T21.04XS — Burn of unspecified degree of lower back, sequela

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 604 — TRAUMA TO THE SKIN, SUBCUTANEOUS TISSUE AND BREAST WITH MCC (MDC 09)
MS-DRG 605 — TRAUMA TO THE SKIN, SUBCUTANEOUS TISSUE AND BREAST WITHOUT MCC (MDC 09)

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.

Burn of unspecified degree of lower back, sequela is a billable ICD-10-CM diagnosis code (T21.04S).

Sequencing, inclusion, and exclusion notes published for T21.04XS in the official ICD-10-CM tabular list.

Conditions the official ICD-10-CM tabular list includes under this code.

burns and corrosion of hip region
burns and corrosions of first degree [erythema]
burns and corrosions of second degree [blisters][epidermal loss]
burns and corrosions of third degree [deep necrosis of underlying tissue] [full- thickness skin loss]

Conditions not covered by this code, but which may be reported alongside it when both are present.

Supplementary codes the tabular list directs you to add.

external cause code to identify the source, place and intent of the burn (X00-X19, X75-X77, X96-X98, Y92)
Use additional code from category T31 or T32 to identify extent of body surface involved

Yes. The appropriate 7th character is to be added to each code from category T21.

Official ICD-10-CM classifications closest to T21.04XS in its code family, with their registry titles.