Md. Code, Health - General § 19–705.4

(a) Any limitation imposed by a health maintenance organization on the receipt of covered services provided to a member or subscriber by a physical therapist licensed under Title 13 of the Health Occupations Article may only be imposed per incident or per injury within a contract period.

(b) This subsection may not be construed to prohibit a health maintenance organization from imposing any limitations on the number of visits permitted for a member or subscriber.