POA indicator U means that the documentation is insufficient to determine whether the condition was present on admission.
This is different from Y, which indicates that the condition was present when inpatient admission occurred, and N, which indicates that the condition was not present at admission. Indicator W is used when the provider is unable to clinically determine whether the condition was present at the time of inpatient admission.
The distinction between U and W is especially important. U reflects inadequacy of the documentation, whereas W reflects a clinical determination that the timing cannot be established despite appropriate evaluation.
CDI specialists should generally attempt to resolve unclear timing when clinically feasible before a case reaches final coding. Accurate POA assignment can influence CMS Hospital-Acquired Condition payment logic and quality measurement.
CMS publishes an annual list of diagnoses exempt from POA reporting and maintains the FY 2026 POA resources separately from the HAC code lists.
POA reporting focuses on the condition's status at inpatient admission, not merely when it was first documented or when diagnostic confirmation became available.
CCDS Reference Topics: POA indicators; U versus W; HACs; admission timing; inpatient reporting.
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