T26.91 ICD-10-CM Code: Corrosion of right eye and adnexa, part unspecified
Billing Status: NO. This is a clinician non-billable / parent hierarchy grouping in the ICD-10-CM system.
Code Set: Valid FY2026 and FY2027. FY2026 took effect October 1, 2025.
Official Registry Overview & Definition
Official Tabular Instructional Notes
Sequencing, inclusion, and exclusion notes published for T26.91 in the official ICD-10-CM tabular list.
Code First
Underlying conditions that must be sequenced before this code.
- (T51-T65) to identify chemical and intent
Use Additional Code
Supplementary codes the tabular list directs you to add.
- external cause code to identify place (Y92)
Frequently Asked Questions (FAQ) & Clinical Guidance
Can T26.91 be billed directly?
No. T26.91 (Corrosion of right eye and adnexa, part unspecified) is a non-billable ICD-10-CM category code. A more specific billable subcode must be selected based on clinical documentation.
Does T26.91 require a 7th character?
Yes. The appropriate 7th character is to be added to each code from category T26.
Nearest Codes in This Family
Official ICD-10-CM classifications closest to T26.91 in its code family, with their registry titles.
- T26.9 — Corrosion of eye and adnexa, part unspecified
- T26.90 — Corrosion of unspecified eye and adnexa, part unspecified
- T26.90XA — Corrosion of unspecified eye and adnexa, part unspecified, initial encounter
- T26.90XD — Corrosion of unspecified eye and adnexa, part unspecified, subsequent encounter
- T26.90XS — Corrosion of unspecified eye and adnexa, part unspecified, sequela
- T26.91XA — Corrosion of right eye and adnexa, part unspecified, initial encounter
- T26.91XD — Corrosion of right eye and adnexa, part unspecified, subsequent encounter
- T26.91XS — Corrosion of right eye and adnexa, part unspecified, sequela
- T26.92 — Corrosion of left eye and adnexa, part unspecified
- T26.92XA — Corrosion of left eye and adnexa, part unspecified, initial encounter