FY2027
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Excludes1 pair

R57- vs T79.4-

R57 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 R57
traumatic shock (T79.4)
R57

Shock, not elsewhere classified

Not billable
Chapter 18
Symptoms, signs and abnormal clinical and laboratory findings, not elsewhere classified
Section
R50-R69
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