Parasitic cyst of retina, right eye

This code signifies the presence of a cyst within the retina of the right eye that is caused by a parasitic infection. This condition can lead to visual impairment due to retinal damage or detachment.

Use this code when diagnostic imaging (e.g., OCT, ultrasound) or clinical examination confirms a parasitic cyst specifically located in the retina of the right eye. Documentation should clearly state the parasitic etiology and the right eye involvement.

• Ensure the documentation specifies "parasitic" etiology; otherwise, consider codes for non-parasitic retinal cysts.
• Verify laterality; this code is specific to the right eye. Use H33.122 for the left eye or H33.123 for bilateral involvement.
• Code any associated parasitic infection (e.g., toxocariasis, cysticercosis) as a primary or secondary diagnosis, depending on the clinical scenario.