; and (II) the performance category described in paragraph (5)(B), discharges occurring during such applicable data collection period that are with respect to such risk category and that are not identified as potentially-avoidable readmissions under the methodology selected under paragraph (6)(A). (iv) Documented The term documented means, with respect to a readmission or discharge (as applicable) of an individual entitled to benefits under part A, that the circumstances of such readmission or discharge are documented in the medical record of the individual. (H) Exception to use of nationwide-average rates In the case that the methodology selected under paragraph (6)(B) for such performance category does not meet the criteria described in clause (iii) of such paragraph, and that there is a systematic negative bias in the payment adjustments against hospitals treating a disproportionate share of full-benefit dual eligible individuals (as defined in section 1935(c)(6)), the Secretary shall— (i) develop groups of hospitals based on the overall proportion of inpatients in such hospitals who are full-benefit dual eligible individuals (as defined in section 1935(c)(6)); (ii) determine, with respect to each such group and each risk category specified under paragraph (6)(B), the ratio of— (I) the number of discharges occurring among (or, in the case of the performance category described in paragraph (5)(D), the total amount of standardized post acute care episode expenditures made with respect to) all applicable hospitals in such group during such applicable data collection period that are with respect to such risk category and that involve the potentially-avoidable outcomes in such performance category