T50.916
Underdosing of multiple unspecified drugs, medicaments and biological substances
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 — T50.91
T50.911 Poisoning by multiple unsp drug/meds/biol subst, accidental category T50.912 Poisoning by multiple unsp drug/meds/biol subst, self-harm category T50.913 Poisoning by multiple unsp drug/meds/biol subst, assault category T50.914 Poisoning by multiple unsp drug/meds/biol subst, undet category T50.915 Adverse effect of multiple unspecified drug/meds/biol subst 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.