T50.9

T50.9: Poisoning by, adverse effect of and underdosing of other and unspecified drugs, medicaments and biological substances

Non-billable headerICD-10-CM

T50.9 is a non-billable header ICD-10-CM code for poisoning by, adverse effect of and underdosing of other and unspecified drugs, medicaments and biological substances. 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 T50

A: initial encounter
D: subsequent encounter
S: sequela

Other codes that can never be billed with T50.9

Their own Excludes1 notes name this code, so the conflict is not listed above.

T38Poisoning by, adverse effect of and underdosing of hormones and their synthetic substitutes and antagonists, not elsewhere classified

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 T50.9

3 child codes. Green means billable.