Procalcitonin levels checked initially and at 24 hours will correlate with disease severity, morbidity, and mortality. Patients who have a higher procalcitonin level initially and at 24 hours will likely have higher qSOFA scores, longer lengths of stay, longer duration of antibiotics and higher 30 day mortality rates.

A procalcitonin order bundle will be created for admitted patients with pneumonia. This prepopulated bundle includes an initial and 24 hour procalcitonin level, much like the current initial and 4 hour lactate orders are set-up. These patients will receive treatment for their pneumonia as is deemed appropriate by their care teams, both in the Emergency Department and while an inpatient. Then, after discharge, the 30 day mortality, length of stay, choice of antibiotic therapy, and qSOFA score (which will be retroactively calculated) will be compared to the patient's initial and 24 hour procalcitonin level.

Inclusion Criteria:

• All patients seen at Lakeland St. Joseph and Niles Hospitals in the emergency department and who are then subsequently admitted with pneumonia at Lakeland St. Joseph and Niles Hospitals

Exclusion Criteria:

• Any patients not admitted with pneumonia, any patients who are admitted with another primary diagnosis other than pneumonia, any patients who do not have an initial or 24 hour procalcitonin level result, and any patients less than 18 years old

All patients seen at Lakeland St. Joseph and Niles Hospitals in the emergency department and who are then subsequently admitted with pneumonia at Lakeland St. Joseph and Niles Hospitals

No plans to share IPD data