T40.996

T40.996: Underdosing of other psychodysleptics [hallucinogens]

Non-billable headerICD-10-CM

T40.996 is a non-billable header ICD-10-CM code for underdosing of other psychodysleptics [hallucinogens]. It cannot be billed on its own: choose one of the more specific child codes below. This code also requires a 7th character before it is complete.

This code requires a 7th character

The appropriate 7th character is to be added to each code from category T40

A: initial encounter
D: subsequent encounter
S: sequela

Excludes2 inherited from the categories above T40.996

Not part of this code, but both may be coded when both are present.

Written on T40: Poisoning by, adverse effect of and underdosing of narcotics and psychodysleptics [hallucinogens]

drug dependence and related mental and behavioral disorders due to psychoactive substance use (F10.-F19.-)

Risk adjustment

No CMS-HCC V28 category: this code does not change a RAF score.

Code history

Unchanged in every release from FY2024 to FY2027.

Code to one of these instead T40.996

3 child codes. Green means billable.