Trachoma, initial stage

This code signifies the earliest phase of trachoma, a chronic infectious eye disease caused by Chlamydia trachomatis. It is characterized by conjunctival inflammation, typically presenting with follicular hypertrophy on the upper tarsal conjunctiva. If left untreated, this initial stage can progress to more severe forms of the disease, leading to scarring and potential blindness.

Assign this code when documentation clearly indicates the presence of trachoma in its initial, inflammatory stage, often referred to as Trachomatous Inflammation—Follicular (TF) according to the WHO grading system. This code is appropriate when the patient presents with early signs and symptoms such as conjunctival follicles and inflammation, without evidence of scarring or trichiasis. Supporting documentation would include ophthalmological examination findings detailing the characteristic follicular changes.

• Ensure documentation specifies "initial stage" or equivalent early inflammatory findings to differentiate from later stages of trachoma.
• Do not use this code if there is evidence of conjunctival scarring (e.g., Arlt's line) or trichiasis, as these indicate more advanced stages.
• Consider co-coding with an appropriate infectious agent code (e.g., Chlamydia trachomatis) if confirmed by laboratory findings.