with respect to—
(i)#
outpatient hospital radiology services (including diagnostic and therapeutic radiology, nuclear medicine and CAT scan procedures, magnetic resonance imaging, and ultrasound and other imaging services, but excluding screening mammography and, for services furnished on or after January 1, 2005 , diagnostic mammography), and
(ii)#
effective for procedures performed on or after October 1, 1989 , diagnostic procedures (as defined by the Secretary) described in section 1395x(s)(3) of this title (other than diagnostic x-ray tests and diagnostic laboratory tests),
the amount determined under subsection (n) or, for services or procedures performed on or after January 1, 1999 , subsection (t);