The beginning date of the beneficiary's Non-covered stay.
Medicare places limits on the number of days of inpatient or SNF care that a beneficiary may receive.
For some beneficiaries, all days in one of these settings may not be covered by Medicare.
Derivation Rules: Based on the presence of the occurrence span code (variable called CLM_SPAN_CD) 74, 76, 77, or 79. When this code value is present the date is populated using the CLM_SPAN_FROM_DT.
Source: NCH QA Process