T28.40 is the authoritative medical code for Burn of unspecified internal organ. This classification is used in medical billing and clinical recording to specify the clinical criteria for burn of unspecified internal organ (ICD-10-CM T28.40), ensuring healthcare documentation aligns with 2026 federal coding standards.
Billing Status: NO. This is a clinician non-billable / parent hierarchy grouping in the ICD-10-CM system.
Official Registry Overview & Definition
Burn of unspecified internal organ is a non-billable ICD-10-CM category code T28.40. A more specific billable subcode must be selected for claims submission. Use additional code: 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. 7th character: The appropriate 7th character is to be added to each code from category T28.
Official Tabular Instructional Notes
Sequencing, inclusion, and exclusion notes published for T28.40 in the official ICD-10-CM tabular list.
Use Additional 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
Frequently Asked Questions (FAQ) & Clinical Guidance
Can T28.40 be billed directly?
No. T28.40 (Burn of unspecified internal organ) is a non-billable ICD-10-CM category code. A more specific billable subcode must be selected based on clinical documentation.
Does T28.40 require a 7th character?
Yes. The appropriate 7th character is to be added to each code from category T28.
Is an additional code needed with T28.40?
Use additional code(s) to specify: 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).
Codes in This Family (40)
Official ICD-10-CM classifications in the same code family as T28.40, with their registry titles.
- T28 — Burn and corrosion of other internal organs
- T28.0 — Burn of mouth and pharynx
- T28.0XXA — Burn of mouth and pharynx, initial encounter
- T28.0XXD — Burn of mouth and pharynx, subsequent encounter
- T28.0XXS — Burn of mouth and pharynx, sequela
- T28.1 — Burn of esophagus
- T28.1XXA — Burn of esophagus, initial encounter
- T28.1XXD — Burn of esophagus, subsequent encounter
- T28.1XXS — Burn of esophagus, sequela
- T28.2 — Burn of other parts of alimentary tract
- T28.2XXA — Burn of other parts of alimentary tract, initial encounter
- T28.2XXD — Burn of other parts of alimentary tract, subsequent encounter
- T28.2XXS — Burn of other parts of alimentary tract, sequela
- T28.3 — Burn of internal genitourinary organs
- T28.3XXA — Burn of internal genitourinary organs, initial encounter
- T28.3XXD — Burn of internal genitourinary organs, subsequent encounter
- T28.3XXS — Burn of internal genitourinary organs, sequela
- T28.4 — Burns of other and unspecified internal organs
- T28.40XA — Burn of unspecified internal organ, initial encounter
- T28.40XD — Burn of unspecified internal organ, subsequent encounter
- T28.40XS — Burn of unspecified internal organ, sequela
- T28.41 — Burn of ear drum
- T28.411 — Burn of right ear drum
- T28.411A — Burn of right ear drum, initial encounter
- T28.411D — Burn of right ear drum, subsequent encounter
- T28.411S — Burn of right ear drum, sequela
- T28.412 — Burn of left ear drum
- T28.412A — Burn of left ear drum, initial encounter
- T28.412D — Burn of left ear drum, subsequent encounter
- T28.412S — Burn of left ear drum, sequela
- T28.419 — Burn of unspecified ear drum
- T28.419A — Burn of unspecified ear drum, initial encounter
- T28.419D — Burn of unspecified ear drum, subsequent encounter
- T28.419S — Burn of unspecified ear drum, sequela
- T28.49 — Burn of other internal organ
- T28.49XA — Burn of other internal organ, initial encounter
- T28.49XD — Burn of other internal organ, subsequent encounter
- T28.49XS — Burn of other internal organ, sequela
- T28.5 — Corrosion of mouth and pharynx
- T28.5XXA — Corrosion of mouth and pharynx, initial encounter
Indexed Clinical Terms (1)
Clinical term phrases from the official ICD-10-CM Index to Diseases and Injuries that map to this code.
- Burn (electricity) (flame) (hot gas, liquid or hot object) (radiation) (steam) (thermal), internal organ (s)
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:
ICD Code T24.40
Corrosion of unspecified degree of unspecified site of lower limb, except ankle and foot
ICD Code T31.40
Burns involving 40-49% of body surface with 0% to 9% third degree burns
ICD Code T32.40
Corrosions involving 40-49% of body surface with 0% to 9% third degree corrosion