Maryland Code, Criminal Procedure § 11-615

(a) In a restitution hearing held under § 11-603 of this subtitle, a written statement or bill for medical, dental, hospital, counseling, funeral, or burial expenses is legally sufficient evidence of the amount, fairness, and reasonableness of the charges and the necessity of the services or materials provided.

(b) A person who challenges the fairness and reasonableness or the necessity of the amount on the statement or bill has the burden of proving that the amount is not fair and reasonable.