A prescription is required initially if you want your walker to be covered by Medicare. If your walker needs repair or is lost or stolen, a new prescription may not be needed. A prescription is not generally needed to purchase a walker directly from a supplier without using insurance. A prescription is required initially if you want your walker to be covered by Medicare. If your walker needs repair or is lost or stolen, a new prescription may not be needed. A prescription is not generally needed to purchase a walker directly from a supplier without using insurance.