Sec. 5. As used in this chapter, "taxpayer" means an individual who: (1) is a physician practicing as a primary care physician; (2) has an ownership interest in a corporation, limited liability company, partnership, or other legal entity organized to provide primary health care services as a physician owned entity; (3) is not employed by a health system (as defined in IC 16-18-2-168.5); and (4) has any state income tax liability. As added by P.L.203-2023, SEC.3.