Hospitalisation often involves other costs that you do not incur during the hospitalisation itself, but which are related to it, such as medication, visits to a specialist, physiotherapy or medical examinations before or after your admission. In most policies, such outpatient expenses are covered by a so-called 'pre-post' period, a period before and after your hospitalisation.
The outpatient expenses you can submit and the exact period that applies as a pre-post period depend on your policy. So check your policy conditions to be sure.
You can only submit outpatient expenses in the context of a pre-post period that are registered in the name of the hospitalised person.