H40 ICD-10-CA category: Glaucoma
H40 isn’t a code on its own. Choose one of the 9 codes beneath it, the one the documentation supports.
Official description
H40Glaucoma
ICD-10-CA · Canada
Codes in H40
H40 isn’t a code on its own. Open the code that matches what the note documents.
Notes for H40
As CIHI prints them, with any note H40 takes from the headings above it.
Excludes
Conditions classified elsewhere.
- Absolute glaucoma (H44.5)congenital glaucoma (Q15.0)traumatic glaucoma due to birth injury (P15.3)
- Certain:• conditions originating in the perinatal period (P00-P96)• infectious and parasitic diseases (A00-B99)complications of pregnancy, childbirth and the puerperium (O00-O99)congenital malformations, deformations and chromosomal abnormalities (Q00-Q99)endocrine, nutritional and metabolic diseases (E00-E90)injury, poisoning and certain other consequences of external causes (S00-T98)neoplasms (C00-D48)symptoms, signs and abnormal clinical and laboratory findings, not elsewhere classified (R00-R99)From Chapter 7: Diseases of the eye and adnexa (H00-H59)
Where H40 sits
- 1ChapterChapter 7: Diseases of the eye and adnexa (H00-H59)
- 2Block H40-H42Glaucoma
- 3Category H40Glaucoma
Source and release
- Data release
- ICD-10-CA · FY 2026–2027
- Effective date
- Apr 1, 2026
- Publisher
- CIHI
This page is built from the ICD-10-CA catalog that Vero Codes reads when it suggests codes: Canadian Institute for Health Information’s FY 2026–2027 release, imported from the publisher’s file and checked against it. The description, notes and structured data come from the same record.
Frequently asked questions
Is H40 a valid ICD-10-CA code?
No. H40 (Glaucoma) is a category heading in CIHI’s ICD-10-CA FY 2026–2027 release. It holds 9 codes; record the one the documentation supports.
Where is H40 in ICD-10-CA?
H40 sits under H40-H42 Glaucoma, within Chapter 7: Diseases of the eye and adnexa (H00-H59).
What coding notes apply to H40?
ICD-10-CA lists Excludes notes for H40, including those from the headings it sits under. They are listed on this page with where each one comes from.
Which ICD-10-CA release does this page use?
It uses CIHI’s FY 2026–2027 release, in effect from Apr 1, 2026 to Mar 31, 2027. It is a reference: confirm the code against the current list and the payer’s rules before you submit it.