Md. Code, Health - General § 18–203

Notwithstanding any other provision of law, the Department may provide patient-identifying information for patients treated in this State for cancer to a cancer control agency in another state if:

(1) The patient is a resident of the other state;

(2) The Department determines that the agency will preserve the confidentiality of the information; and

(3) The other state has authority to provide equivalent information on Maryland residents to this State.