According to the one-day payment window reimbursement guidelines, most professional and outpatient diagnostic and nondiagnostic services that are rendered within 1 day of an inpatient hospital stay and are related to the inpatient hospital admission will not be reimbursed separately from the inpatient hospital stay if the services are rendered by the hospital or an entity that is wholly owned or operated by the hospital.
The one-day payment window reimbursement guidelines do not apply for professional FQHC services, RHC services, ambulance services, some renal dialysis services, and services that are rendered in the inpatient hospital setting.
