Idiopathic aseptic necrosis of right shoulder

This code signifies the death of bone tissue in the right shoulder joint due to a lack of blood supply, without an identifiable cause such as trauma or infection. This condition, also known as avascular necrosis or osteonecrosis, leads to bone collapse and subsequent arthritis if untreated.

Apply this code when documentation explicitly states idiopathic aseptic necrosis affecting the right shoulder. Supporting clinical notes should detail diagnostic findings such as MRI or X-ray evidence of bone infarction in the humeral head or glenoid, in the absence of trauma, steroid use, or other known etiologies.

• Ensure documentation specifies "idiopathic" or "aseptic" to differentiate from necrosis due to trauma or other secondary causes.
• Verify the laterality is clearly documented as "right shoulder" to avoid miscoding.
• Do not confuse with osteochondrosis, which involves growth plate disturbances rather than bone death.