Before a Medicaid home care agency can bill for services, those services must be authorized by the payer — either the state Medicaid agency or a Managed Care Organization (MCO). The authorization specifies how many hours of care the patient is approved to receive, during what time period, and under which service code. It is the payer's formal approval for the care.
When an authorization period ends, any hours that were approved but not utilized cannot be billed. There is no retroactive option. The payer approved the care for a specific window. If the agency didn't schedule and deliver it in that window, the hours expire with the authorization period.
This is not an obscure edge case. It is a routine revenue loss at almost every agency that doesn't have a system specifically watching utilization across the entire patient roster, every week.