MCMCB Pro
T48.1

T48.1Poisoning by, adverse effect of and underdosing of skeletal muscle relaxants [neuromuscular blocking agents]

Non-billable headerICD-10-CM

T48.1 is a non-billable header ICD-10-CM code for poisoning by, adverse effect of and underdosing of skeletal muscle relaxants [neuromuscular blocking agents]. 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 T48

A
initial encounter
D
subsequent encounter
S
sequela

Risk adjustment

T48.1 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 to one of these instead T48.1

1 child code. Green means billable.

Related codes at this level

Codes that share T48. If T48.1 is not quite right, the correct code is usually one of these.

Questions about T48.1

Is T48.1 a billable ICD-10-CM code?
No. T48.1 is a non-billable header code. Code to a higher level of specificity using one of its child codes.
Where does T48.1 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).
ICD-10-CMFY2026-Apr· effective April 1, 2026

Loaded directly from the CMS/NCHS ICD-10-CM public-domain release — see data sources and our editorial policy. If this page disagrees with the CMS tabular list, this page is wrong. Reference information for professional coders; not medical or billing advice.