Freestanding emergency departments. Requires the Board of Health to promulgate regulations related to freestanding emergency departments, defined in the bill as facilities located in the Commonwealth that (i) provide emergency services, (ii) are owned and operated by a licensed hospital and operate under the hospital’s license, and (iii) are located on separate premises from the primary campus of the hospital. The bill also requires freestanding emergency departments to make certain disclosures to patients, in advertisements, and on any online platforms associated with such emergency department.