T45
Poisoning by, adverse effect of and underdosing of primarily systemic and hematological agents, not elsewhere classified
Not billable — category only FY2026 2025-10-01 → 2026-09-30
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 1
- Adverse effect — see Table of Drugs and Chemicals, categories T36-T50, with 6th character 5
Subordinate codes 11
T45.0 Antiallergic and antiemetic drugs T45.1 Antineoplastic and immunosuppressive drugs T45.2 Poisoning by, adverse effect of and underdosing of vitamins T45.3 Poisoning by, adverse effect of and underdosing of enzymes T45.4 Iron and its compounds T45.5 Anticoagulants and antithrombotic drugs T45.6 Fibrinolysis-affecting drugs T45.7 Anticoagulant antagonists, vitamin K and oth coagulants T45.8 Primarily systemic and hematological agents T45.9 Unsp primarily systemic and hematological agent T45.A Immune checkpoint inhibitors and immunostimulant drugs
Medications 1
MED-RT files conditions by MeSH, which carves the world differently from ICD-10. These are name matches on this code's description, offered as candidates — not as an assertion that they are this code.
Additional references
AHA Coding Clinic® Licence required
Official coding advice for this code. Published by the American Hospital Association. Not included in this installation.