O07 vs T79.0
O07 and T79.0 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.
O07
Failed attempted termination of pregnancy
Not billable
- Chapter 15
- Pregnancy, childbirth and the puerperium
- Section
- O00-O08
Use when the record says
- failure of attempted induction of termination of pregnancy
- incomplete elective abortion
T79.0
Air embolism (traumatic)
Not billable
- Chapter 19
- Injury, poisoning and certain other consequences of external causes
- Section
- T79
Indexed under
- Air › embolism
- Embolism › air (multiple) (paradoxical)
- Air › embolism › traumatic
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