Applicability of VAT on amounts charged by hospitals for grating a sick leave certificate

A patient is required to furnish a sick leave certificate to it's employer (say Company A). In order to grant such sick leave certificates, the hospital charges a particular amount (say AED 50) over and above the fee towards healthcare services. Whether VAT should be applicable on such amount charged for providing sick leave certificates. Can a position be adopted that the same is part of Healthcare services rendered by hospitals and hence zero rated.