R57 vs T88.6
R57 and T88.6 can never be reported together. ICD-10-CM declares them mutually exclusive with an Excludes1 note, meaning the two conditions cannot occur in the same patient — so exactly one of them is correct for any given encounter.
Shock, not elsewhere classified
- Chapter 18
- Symptoms, signs and abnormal clinical and laboratory findings, not elsewhere classified
- Section
- R50-R69
Anaphylactic reaction due to adverse effect of correct drug or medicament properly administered
- Chapter 19
- Injury, poisoning and certain other consequences of external causes
- Section
- T80-T88
- Anaphylactic shock due to adverse effect of correct drug or medicament properly administered
- Anaphylactoid reaction NOS
- Shock › drug › due to correct substance properly administered
- Allergy, allergic › shock › due to › adverse effect of correct medicinal substance properly administered (reaction) (to)
- Shock › anaphylactic › due to drug or medicinal substance › correct substance properly administered
These two codes sit in different chapters of the Tabular List, which is usually the clearest signal that they describe different underlying processes rather than different degrees of the same one.
Excludes1 is not always absolute: where two conditions covered by the note are genuinely unrelated, CMS guidance permits reporting both. Document the reasoning rather than assuming it. More on Excludes1 vs Excludes2 · FY2027