42 C.F.R. § 412.170
As used in this section and § 412.172 , the following definitions apply:
Applicable hospital is a hospital described in section 1886(d)(1)(B) of the Act (including a hospital in Maryland that is paid under the waiver under section 1814(b)(3) of the Act and that, absent the waiver specified by section 1814(b)(3) of the Act, would have been paid under the hospital inpatient prospective payment system) as long as the hospital meets the criteria specified under § 412.172(e) .
Applicable period is, unless otherwise specified by the Secretary, with respect to a fiscal year, the 2-year period (specified by the Secretary) from which data are collected in order to calculate the total hospital-acquired condition score under the Hospital-Acquired Condition Reduction Program.
CDC NHSN HAI stands for Centers for Disease Control and Prevention National Healthcare Safety Network healthcare-associated infection measures.
CMS PSI 90 stands for Patient Safety and Adverse Events Composite for Selected Indicators (modified version of PSI 90).
Hospital-acquired condition is a condition as described in section 1886(d)(4)(D)(iv) of the Act and any other condition determined appropriate by the Secretary that an individual acquires during a stay in an applicable hospital, as determined by the Secretary.
42 C.F.R. §412.170