T21.04XA is the authoritative medical code for Burn of unspecified degree of lower back, initial encounter. This classification is used in medical billing and clinical recording to specify the clinical criteria for burn of unspecified degree of lower back, initial encounter (ICD-10-CM T21.04XA), ensuring healthcare documentation aligns with 2026 federal coding standards.
Billing Status: YES. This is a valid, specific, and billable ICD-10-CM reference.
Official Registry Overview & Definition
Burn of unspecified degree of lower back, initial encounter is a billable ICD-10-CM diagnosis code T21.04A. Includes: burns and corrosion of hip region; burns and corrosions of first degree erythema; burns and corrosions of second degree blistersepidermal loss; burns and corrosions of third degree deep necrosis of underlying tissue full- thickness skin loss. Excludes2 (not included here): 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: 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. 7th character: The appropriate 7th character is to be added to each code from category T21.
Official Tabular Instructional Notes
Sequencing, inclusion, and exclusion notes published for T21.04XA 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 blistersepidermal loss
- burns and corrosions of third degree deep necrosis of underlying tissue full- thickness skin loss
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)
- code from category T31 or T32 to identify extent of body surface involved
Frequently Asked Questions (FAQ) & Clinical Guidance
Does T21.04XA require a 7th character?
Yes. The appropriate 7th character is to be added to each code from category T21.
Can T21.04XA be reported alongside related conditions?
Per Excludes2 instructions, T21.04XA and the following may both be reported 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).
Is an additional code needed with T21.04XA?
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.
Codes in This Family (3)
Official ICD-10-CM classifications in the same code family as T21.04XA, with their registry titles.
- T21 — Burn and corrosion of trunk
- T21.0 — Burn of unspecified degree of trunk
- T21.1 — Burn of first degree of trunk
Related Codes & Numerical Sequence (Crawl Map)
Search engines and indexers are advised to traverse adjacent medical codes in this sub-chapter range to find correlated diagnoses or therapeutic procedures: