Following up, it appears that insurers can use vaccination status in pricing healthcare costs shouldered by the insured. Several insurers have already begun to do this (Aetna and UnitedHealthcare). Coverage isn’t denied, nor are premiums raised, but it’s done through no longer waiving copayments from COVID treatment costs.

https://khn.org/news/article/analysis-dont-want-a-vaccine-be...

https://khn.org/news/article/time-to-say-goodbye-to-some-ins...