ICD-10-CM > H00-H59 > H40-H42 > H40 > H40.1 > H40.11 > H40.119 H40.119 Primary open-angle glaucoma, unspecified eye Non-Billable/Non-Specific Codes H40.1190..., stage unspecifiedH40.1191..., mild stageH40.1192..., moderate stageH40.1193..., severe stageH40.1194..., indeterminate stage