Is T40.996 a billable code?
No. T40.996 is a header code that groups 3 more specific codes. Use one of the billable codes listed on this page instead.
ICD-10-CM FY2027 diagnosis code
T40.996: Underdosing of other psychodysleptics [hallucinogens]
Header code: not billableValid for dates of service October 1, 2026 to September 30, 2027
T40.996 groups related diagnoses under underdosing of other psychodysleptics [hallucinogens]. It cannot be used on a claim by itself. Choose the billable code below that matches the patient's record.
Billable codes under T40.996
- T40.996AUnderdosing of other psychodysleptics [hallucinogens], initial encounter
- T40.996DUnderdosing of other psychodysleptics [hallucinogens], subsequent encounter
- T40.996SUnderdosing of other psychodysleptics [hallucinogens], sequela
Other codes in T40.99 Poisoning by, adverse effect of and underdosing of other psychodysleptics [hallucinogens]
- T40.991Poisoning by other psychodysleptics [hallucinogens], accidental (unintentional)header
- T40.992Poisoning by other psychodysleptics [hallucinogens], intentional self-harmheader
- T40.993Poisoning by other psychodysleptics [hallucinogens], assaultheader
- T40.994Poisoning by other psychodysleptics [hallucinogens], undeterminedheader
- T40.995Adverse effect of other psychodysleptics [hallucinogens]header
T40.996 questions
What does T40.996 mean?
T40.996 is the ICD-10-CM code for Underdosing of other psychodysleptics [hallucinogens]. 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.