T45.96
Underdosing of unspecified primarily systemic and hematological agent
Not billable — category only FY2026 2025-10-01 → 2026-09-30
This is the unspecified option. 5 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 3
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 2
Alongside this code 5 same parent — T45.9
T45.91 Poisn by unsp primarily systemic and hematolog agent, acc category T45.92 Poisn by unsp prim systemic and hematolog agent, self-harm category T45.93 Poisn by unsp prim systemic and hematolog agent, assault category T45.94 Poisn by unsp primarily systemic and hematolog agent, undet category T45.95 Adverse effect of unsp prim systemic and hematolog agent category
Additional references
AHA Coding Clinic® Licence required
Official coding advice for this code. Published by the American Hospital Association. Not included in this installation.