At the fellow level is variable I imagine since you're likely in an area saturated with trainees and attendings and the labor pool is more plentiful. A hospital allowing non board certified CCM practice may be more desperate either due to bad work conditions (and have high pay) or due to low pay. My personal experience after reaching out to over a dozen hospitals was that none were interested in fellows moonlighting in the ICU except one that paid laughably low (120/hr 1099).