Md. Code, Health - General § 24–2502

(a) A person whose primary business is providing medical services, products, or devices, or the person’s agent or assignee:

(1) May not disclose any portion of a medical debt to a consumer reporting agency; and

(2) Shall include in any contract entered into with a collection entity for the purchase or collection of medical debt a provision prohibiting the disclosure of any portion of the medical debt to a consumer reporting agency.

(b) A contract entered into on or after October 1, 2025, that does not include the provision required under subsection (a)(2) of this section is void and unenforceable.