The Centers for Medicare and Medicaid Services released official 2027 Medicare Advantage star ratings data on October 9, 2026.^[3] Plans belonging to ACHP earned an average 4.23 stars, compared to 3.96 stars for non-member carriers.^[1] 87% of enrollees in ACHP member contracts were in plans earning at least 4 stars, versus 69% for enrollees outside the group.^[4] ACHP member plans outperformed non-members on 92% of commercial, 85% of Medicaid, and 93% of Medicare measured quality metrics.^[8] Peak Health and Kaiser Permanente, both ACHP members, received the maximum 5 star rating in this cycle.^[6] Humana shares rose 15% in premarket trading Friday. 95% of the insurer's Medicare Advantage members will be in 4+ star rated plans for 2027.^[5] Analysts named Humana the biggest beneficiary of the new ratings.^[7] UnitedHealth stock rallied 3.5% in morning trading following the public release of the ratings.^[2]