ICD-10-CM 2027
ICD-10 code for eye and adnexa corrosion
From the official ICD-10-CM alphabetic index entry “Corrosion (injury) (acid) (caustic) (chemical) (lime) (external) (internal) › eye (s) and adnexa”. Page updated September 29, 2026.
About coding eye and adnexa corrosion
The ICD-10-CM code for eye and adnexa corrosion is T26.9 (Corrosion of eye and adnexa, part unspecified). The official index lists 2 more specific codes, so check the documentation for details such as type, cause, site or severity before settling on T26.9.
Within T26, choose T26.9 (Corrosion of eye and adnexa, part unspecified) only when documentation doesn't support a more specific option: burn of eyelid and periocular area (T26.0), burn of cornea and conjunctival sac (T26.1), burn with resulting rupture and destruction of eyeball (T26.2), burns of other specified parts of eye and adnexa (T26.3), burn of eye and adnexa, part unspecified (T26.4), corrosion of eyelid and periocular area (T26.5), corrosion of cornea and conjunctival sac (T26.6), corrosion with resulting rupture and destruction of eyeball (T26.7) and 1 more.
Codes in this range require a 7th character: A for initial encounter, D for subsequent encounter and S for sequela. Use placeholder "X" characters to fill any empty positions before the 7th character.
More specific eye and adnexa corrosion codes (official index)
Common questions about eye and adnexa corrosion ICD-10 codes
What is the ICD-10 code for eye and adnexa corrosion?
- T26.9 — Corrosion of eye and adnexa, part unspecified (a header code; report a more specific subcode). More specific codes apply when the documentation supports them: T26.7, T26.8.
Is T26.9 billable?
- No. T26.9 is a header code. Report one of its more specific subcodes instead.