Miss. Code Ann. § 41-41-229

On petition of a patient, the patient’s agent, guardian, or surrogate, a health-care provider or institution involved with the patient’s care, or an individual described in Section 41-41-211(2) or (3), any court of competent jurisdiction may enjoin or direct a health-care decision or order other equitable relief. A proceeding under this section shall be governed by the Mississippi Rules of Civil Procedure.