Primary cyst of pars plana, left eye

This code signifies a congenital or acquired fluid-filled sac located in the pars plana region of the ciliary body in the left eye. These cysts are typically benign and often asymptomatic, though larger cysts can sometimes cause visual disturbances or inflammation.

Apply this code when documentation clearly identifies a primary cyst originating in the pars plana of the left eye. This diagnosis is typically made through ophthalmic examination, often utilizing imaging techniques such as ultrasound biomicroscopy (UBM) or optical coherence tomography (OCT).

• Differentiate from secondary cysts, which may be inflammatory or post-traumatic.
• Ensure laterality is explicitly documented as "left eye" to support this specific code.
• Do not confuse with cysts of the iris or ciliary body not specifically located in the pars plana.