Exudative cyst of pars plana, unspecified eye

This code describes an exudative cyst located on the pars plana of the eye, where the specific eye (right or left) is not documented. An exudative cyst is a fluid-filled sac, and its presence on the pars plana can indicate inflammation or other underlying ocular pathology.

Use this code when documentation clearly identifies an exudative cyst of the pars plana but does not specify laterality. This typically occurs when the physician notes the presence of the cyst without indicating if it's in the right, left, or both eyes.

• Ensure the documentation explicitly states "pars plana" and "exudative cyst."
• If laterality is specified (e.g., right eye, left eye, bilateral), use the more specific code (H21.351, H21.352, H21.353).
• Do not confuse with other types of pars plana cysts (e.g., degenerative) or cysts in other ocular structures.