T21.01XA ICD-10-CM Code: Burn of unspecified degree of chest wall, 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 935 — NON-EXTENSIVE BURNS (MDC 22)
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 T21.01XA in the official ICD-10-CM tabular list.
Includes
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]
Inclusion Terms
Alternative terms the tabular list files under this code.
- Burn of unspecified degree of breast
Excludes2 — Not Included Here
Conditions not covered by this code, but which may be reported alongside it when both are present.
- burns and corrosion of axilla (T22.- with fifth character 4)
- burns and corrosion of scapular region (T22.- with fifth character 6)
- burns and corrosion of shoulder (T22.- with fifth character 5)
Use Additional Code
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
Frequently Asked Questions (FAQ) & Clinical Guidance
Does T21.01XA require a 7th character?
Yes. The appropriate 7th character is to be added to each code from category T21.
Nearest Codes in This Family
Official ICD-10-CM classifications closest to T21.01XA in its code family, with their registry titles.
- T21.00 — Burn of unspecified degree of trunk, unspecified site
- T21.00XA — Burn of unspecified degree of trunk, unspecified site, initial encounter
- T21.00XD — Burn of unspecified degree of trunk, unspecified site, subsequent encounter
- T21.00XS — Burn of unspecified degree of trunk, unspecified site, sequela
- T21.01 — Burn of unspecified degree of chest wall
- T21.01XD — Burn of unspecified degree of chest wall, subsequent encounter
- T21.01XS — Burn of unspecified degree of chest wall, sequela
- T21.02 — Burn of unspecified degree of abdominal wall
- T21.02XA — Burn of unspecified degree of abdominal wall, initial encounter
- T21.02XD — Burn of unspecified degree of abdominal wall, subsequent encounter