ICD-10-CM > H00-H59 > H40-H42 > H40 > H40.5 > H40.50 H40.50 Glaucoma secondary to other eye disorders, unspecified eye Non-Billable/Non-Specific Codes H40.50X0..., stage unspecifiedH40.50X1..., mild stageH40.50X2..., moderate stageH40.50X3..., severe stageH40.50X4..., indeterminate stage