FY2027
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Excludes1 pair

O07- vs T79.4-

O07 and T79.4 are not coded together. ICD-10-CM declares them mutually exclusive with an Excludes1 note — the two conditions are not expected to occur together, so exactly one of them is normally correct for a given encounter. The Official Guidelines carve out one exception: if the two conditions are clearly unrelated to each other, both may be reported.

The official note, declared on T79.4
shock complicating abortion or ectopic or molar pregnancy (O00-O07, O08.3)
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
T79.4

Traumatic shock

Not billable
Chapter 19
Injury, poisoning and certain other consequences of external causes
Section
T79
Use when the record says
  • Shock (immediate) (delayed) following injury
Indexed under
  • Feeble rapid pulse due to shock following injury
  • Decrease › respiration, due to shock following injury
  • Hypovolemia › traumatic (shock)
  • Pulse › feeble, rapid due to shock following injury
  • Rapid › feeble pulse, due to shock, following injury

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