T88.1Other complications following immunization, not elsewhere classified

T88.1 is the ICD-10-CM diagnosis code for other complications following immunization, not elsewhere classified. It belongs to category T88 (other complications of surgical and medical care, not elsewhere classified), block T80-T88 (complications of surgical and medical care, not elsewhere classified) and chapter 19 (injury, poisoning and certain other consequences of external causes). It is a header code, so it can't be reported by itself; one of its 3 subcodes must be used instead.

Within T88, choose T88.1 (Other complications following immunization, not elsewhere classified) only when documentation doesn't support a more specific option: infection following immunization (T88.0), shock due to anesthesia (T88.2), malignant hyperthermia due to anesthesia (T88.3), failed or difficult intubation (T88.4), other complications of anesthesia (T88.5), anaphylactic reaction due to adverse effect of correct drug or medicament properly administered (T88.6), unspecified adverse effect of drug or medicament (T88.7), other specified complications of surgical and medical care, not elsewhere classified (T88.8) and 1 more.

Codes in this range require a 7th character: A for initial encounter, D for subsequent encounter and S for sequela. Use placeholder "X" characters to fill any empty positions before the 7th character.

Don't report T88.1 together with the conditions in its Excludes1 note: vaccinia not from vaccine (B08.011).

The conditions in its Excludes2 note aren't part of T88.1, but may be coded alongside it if the patient has both: anaphylactic shock due to serum (T80.5-), other serum reactions (T80.6-), postimmunization arthropathy (M02.2), postimmunization encephalitis (G04.02) and 1 more.

It has been part of ICD-10-CM since the code set took effect on October 1, 2015 and hasn't changed since.