T26.5 Corrosion of eyelid and periocular area

The ICD-10-CM code for Corrosion of eyelid and periocular area is T26.5 (FY2026). It is a non-billable category code — select a more specific code below for claims.

Classification

Chapter

19: Injury, poisoning and certain other consequences of external causes (S00-T88)

Section

T26-T28: Burns and corrosions confined to eye and internal organs (T26-T28)

Category T26

41 codes (30 billable)

FY2026 Status

Stable since FY2024

Also Known As

ICD-10-CM Alphabetic Index entries that lead to T26.5:

• Corrosion (injury) (acid) (caustic) (chemical) (lime) (external) (internal) › eyelid (s)

Official Coding Guidelines

Burn degree classification; T26-T28 site-only (not degree)

Burns are classified by depth as first degree (erythema), second degree (blistering), and third degree (full-thickness involvement). Burns of the eye and internal organs (T26-T28) are classified by site, but not by degree.

Sequence blood vessel/nerve injury first (fragment)

injury is to the blood vessels or nerves, that injury should be sequenced first.

Source: CMS — ICD-10-CM Official Guidelines for Coding and Reporting, FY2026

References

• CMS — ICD-10-CM Official Code Set and Guidelines, FY2026
• CDC/NCHS — ICD-10-CM Files and Browser Tool