What is included in medical expenses?

Dear All

I am unable to answer on following query raised by my friend-

His employer is providing him 15000/- Medical reimbursement as a part of his salary package. So he is required to submit medical bills to his employer to claim reimbursement but he has a query, whether he can submit -

1) the bills containing Medical tests instead of Medicines bills?

2) Whether he can submit the bills for April & May month in the month of June (In a single bill)??

Please resolve the queries?

Thanks