Primary iridocyclitis, left eye

This code signifies inflammation of both the iris and ciliary body, originating without an identifiable external cause or systemic disease, specifically affecting the patient's left eye. It represents a form of anterior uveitis where the primary etiology is unknown or idiopathic.

Apply this code when documentation clearly indicates a diagnosis of primary iridocyclitis in the left eye. This diagnosis is typically made after ruling out infectious, traumatic, or systemic causes for the inflammation. Supporting documentation would include ophthalmologist notes detailing the examination findings, such as ciliary flush, keratic precipitates, and cells/flare in the anterior chamber, along with the absence of a secondary cause.

• Ensure the documentation specifies "primary" or "idiopathic" to differentiate from secondary forms of iridocyclitis.
• Verify the laterality is explicitly stated as "left eye" to avoid incorrect coding.
• Do not use this code if a specific underlying cause (e.g., infection, trauma, autoimmune disease) for the iridocyclitis is identified; instead, code the specific cause and the appropriate secondary iridocyclitis code.