In this section the following words have the meanings indicated. “Hospital” has the meaning stated in § 19-301 of the Health - General Article. “Related institution” has the meaning stated in § 19-301 of the Health - General Article. Except as provided in subsection (c) of this section, a hospital or related institution is not immune from liability for negligence or any other tort on the grounds that the hospital or related institution is a charitable institution. A hospital or related institution that is a charitable institution and is insured against this liability in an amount of not less than $100,000 is not liable for damages in excess of the limits of that insurance.