T40.605
Non-billableAdverse effect of unspecified narcotics
T40.605 is the ICD-10-CM code for Adverse effect of unspecified narcotics. It is a non-billable category code — use a more specific child code such as T40.605A for billing.
S00-T88 Injury, poisoning and certain other consequences of external causes
What this means — in plain language
MedlinePlus · NIHMost of the time, medicines make our lives better. They reduce aches and pains, fight infections, and control problems such as high blood pressure or diabetes. But medicines can also cause unwanted reactions, such as drug interactions, side effects, and allergies. What is a drug interaction? A drug interaction is a change in the way a drug acts in the body when taken with certain other drugs, foods, or supplements…
Read more about Drug Reactions at MedlinePlus ↗Source: U.S. National Library of Medicine (MedlinePlus). Informational only — not medical advice.
Frequently asked questions
Source: CMS ICD-10-CM FY2026. For informational purposes only — not medical advice. See our medical disclaimer.
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