T40.416D Underdosing of fentanyl or fentanyl analogs, subsequent encounter

Billable / valid for submission ICD10CM Release FY2026

Short description: Underdosing of fentanyl or fentanyl analogs, subs

Version history

Related codes in T40

• T40 Poisoning by, adverse effect of and underdosing of narcotics and psychodysleptics [hallucinogens]
• T40.0 Poisoning by, adverse effect of and underdosing of opium
• T40.0X Poisoning by, adverse effect of and underdosing of opium
• T40.0X1 Poisoning by opium, accidental (unintentional)
• T40.0X1A Poisoning by opium, accidental (unintentional), initial encounter
• T40.0X1D Poisoning by opium, accidental (unintentional), subsequent encounter
• T40.0X1S Poisoning by opium, accidental (unintentional), sequela
• T40.0X2 Poisoning by opium, intentional self-harm
• T40.0X2A Poisoning by opium, intentional self-harm, initial encounter
• T40.0X2D Poisoning by opium, intentional self-harm, subsequent encounter
• T40.0X2S Poisoning by opium, intentional self-harm, sequela
• T40.0X3 Poisoning by opium, assault
• T40.0X3A Poisoning by opium, assault, initial encounter
• T40.0X3D Poisoning by opium, assault, subsequent encounter
• T40.0X3S Poisoning by opium, assault, sequela
• T40.0X4 Poisoning by opium, undetermined
• T40.0X4A Poisoning by opium, undetermined, initial encounter
• T40.0X4D Poisoning by opium, undetermined, subsequent encounter
• T40.0X4S Poisoning by opium, undetermined, sequela
• T40.0X5 Adverse effect of opium

All T40 codes →