T28.4
Burns of other and unspecified internal organs
Not billable — category only FY2026 2025-10-01 → 2026-09-30
This is the unspecified option. 9 more
specific codes sit alongside it. Worth
checking whether the documentation supports one of them.
Exclusions 2 never code together
7th character 3
A initial encounter
D subsequent encounter
S sequela
Instructional notes 5
T28code
S00-T88chapter
Notes
- Use secondary code(s) from Chapter 20, External causes of morbidity, to indicate cause of injury. Codes within the T section that include the external cause do not require an additional external cause code
- The chapter uses the S-section for coding different types of injuries related to single body regions and the T-section to cover injuries to unspecified body regions as well as poisoning and certain other consequences of external causes.
Use additional code
- code to identify any retained foreign body, if applicable (Z18.-)Z18.-
Index entries leading here filed at null
No alphabetic index entry points at this code.
Alongside this code 9 same parent — T28
T28.0 Burn of mouth and pharynx category T28.1 Burn of esophagus category T28.2 Burn of other parts of alimentary tract category T28.3 Burn of internal genitourinary organs category T28.5 Corrosion of mouth and pharynx category T28.6 Corrosion of esophagus category T28.7 Corrosion of other parts of alimentary tract category T28.8 Corrosion of internal genitourinary organs category T28.9 Corrosions of other and unspecified internal organs category
Subordinate codes 3
Additional references
AHA Coding Clinic® Licence required
Official coding advice for this code. Published by the American Hospital Association. Not included in this installation.