The Medicare RBRVU $($Resource Based Relative Value Unit$)$ Feefor$-$ Service schedule: a$.$ is increasingly used by commercial $($private$)$ insurers which manage employee health insurance plans, and by self$-$insured employersas the basis for contractual payments for physician services b$.$ Considers the different CPT$-4$ codespecific amounts of time, physician experience and training, and physician skill associated with performing different procedures c$.$ Is based on the hospital chargemaster d$.$ Does NOT consider the cost of managing a physician office practice. e$.$ a and b