ICD-10 Code H59.42 – Inflammation (infection) of postprocedural bleb, stage 2 (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code H59.42 – Inflammation (infection) of postprocedural bleb, stage 2
What it is
H59.42 identifies inflammation or infection affecting a postprocedural bleb, with documentation specifying stage 2. Use it when the bleb complication is clearly linked to a prior procedure and the stage is recorded.
Clinical signs
Typical findings may include conjunctival redness, localized tenderness, swelling, or drainage around the bleb. Clinical features vary; refer to documentation for the exact stage and whether infection is confirmed.
When to use this code
Use this code when the provider documents an infected or inflamed postprocedural bleb and specifies stage 2. It is appropriate in postoperative ophthalmic follow-up notes, consultation reports, or problem lists that clearly identify the bleb complication.
If the record only mentions a bleb problem without infection, inflammation, or stage detail, check documentation before coding. Make sure the condition is described as postprocedural rather than a different ocular disorder.
Do not use for
Do not use this code for a bleb complication without documented inflammation or infection. Also avoid it when the stage is not recorded and you cannot verify stage 2 from the chart.
Coding tip
Confirm both the postprocedural bleb complication and the documented stage before assigning H59.42.