ICD-10-CM > H00-H59 > H40-H42 > H40 > H40.5 > H40.52 H40.52 Glaucoma secondary to other eye disorders, left eye Non-Billable/Non-Specific Codes H40.52X0..., stage unspecifiedH40.52X1..., mild stageH40.52X2..., moderate stageH40.52X3..., severe stageH40.52X4..., indeterminate stage