ICD-10-CM > H00-H59 > H40-H42 > H40 > H40.5 > H40.51 H40.51 Glaucoma secondary to other eye disorders, right eye Non-Billable/Non-Specific Codes H40.51X0..., stage unspecifiedH40.51X1..., mild stageH40.51X2..., moderate stageH40.51X3..., severe stageH40.51X4..., indeterminate stage