The amount payable for inpatient hospital services or inpatient critical access hospital services furnished an individual during any spell of illness shall be reduced by a deduction equal to the inpatient hospital deductible or, if less, the charges imposed with respect to such individual for such services, except that, if the customary charges for such services are greater than the charges so imposed, such customary charges shall be considered to be the charges so imposed. Such amount shall be further reduced by a coinsurance amount equal to—
(A)#
one-fourth of the inpatient hospital deductible for each day (before the 91st day) on which such individual is furnished such services during such spell of illness after such services have been furnished to him for 60 days during such spell; and
(B)#
one-half of the inpatient hospital deductible for each day (before the day following the last day for which such individual is entitled under section 1395d(a)(1) of this title to have payment made on his behalf for inpatient hospital services or inpatient critical access hospital services during such spell of illness) on which such individual is furnished such services during such spell of illness after such services have been furnished to him for 90 days during such spell;
except that the reduction under this sentence for any day shall not exceed the charges imposed for that day with respect to such individual for such services (and for this purpose, if the customary charges for such services are greater than the charges so imposed, such customary charges shall be considered to be the charges so imposed).