HCC V28 Transition Timeline & Phase-In Impact
V28 didn't replace V24 overnight. CMS blends the two models over multiple payment years, which means for the duration of the transition your RAF is a weighted mix of two models. If your pipeline treats the switch as a flag flip, your numbers are wrong. blended_RAF = w_v28 * RAF_v28 + w_v24 * RAF_v24



