A condition can be assigned present-on-admission status even when the definitive diagnosis is not made until later in the hospitalization. POA refers to whether the condition was present at the time the order for inpatient admission occurred, not the calendar date on which diagnostic confirmation became available.

This distinction is particularly relevant for infections, malignancies, fractures, acute vascular events, and other conditions whose definitive identification may require cultures, pathology, imaging, or additional diagnostic testing.

Therefore, a blood culture finalized on hospital day 3 does not automatically make the infection hospital acquired. The clinical record and provider documentation must establish whether the disease process was present at admission.

POA assignment applies to applicable principal and secondary diagnoses, not only the principal diagnosis. CDI specialists should recognize unclear timing as a potential clarification opportunity because POA status can affect CMS Hospital-Acquired Condition payment logic and quality reporting.

The CCDS content outline expressly includes the basics of POA assignment and its impact on payment, as well as identification of CMS HACs.

CCDS Reference Topics: Present on admission; diagnosis timing; HACs; inpatient coding; quality reporting.

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