T21.05XA ICD-10-CM Code: Burn of unspecified degree of buttock, initial encounter
T21.05XA is the authoritative medical code for Burn of unspecified degree of buttock, initial encounter. This classification is used in medical billing and clinical recording to specify the clinical criteria for burn of unspecified degree of buttock, initial encounter (ICD-10-CM T21.05XA), ensuring healthcare documentation aligns with current federal coding standards.
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 T21.05XA 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 anus
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 T21.05XA require a 7th character?
Yes. The appropriate 7th character is to be added to each code from category T21.
Can T21.05XA be reported alongside related conditions?
Per official ICD-10-CM Excludes2 instructions, T21.05XA and the following are not considered part of each other and may both be reported when both conditions 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).
Is an additional code needed with T21.05XA?
Use additional code(s) to specify: external cause code to identify the source, place and intent of the burn (X00-X19, X75-X77, X96-X98, Y92); code from category T31 or T32 to identify extent of body surface involved.
What conditions are included under T21.05XA?
Burn of unspecified degree of buttock, initial encounter includes: Burn of unspecified degree of anus.
Nearest Codes in This Family
Official ICD-10-CM classifications closest to T21.05XA in its code family, with their registry titles.
- T21.04 — Burn of unspecified degree of lower back
- T21.04XA — Burn of unspecified degree of lower back, initial encounter
- T21.04XD — Burn of unspecified degree of lower back, subsequent encounter
- T21.04XS — Burn of unspecified degree of lower back, sequela
- T21.05 — Burn of unspecified degree of buttock
- T21.05XD — Burn of unspecified degree of buttock, subsequent encounter
- T21.05XS — Burn of unspecified degree of buttock, sequela
- T21.06 — Burn of unspecified degree of male genital region
- T21.06XA — Burn of unspecified degree of male genital region, initial encounter
- T21.06XD — Burn of unspecified degree of male genital region, subsequent encounter