T44.8
ICD-10Non-billable categoryCentrally-acting and adrenergic-neuron- blocking agents
Official ICD-10-CM descriptor (FY2026)
Poisoning by, adverse effect of and underdosing of centrally-acting and adrenergic-neuron- blocking agents
T44.8 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.
Excludes2
Not included here. The condition is not part of this code, but a patient may have both, and both codes may be reported together.
- poisoning by, adverse effect of and underdosing of clonidine (T46.5)
- poisoning by, adverse effect of and underdosing of guanethidine (T46.5)
ICD-10-CM FY2026 defines 1 code beneath T44.8. See the ICD-10-CM index for what this site publishes.
Related codes in T44
- T44.0Anticholinesterase agentscategory
- T44.1Parasympathomimeticscategory
- T44.2Ganglionic blocking drugscategory
- T44.3Parasympatholytics and spasmolyticscategory
- T44.4Predominantly alpha-adrenoreceptor agonistscategory
- T44.5Predominantly beta-adrenoreceptor agonistscategory
- T44.6Alpha-adrenoreceptor antagonistscategory
- T44.7Beta-adrenoreceptor antagonistscategory
- T44.9And unsp drugs aff the autonomic nervous systemcategory
Where this code sits
- Parent code
- T44
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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.