point:

Rupture of the synovium in the right foot refers to the tearing or disruption of the synovial membrane, which is a thin layer of tissue that lines the joints and tendon sheaths. This condition can occur due to trauma, repetitive stress, or underlying inflammatory conditions such as rheumatoid arthritis or gout. 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 foot. Patients may present with symptoms such as localized tenderness, warmth, and swelling around the joint or tendon sheath. Diagnosis typically involves a thorough clinical examination, imaging studies like ultrasound or MRI, and sometimes aspiration of joint fluid for analysis. Treatment may include conservative measures such as rest, ice, compression, and elevation (RICE), as well as corticosteroid injections or surgical intervention if conservative management fails. Surgical options may involve synovectomy or repair of the ruptured synovium, depending on the severity of the rupture and associated conditions.

Code Complexity Analysis

Complexity Rating: Medium

Medium Complexity

Complexity Factors

  • Differentiating between types of synovial disorders
  • Understanding the relationship between synovial rupture and underlying conditions
  • Identifying appropriate imaging studies for diagnosis
  • Determining the necessity of surgical intervention

Audit Risk Factors

  • Inadequate documentation of the mechanism of injury
  • Failure to specify the exact location of the rupture
  • Lack of imaging results in the medical record
  • Improper coding of associated conditions

Specialty Focus

Medical Specialties

Orthopedics

Documentation Requirements

Detailed operative reports, imaging studies, and follow-up notes are essential for accurate coding.

Common Clinical Scenarios

Patients presenting with acute foot pain following trauma or chronic pain due to repetitive stress injuries.

Billing Considerations

Orthopedic surgeons must document the extent of the rupture and any associated tendon injuries for proper coding.

Rheumatology

Documentation Requirements

Comprehensive patient history, including previous inflammatory conditions and treatment responses.

Common Clinical Scenarios

Patients with rheumatoid arthritis experiencing exacerbations leading to synovial rupture.

Billing Considerations

Rheumatologists should document the relationship between systemic disease and local joint pathology.

Coding Guidelines

Inclusion Criteria

Use M66.174 When
  • According to ICD
  • 10 coding guidelines, M66
  • 174 should be used when there is a confirmed diagnosis of synovial rupture in the right foot
  • Coders must ensure that the documentation supports the diagnosis and any associated procedures performed

Exclusion Criteria

Do NOT use M66.174 When
No specific exclusions found.

Related ICD-10 Codes

Related CPT Codes

27301CPT Code

Arthroscopy, knee, diagnostic, with or without synovial biopsy

Clinical Scenario

Used when a patient with a ruptured synovium undergoes arthroscopic evaluation.

Documentation Requirements

Operative report detailing the procedure and findings.

Specialty Considerations

Orthopedic surgeons must document the rationale for the procedure.

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 patient records and facilitating better treatment planning.

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 patient records and facilitating better treatment planning.

Reimbursement & Billing Impact

The transition to ICD-10 has allowed for more specific coding of conditions like synovial rupture, improving the accuracy of patient records and facilitating better treatment planning.

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.

How is a synovial rupture diagnosed?

Diagnosis typically involves a clinical examination, imaging studies like MRI or ultrasound, and sometimes aspiration of joint fluid.