ICD-10-CM > H00-H59 > H40-H42 > H40 > H40.1 > H40.12 > H40.123 H40.123 Low-tension glaucoma, bilateral Non-Billable/Non-Specific Codes H40.1230..., stage unspecifiedH40.1231..., mild stageH40.1232..., moderate stageH40.1233..., severe stageH40.1234..., indeterminate stage