ICD-10-CM 2027
ICD-10 code for secondary to glaucoma
From the official ICD-10-CM alphabetic index entry “Glaucoma › secondary (to)”. Page updated September 29, 2026.
About coding secondary to glaucoma
The ICD-10-CM code for secondary to glaucoma is H40.5 (Glaucoma secondary to other eye disorders). The official index lists 3 more specific codes, so check the documentation for details such as type, cause, site or severity before settling on H40.5.
Within H40, choose H40.5 (secondary to other eye disorders) only when documentation doesn't support a more specific option: suspect (H40.0), open-angle glaucoma (H40.1), primary angle-closure glaucoma (H40.2), secondary to eye trauma (H40.3), secondary to eye inflammation (H40.4), secondary to drugs (H40.6), other glaucoma (H40.8) and unspecified glaucoma (H40.9).
Codes in this range require a 7th character: 0 for stage unspecified, 1 for mild stage, 2 for moderate stage, 3 for severe stage and 4 for indeterminate stage. Use placeholder "X" characters to fill any empty positions before the 7th character.
It has been part of ICD-10-CM since the code set took effect on October 1, 2015 and hasn't changed since.
More specific secondary to glaucoma codes (official index)
Common questions about secondary to glaucoma ICD-10 codes
What is the ICD-10 code for secondary to glaucoma?
- H40.5 — Glaucoma secondary to other eye disorders (a header code; report a more specific subcode). More specific codes apply when the documentation supports them: H40.6, H40.4, H40.3.
What is the ICD-10 code for drugs secondary to glaucoma?
- H40.6 — Glaucoma secondary to drugs (header code; choose a more specific subcode).
What is the ICD-10 code for inflammation secondary to glaucoma?
- H40.4 — Glaucoma secondary to eye inflammation (header code; choose a more specific subcode).
What is the ICD-10 code for trauma secondary to glaucoma?
- H40.3 — Glaucoma secondary to eye trauma (header code; choose a more specific subcode).
Is H40.5 billable?
- No. H40.5 is a header code. Report one of its more specific subcodes instead.