Modifies provisions relating to advanced practice registered nurses

HB 1989 modifies Missouri law to expand prescribing authority for advanced practice registered nurses (APRNs). It allows APRNs with a certificate from the Missouri Board of Nursing to prescribe medications in Schedules III, IV, and V of controlled substances, and limited Schedule II drugs (like hydrocodone for hospice patients) in 120-hour supplies without refills. APRNs must either work under a collaborative practice agreement with a physician or qualify for an exemption from that requirement. This directly affects APRNs providing patient care in Missouri, particularly in settings where they previously faced restrictions on prescribing these medications.