ICD-10-CM > H00-H59 > H40-H42 > H40 > H40.4 > H40.42 H40.42 Glaucoma secondary to eye inflammation, left eye Non-Billable/Non-Specific Codes H40.42X0..., stage unspecifiedH40.42X1..., mild stageH40.42X2..., moderate stageH40.42X3..., severe stageH40.42X4..., indeterminate stage