T43.3X6

T43.3X6: Underdosing of phenothiazine antipsychotics and neuroleptics

Non-billable headerICD-10-CM

T43.3X6 is a non-billable header ICD-10-CM code for underdosing of phenothiazine antipsychotics and neuroleptics. 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 T43

A: initial encounter
D: subsequent encounter
S: sequela

Excludes2 inherited from the categories above T43.3X6

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

Written on T43: Poisoning by, adverse effect of and underdosing of psychotropic drugs, not elsewhere classified

appetite depressants (T50.5-)
barbiturates (T42.3-)
benzodiazepines (T42.4-)
drug dependence and related mental and behavioral disorders due to psychoactive substance use (F10.- -F19.-)
methaqualone (T42.6-)
psychodysleptics [hallucinogens] (T40.7-T40.9-)

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 T43.3X6

3 child codes. Green means billable.