As of January 1, 2026, Aetna no longer offers ACA marketplace plans. Anthem is now the only option between the two for ACA health insurance coverage. Anthem operates in 13 states and offers HMO, EPO, POS and PPO plans, with an average Quality Rating System score of 83.3.
When we reviewed Aetna and Anthem across all three health insurance product lines in our analysis, the clearest pattern was coverage breadth. Aetna operates in more states, carries more plan types and earns higher CMS Star Ratings across every Medicare Advantage plan category. Anthem's two edges are PPO monthly premiums and HMO-POS out-of-pocket limits. For ACA coverage, Anthem is now the sole option.
Anthem's average ACA denial rate of 22.7% is nearly five percentage points above the national average of 18%. On a plan you're choosing partly because the premiums are manageable, a denial rate 4.7 percentage points above average means more claims rejected at the point of care. In my view, for anyone with a chronic condition or regular prescriptions, it's the number that should be driving the ACA decision, not premium alone.




