Inpatient case: A patient is admitted with sepsis due to pneumonia, both present on admission. There is no acute organ dysfunction and no septic shock. How should the diagnoses be sequenced?
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Answer: D
Pneumonia first, followed by sepsis: Wrong. When sepsis and a localized infection are both present on admission, the systemic infection is sequenced first.
Severe sepsis code first, followed by pneumonia: Wrong. Severe sepsis requires associated acute organ dysfunction, which is not present. The severe sepsis code can also never be principal.
SIRS code for infectious origin first, followed by the pneumonia as the localized infection: Wrong. Sepsis is coded to the underlying systemic infection code. A SIRS code is not used for sepsis due to infection.
The underlying systemic infection (sepsis) code first, followed by pneumonia: Correct. If the reason for admission is sepsis and a localized infection such as pneumonia, the guidelines direct that the systemic infection be sequenced first and the localized infection be coded secondarily.
Sepsis plus a localized infection at admission: sepsis (systemic infection) first, then the localized infection. Add the severe sepsis code only when organ dysfunction is documented, and never as principal.