There are several types of treatments and medical providers for which Medicare Part B pays 100% of the approved charges rather than the usual 80%, and to which the yearly Part B deductible does not apply. In these categories, you are not required to pay the regular 20% coinsurance amount.
Mulei-Cell Array Formulas. A multi cell array formula is used when the result of the formula is a range that takes up more than one cell. Some Excel functions are required to be entered this way as multi-cell array formulas making use of Ctrl+Shift+Enter, the most common of which is TRANSPOSE.
Answer: In cell C1, you can use the following Excel formula with 3 nested IF functions: =IF(B1=0,A1/2, IF(B1=1,(A1/2)*0.2, IF(D1=1,(A1/2)-5,))) Please note that if none of the conditions are met, the Excel formula will return  as the result.