ICD-10-CM > H00-H59 > H40-H42 > H40 > H40.1 > H40.12 > H40.129 H40.129 Low-tension glaucoma, unspecified eye Non-Billable/Non-Specific Codes H40.1290..., stage unspecifiedH40.1291..., mild stageH40.1292..., moderate stageH40.1293..., severe stageH40.1294..., indeterminate stage