Mass. Gen. Laws ch. 112 § 12DD
"Long-term antibiotic therapy", the administration of oral, intramuscular or intravenous antibiotics singly or in combination, for periods of time in excess of 4 weeks.
"Lyme disease", the clinical diagnosis of a patient by a physician licensed under section 2 of the presence of signs or symptoms compatible with acute infection with Borrelia burgdorferi; late stage, persistent or chronic infection with Borrelia burgdorferi; complications related to such infection; or with such other strains of Borrelia that become identified or recognized by the National Centers for Disease Control and Prevention as a cause of Lyme disease; provided, however, that "Lyme disease" shall also include an infection that meets the surveillance criteria set forth by the National Centers for Disease Control and Prevention and a clinical diagnosis of Lyme disease that does not meet the National Centers for Disease Control and Prevention surveillance criteria but presents other acute and chronic signs or symptoms of Lyme disease as determined by the treating physician; and provided further, that clinical diagnosis shall be based on knowledge obtained through medical history and physical examination only or in conjunction with testing that provides supportive data for such clinical diagnosis.
Mass. Gen. Laws ch. 112, § 12DD