T26.90XA ICD-10-CM Code: Corrosion of unspecified eye and adnexa, part unspecified, initial encounter
Billing Status: YES. This is a valid, specific, and billable ICD-10-CM reference.
Inpatient Payment Groups (MS-DRG)
MS-DRGs this diagnosis helps define, as principal or secondary, per the CMS ICD-10-CM/PCS MS-DRG Definitions Manual v43.0 (FY2026), Appendix B.
- MS-DRG 124 — OTHER DISORDERS OF THE EYE WITH MCC OR THROMBOLYTIC AGENT (MDC 02)
- MS-DRG 125 — OTHER DISORDERS OF THE EYE WITHOUT MCC (MDC 02)
A diagnosis appearing in a group's logic does not by itself determine the DRG assigned to a stay; the grouper uses the full claim.
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 T26.90XA 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
Does T26.90XA 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 T26.90XA in its code family, with their registry titles.
- T26.82XA — Corrosions of other specified parts of left eye and adnexa, initial encounter
- T26.82XD — Corrosions of other specified parts of left eye and adnexa, subsequent encounter
- T26.82XS — Corrosions of other specified parts of left eye and adnexa, sequela
- T26.9 — Corrosion of eye and adnexa, part unspecified
- T26.90 — Corrosion of unspecified eye and adnexa, part unspecified
- T26.90XD — Corrosion of unspecified eye and adnexa, part unspecified, subsequent encounter
- T26.90XS — Corrosion of unspecified eye and adnexa, part unspecified, sequela
- T26.91 — Corrosion of right eye and adnexa, part unspecified
- T26.91XA — Corrosion of right eye and adnexa, part unspecified, initial encounter
- T26.91XD — Corrosion of right eye and adnexa, part unspecified, subsequent encounter