H40.2231 – Chronic angle-closure glaucoma, bilateral, mild stage

ICD-10-CM 2027 diagnosis code · Glaucoma

Billable code

ICD-10-CM code H40.2231

Code: H40.2231 (claims format: H402231)
Description: Chronic angle-closure glaucoma, bilateral, mild stage
Billable: Yes – valid for HIPAA-covered transactions
Valid for: Dates of service October 1, 2026 – September 30, 2027 (FY2027)
Chapter: 7. Diseases of the eye and adnexa (H00-H59)
Block: H40-H42 Glaucoma
Parent codes: H40 › H40.2 › H40.22 › H40.223

7th character values

Codes in this category need a 7th character to describe the encounter or episode of care.

Character	Meaning
`0`	stage unspecified
`1`	mild stage
`2`	moderate stage
`3`	severe stage
`4`	indeterminate stage

Notes inherited from parent codes

Instructional notes at a category or block level apply to every code below it.

H40 – Glaucoma

Excludes1 (not coded here):

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

H40.2 – Primary angle-closure glaucoma

Excludes1 (not coded here):

aqueous misdirection (H40.83-)
malignant glaucoma (H40.83-)

H40.22 – Chronic angle-closure glaucoma

Applicable to:

Chronic primary angle closure glaucoma

7th character note:

One of the following 7th characters is to be assigned to each code in subcategory H40.22 to designate the stage of glaucoma

Related codes in H40.223

Frequently asked questions

What is ICD-10 code H40.2231?

H40.2231 is the ICD-10-CM code for chronic angle-closure glaucoma, bilateral, mild stage, in the block H40-H42 (Glaucoma).

Is H40.2231 a billable code?

Yes. H40.2231 is a billable/specific code that can be used to indicate a diagnosis for reimbursement purposes.

What category does H40.2231 belong to?

It belongs to category H40 – Glaucoma.

Source: CDC/NCHS ICD-10-CM FY2027 code files, tabular list and index. Reference only – code assignment must follow the official ICD-10-CM guidelines and documentation in the medical record.