The Centers for Medicare & Medicaid Services (CMS) has provided the following compliance notice:^[1] “In a recent report,^[[2]] the Office of Inspector General (OIG) determined that Medicare made incorrect payments for non-physician outpatient services provided shortly before or during inpatient stays. Review the FAQs on the 3-Day Payment Window for Services Provided to Outpatients Who Later Are Admitted as Inpatients (PDF)^[[3]] MLN Matters Article to bill correctly for these services. Additional resources: