This case-sensitive code system https://www.cms.gov/Medicare/Medicare-Fee-for-Service-Payment/HospitalAcqCond/Coding
defines the following codes:
Code | Definition |
Y | Diagnosis was present at time of inpatient admission. |
N | Diagnosis was not present at time of inpatient admission. |
U | Documentation insufficient to determine if the condition was present at the time of inpatient admission. |
W | Clinically undetermined. Provider unable to clinically determine whether the condition was present at the time of inpatient admission. |
1 | Unreported/Not used. Exempt from POA reporting. This code is equivalent to a blank on the UB-04, however; it was determined that blanks are undesirable when submitting this data via the 4010A. |