MCMCB Pro
Y84

Y84Other medical procedures as the cause of abnormal reaction of the patient, or of later complication, without mention of misadventure at the time of the procedure

Non-billable headerICD-10-CM

Y84 is a non-billable header ICD-10-CM code for other medical procedures as the cause of abnormal reaction of the patient, or of later complication, without mention of misadventure at the time of the procedure. It cannot be billed on its own: choose one of the more specific child codes below.

Risk adjustment

Y84 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 Y84

10 child codes. Green means billable.

Questions about Y84

Is Y84 a billable ICD-10-CM code?
No. Y84 is a non-billable header code. Code to a higher level of specificity using one of its child codes.
Where does Y84 sit in the tabular list?
External causes of morbidity (V00-Y99), in the block Surgical and other medical procedures as the cause of abnormal reaction of the patient, or of later complication, without mention of misadventure at the time of the procedure (Y83-Y84).
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.