Is T37.2X3 a billable ICD-10-CM code?

No. T37.2X3 is a non-billable header code. Code to a higher level of specificity using one of its child codes.

Where does T37.2X3 sit in the tabular list?

Injury, poisoning and certain other consequences of external causes (S00-T88), in the block Poisoning by, adverse effects of and underdosing of drugs, medicaments and biological substances (T36-T50).

What cannot be coded together with T37.2X3?

T37.2X3 carries Excludes1 notes, which means the conditions they list can never be coded together with it on the same encounter. Some are written on the categories above T37.2X3 (T37.2, T37) and apply to it just the same.

T37.2X3

T37.2X3 — Poisoning by antimalarials and drugs acting on other blood protozoa, assault

Non-billable headerICD-10-CM

T37.2X3 is a non-billable header ICD-10-CM code for poisoning by antimalarials and drugs acting on other blood protozoa, assault. 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 T37

A: initial encounter
D: subsequent encounter
S: sequela

Excludes1 inherited from the categories above T37.2X3

These are not written on T37.2X3, but they bind it: a note on a category applies to every code beneath it. Billing T37.2X3 with anything listed here is a denial.

Written on T37.2 — Poisoning by, adverse effect of and underdosing of antimalarials and drugs acting on other blood protozoa

hydroxyquinoline derivatives (T37.8-)

Written on T37 — Poisoning by, adverse effect of and underdosing of other systemic anti-infectives and antiparasitics

anti-infectives topically used for ear, nose and throat (T49.6-)
anti-infectives topically used for eye (T49.5-)
locally applied anti-infectives NEC (T49.0-)

Risk adjustment

T37.2X3 does not map to an HCC and does not risk-adjust under CMS-HCC V28. That is normal — most ICD-10 codes do not. It still needs to be coded correctly; it just will not move a RAF score.

Code history

T37.2X3 has not changed since FY2024 — no addition, revision or deletion across the FY2024–FY2027 ICD-10-CM releases.

Code to one of these instead T37.2X3

3 child codes. Green means billable.

Related codes at this level

Codes that share T37.2X. If T37.2X3 is not quite right, the correct code is usually one of these.

Questions about T37.2X3

Is T37.2X3 a billable ICD-10-CM code?: No. T37.2X3 is a non-billable header code. Code to a higher level of specificity using one of its child codes.
Where does T37.2X3 sit in the tabular list?: Injury, poisoning and certain other consequences of external causes (S00-T88), in the block Poisoning by, adverse effects of and underdosing of drugs, medicaments and biological substances (T36-T50).
What cannot be coded together with T37.2X3?: T37.2X3 carries Excludes1 notes, which means the conditions they list can never be coded together with it on the same encounter. Some are written on the categories above T37.2X3 (T37.2, T37) and apply to it just the same.