Vitreous abscess (chronic), bilateral

This code signifies a chronic purulent inflammation within the vitreous humor of both eyes, characterized by the presence of an abscess. It indicates a long-standing infection or inflammatory process affecting the gel-like substance that fills the posterior segment of the eye. This condition can lead to significant vision impairment if left untreated.

Apply this code when documentation clearly states a diagnosis of a chronic vitreous abscess affecting both eyes. This diagnosis is typically made by an ophthalmologist based on clinical examination, imaging (e.g., B-scan ultrasonography), and possibly vitreous biopsy results. The "chronic" descriptor must be explicitly stated or clearly implied by the duration of symptoms or treatment.

• Ensure the documentation specifies "chronic" and "bilateral" to accurately assign this code.
• Distinguish from acute vitreous abscesses, which would be coded differently.
• Code any underlying cause of the vitreous abscess (e.g., endophthalmitis, penetrating injury) as a primary diagnosis if known and applicable, following sequencing guidelines.