T45
ICD-10Non-billable categoryPrimarily systemic and hematological agents, NEC
Official ICD-10-CM descriptor (FY2026)
Poisoning by, adverse effect of and underdosing of primarily systemic and hematological agents, not elsewhere classified
T45 is a category heading, not a billable code. CMS does not accept it on a claim; report one of the more specific codes beneath it.
7th character
- The appropriate 7th character is to be added to each code from category T45
Permitted 7th characters
| A | initial encounter |
| D | subsequent encounter |
| S | sequela |
More specific codes under T45
- T45.0Antiallergic and antiemetic drugscategory
- T45.1Antineoplastic and immunosuppressive drugscategory
- T45.2Poisoning by, adverse effect of and underdosing of vitaminscategory
- T45.3Poisoning by, adverse effect of and underdosing of enzymescategory
- T45.4Iron and its compoundscategory
- T45.5Anticoagulants and antithrombotic drugscategory
- T45.6Fibrinolysis-affecting drugscategory
- T45.7Anticoagulant antagonists, vitamin K and oth coagulantscategory
- T45.8Primarily systemic and hematological agentscategory
- T45.9Unsp primarily systemic and hematological agentcategory
- T45.AImmune checkpoint inhibitors and immunostimulant drugscategory
Where this code sits
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ICD-10-CM FY2026. Centers for Medicare & Medicaid Services (CMS) / National Center for Health Statistics (NCHS), “2026 ICD-10-CM Code Descriptions in Tabular Order” (icd10cm_order_2026.txt). Download the original file from cms.gov. Public domain (US Government work). Descriptors, billable flags and instructional notes on this page are reproduced from that file without modification. Krasyn adds no clinical guidance.