Is T40.0X a billable code?
No. T40.0X is a header code that groups 18 more specific codes. Use one of the billable codes listed on this page instead.
ICD-10-CM FY2027 diagnosis code
T40.0X: Poisoning by, adverse effect of and underdosing of opium
Header code: not billableValid for dates of service October 1, 2026 to September 30, 2027
T40.0X groups related diagnoses under poisoning by, adverse effect of and underdosing of opium. It cannot be used on a claim by itself. Choose the billable code below that matches the patient's record.
Billable codes under T40.0X
- T40.0X1APoisoning by opium, accidental (unintentional), initial encounter
- T40.0X1DPoisoning by opium, accidental (unintentional), subsequent encounter
- T40.0X1SPoisoning by opium, accidental (unintentional), sequela
- T40.0X2APoisoning by opium, intentional self-harm, initial encounter
- T40.0X2DPoisoning by opium, intentional self-harm, subsequent encounter
- T40.0X2SPoisoning by opium, intentional self-harm, sequela
- T40.0X3APoisoning by opium, assault, initial encounter
- T40.0X3DPoisoning by opium, assault, subsequent encounter
- T40.0X3SPoisoning by opium, assault, sequela
- T40.0X4APoisoning by opium, undetermined, initial encounter
- T40.0X4DPoisoning by opium, undetermined, subsequent encounter
- T40.0X4SPoisoning by opium, undetermined, sequela
- T40.0X5AAdverse effect of opium, initial encounter
- T40.0X5DAdverse effect of opium, subsequent encounter
- T40.0X5SAdverse effect of opium, sequela
- T40.0X6AUnderdosing of opium, initial encounter
- T40.0X6DUnderdosing of opium, subsequent encounter
- T40.0X6SUnderdosing of opium, sequela
T40.0X questions
What does T40.0X mean?
T40.0X is the ICD-10-CM code for Poisoning by, adverse effect of and underdosing of opium. It is in chapter 19, Injury, poisoning and certain other consequences of external causes (S00-T88).
Code titles come from the official ICD-10-CM files published by the CDC National Center for Health Statistics. Always check payer rules and the clinical record before billing.