What ICD-10 codes can be used for glaucoma?
There are a lot of ICD-10 codes that you can use for glaucoma-related cases. Here are six among many that you can use:
- H40.003
- This ICD-10 code stands for Preglaucoma, unspecified, bilateral. This is meant to be used on patients who have exhibited enough symptoms to show early signs of getting glaucoma. They don’t have glaucoma per se, but whatever signs were spotted during examinations point toward the patient developing one for both eyes, hence the bilateral.
- The unspecified in this context is that the type of glaucoma they have isn’t clear yet.
- H40.009
- This ICD-10 code stands for Preglaucoma, unspecified, unspecified eye. This is exactly the same as the previous ICD-10 code. The particular glaucoma is not specified, meaning it isn’t known right now. The only difference is that whatever testing has been done hasn’t properly identified which eye the patient is at risk of developing glaucoma.
- H40.10X0
- This ICD-10 code stands for Unspecified open-angle glaucoma, stage unspecified. This means that the patient is confirmed to have open-angle glaucoma, but two things are unclear: 1) what specific type of open-angle glaucoma the patient has, and 2) what stage the open-angle glaucoma is in (severity). This should only be used when both are unclear.
- H40.1230
- This ICD-10 code stands for Low-tension glaucoma, bilateral, stage unspecified. This means the patient that this code is being used for is confirmed to have low-tension glaucoma in both of their eyes hence bilateral. The only thing that isn’t clear is what stage the low-tension glaucoma is.
- H40.1330
- This ICD-10 code stands for Pigmentary glaucoma, bilateral, stage unspecified. This code is used when the patient is confirmed to have pigmentary glaucoma in both eyes. Like with the previous codes, the stage of the pigmentary glaucoma isn’t known, but once the severity is confirmed, a more specific ICD-10 code that mentions the severity should be used.
- H40.823
- This ICD-10 code stands for Hypersecretion glaucoma, bilateral. This code is used once the patient is confirmed to have a hypersecretion type of glaucoma in both eyes, and the specific stage of the glaucoma hasn’t been determined.

