30-day all-payer all hospital (both intra- and inter-hospital) readmission rate with adjustments for patient severity and planned admissions. Unique patient identifiers from CRISP are used to be able to track patients across hospitals for readmissions.

Number of observed hospital-specific unplanned readmissions.

Number of expected hospital specific unplanned readmissions based upon discharge APR-DRG and Severity of Illness. The expected value of readmissions is the number of readmissions a hospital would have experienced had its rate of readmissions been identical to that experienced by a reference or normative set of hospitals, given its mix of patients as defined by discharge APR-DRG category and SOI level (indirect standardisation).

Planned readmissions are excluded from the numerator (includes vaginal and C-section deliveries and rehabilitation). Planned admissions are counted as eligible discharges in the denominator, because they could have an unplanned readmission. Discharges for newborn, bone marrow transplants and liquid tumour patients by making these discharges not eligible to have an unplanned readmission or count as an unplanned readmission, patients with a discharge disposition of Left Against Medical Advice A hospitalisation within 30 days of a hospital discharge where a patient dies is counted as a readmission; however, the readmission is removed from the denominator because the case is not eligible for a subsequent readmission. Admissions that result in transfers, defined as cases where the discharge date of the admission is on the same or next day as the admission date of the subsequent admission, are removed from the denominator. Thus, only one admission is counted in the denominator, and that is the admission to the transfer hospital (unless otherwise ineligible, i.e., died). It is the second discharge date from the admission to the transfer hospital that is used to calculate the 30-day readmission window.

Adjustments for patient severity (based upon discharge all-patient refined diagnosis-related group severity of illness [APR-DRG SOI]) and planned admissions

Unique patient identifiers from Chesapeake Regional Information System for Our Patients (CRISP) are used to be able to track patients across hospitals for readmissions.

Not publicly reported based on current evidence. Linked to payments

hscrc.maryland.gov/Documents/Quality_Documents/RRIP/RY2023/RY%202023%20Final%20RRIP.docx.pdf