T27.4XXD ICD-10 Code: Corrosion of larynx and trachea, subsequent 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.

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.

Corrosion of larynx and trachea, subsequent encounter is a billable ICD-10-CM diagnosis code (T27.4D).

Sequencing, inclusion, and exclusion notes published for T27.4XXD in the official ICD-10-CM tabular list.

Underlying conditions that must be sequenced before this code.

Supplementary codes the tabular list directs you to add.

external cause code to identify the source and intent of the burn (X00-X19, X75-X77, X96-X98)
external cause code to identify place (Y92)

Yes. The appropriate 7th character is to be added to each code from category T27.

Official ICD-10-CM classifications closest to T27.4XXD in its code family, with their registry titles.

T27.3XXA — Burn of respiratory tract, part unspecified, initial encounter
T27.3XXD — Burn of respiratory tract, part unspecified, subsequent encounter
T27.3XXS — Burn of respiratory tract, part unspecified, sequela
T27.4 — Corrosion of larynx and trachea
T27.4XXA — Corrosion of larynx and trachea, initial encounter
T27.4XXS — Corrosion of larynx and trachea, sequela
T27.5 — Corrosion involving larynx and trachea with lung
T27.5XXA — Corrosion involving larynx and trachea with lung, initial encounter
T27.5XXD — Corrosion involving larynx and trachea with lung, subsequent encounter
T27.5XXS — Corrosion involving larynx and trachea with lung, sequela