H40.1121

H40.1121: Primary open-angle glaucoma, left eye, mild stage

Billable / specific codeICD-10-CMleft

H40.1121 is a billable, specific ICD-10-CM code for primary open-angle glaucoma, left eye, mild stage. It is valid for submission on a claim.

Check H40.1121 with the rest of the claim: free scrubber

7th character "1": mild stage

One of the following 7th characters is to be assigned to each code in subcategory H40.11 to designate the stage of glaucoma

0: stage unspecified
1: mild stage
2: moderate stage
3: severe stage
4: indeterminate stage

Excludes1 inherited from the categories above H40.1121

A category’s note binds every code beneath it.

Written on H40: Glaucoma

absolute glaucoma (H44.51-)
congenital glaucoma (Q15.0)
traumatic glaucoma due to birth injury (P15.3)

Risk adjustment

No CMS-HCC V28 category: this code does not change a RAF score.

Medicare coverage

H40.1121 is named in 33 Medicare coverage policies: 33 listing it as supporting medical necessity. Which one applies depends on your Medicare contractor.

A52432Billing and Coding: Insertion of anterior segment aqueous drainage device, without extraocular reservoir, external approach (0192T 66183)
A53060Billing and Coding: Ophthalmology: Extended Ophthalmoscopy and Fundus Photography
A55639Billing and Coding: Chemotherapy Agents for Non-Oncologic Conditions
A56457Billing and Coding: Corneal Pachymetry

Code history

Unchanged in every release from FY2024 to FY2027.