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ICD-10 Guide
ICD-10 CodesM67.362

M67.362

Billable

Transient synovitis, left knee

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

Code Description

ICD-10 M67.362 is a billable code used to indicate a diagnosis of transient synovitis, left knee.

Key Diagnostic Point:

Transient synovitis of the left knee is a benign inflammatory condition characterized by the temporary inflammation of the synovial membrane, which lines the knee joint. This condition is most commonly seen in children and adolescents, often presenting with acute knee pain, swelling, and limited range of motion. The etiology is frequently idiopathic, but it can also be associated with recent viral infections or trauma. Diagnosis is primarily clinical, supported by imaging studies such as ultrasound or MRI, which may reveal joint effusion and synovial thickening. Treatment typically involves rest, nonsteroidal anti-inflammatory drugs (NSAIDs), and in some cases, aspiration of the joint. The prognosis is generally favorable, with most patients experiencing complete resolution of symptoms within a few weeks. However, it is crucial to differentiate transient synovitis from more serious conditions such as septic arthritis or osteomyelitis, which require more aggressive intervention.

Code Complexity Analysis

Complexity Rating: Medium

Medium Complexity

Complexity Factors

  • Differentiation from septic arthritis and other joint disorders
  • Need for accurate documentation of clinical findings
  • Potential for misdiagnosis leading to incorrect coding
  • Variability in presentation and treatment protocols

Audit Risk Factors

  • Inadequate documentation of clinical findings
  • Failure to document imaging results
  • Misclassification of the condition as chronic
  • Lack of follow-up documentation

Specialty Focus

Medical Specialties

Pediatrics

Documentation Requirements

Detailed history of present illness, physical examination findings, and any imaging studies performed.

Common Clinical Scenarios

Acute knee pain in a child following a viral illness or minor trauma.

Billing Considerations

Ensure to document the duration of symptoms and any response to initial treatment.

Orthopedics

Documentation Requirements

Comprehensive assessment including range of motion, joint stability, and any surgical interventions if applicable.

Common Clinical Scenarios

Evaluation of knee pain with suspected transient synovitis versus other orthopedic conditions.

Billing Considerations

Document any differential diagnoses considered and rationale for treatment decisions.

Coding Guidelines

Inclusion Criteria

Use M67.362 When
  • Follow ICD
  • CM guidelines for coding synovial disorders
  • Ensure that the code reflects the specific joint affected and that documentation supports the diagnosis

Exclusion Criteria

Do NOT use M67.362 When
  • Exclude codes for chronic conditions unless specified

Related ICD-10 Codes

Related CPT Codes

20610CPT Code

Arthrocentesis, aspiration and/or injection into a major joint or bursa

Clinical Scenario

Used when joint effusion is present and aspiration is performed.

Documentation Requirements

Document indication for aspiration, findings, and volume of fluid removed.

Specialty Considerations

Orthopedic specialists should ensure proper coding based on the procedure performed.

ICD-10 Impact

Diagnostic & Documentation Impact

Enhanced Specificity

ICD-10 Improvements

The transition to ICD-10 has allowed for more specific coding of transient synovitis, improving the accuracy of data collection and reimbursement processes. This specificity aids in better tracking of the condition's prevalence and treatment outcomes.

ICD-9 vs ICD-10

The transition to ICD-10 has allowed for more specific coding of transient synovitis, improving the accuracy of data collection and reimbursement processes. This specificity aids in better tracking of the condition's prevalence and treatment outcomes.

Reimbursement & Billing Impact

reimbursement processes. This specificity aids in better tracking of the condition's prevalence and treatment outcomes.

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 treatment for transient synovitis?

The primary treatment includes rest, NSAIDs for pain relief, and sometimes aspiration of the joint if effusion is significant.

How can transient synovitis be differentiated from septic arthritis?

Transient synovitis typically presents with normal laboratory findings, while septic arthritis shows elevated inflammatory markers and may require joint aspiration for culture.