ICD Code M25.462

ICD code M25.462 is effusion of the left knee, meaning there is an abnormal accumulation of fluid in the left knee joint.

1. Presence of swelling in the left knee joint

2. Observable or palpable fluid accumulation within the left knee

3. Patient reports pain, stiffness, or restricted range of motion in the left knee

4. Clinical examination confirms joint effusion (e.g., positive bulge sign or patellar tap test)

5. Imaging studies (such as ultrasound or MRI) demonstrate excess fluid in the left knee joint

6. Effusion is not attributable to acute trauma, infection, or systemic inflammatory disease unless specified

7. Symptoms persist beyond transient or minor fluid accumulation

Relevant CPT codes for ICD-10 code M25.462 include:

- 20610: Arthrocentesis, aspiration and/or injection; major joint or bursa (e.g., knee, shoulder, hip, subacromial bursa)

- 27369: Injection procedure for contrast knee arthrography or air/contrast injection for arthrography, any method

- 29870: Arthroscopy, knee, diagnostic, with or without synovial biopsy (separate procedure)

- 29871: Arthroscopy, knee, surgical; for infection, lavage and drainage

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