Ind. Code § 16-21-17-0.5
As used in this chapter, "weighted average negotiated charge" means the amount determined in STEP SIX of the following formula with respect to a particular procedure:
STEP ONE: For each insurer with whom the hospital or an ambulatory outpatient surgical center negotiates a charge for a particular procedure, determine the percentage of the hospital's patients or the ambulatory outpatient surgical center's patients insured by the insurer in the previous calendar year rounded to a whole percentage.
STEP TWO: Multiply each percentage determined under STEP ONE by one hundred (100) and express the results as whole numbers so that the sum of the percentage points determined under STEP ONE is one hundred (100).
STEP THREE: For a particular procedure, determine the amount of the negotiated charge for the procedure for each insurer described in STEP ONE.
STEP FOUR: For each insurer described in STEP ONE, multiply the STEP THREE amount determined for a particular procedure by the result determined under STEP TWO for that insurer.
STEP FIVE: For a particular procedure, determine the sum of the amounts determined under STEP FOUR for all of the insurers described in STEP ONE with respect to that procedure.
STEP SIX: For a particular procedure, determine the quotient of:
As added by P.L.93-2020, SEC.3.