ICD-10-CM > H00-H59 > H40-H42 > H40 > H40.1 > H40.12 H40.12 Low-tension glaucoma Non-Billable/Non-Specific Codes H40.121Low-tension glaucoma, right eyeH40.1210..., stage unspecifiedH40.1211..., mild stageH40.1212..., moderate stageH40.1213..., severe stageH40.1214..., indeterminate stageH40.122Low-tension glaucoma, left eyeH40.1220..., stage unspecifiedH40.1221..., mild stageH40.1222..., moderate stageH40.1223..., severe stageH40.1224..., indeterminate stageH40.123Low-tension glaucoma, bilateralH40.1230..., stage unspecifiedH40.1231..., mild stageH40.1232..., moderate stageH40.1233..., severe stageH40.1234..., indeterminate stageH40.129Low-tension glaucoma, unspecified eyeH40.1290..., stage unspecifiedH40.1291..., mild stageH40.1292..., moderate stageH40.1293..., severe stageH40.1294..., indeterminate stage