A month ago, I posited that the impressive drive to vaccinate all U.S. adults is also a golden opportunity to insure the uninsured.
Vaccinations are free to all, but in the vaccination process the uninsured must identify themselves as such. An estimated 11 million uninsured are eligible for marketplace subsidies (now often zeroing out premiums entirely), and another 7 million for Medicaid. The emergency Special Enrollment Period launched by the Biden administration on February 15, running through August 15, opens the enrollment door to anyone who's uninsured and lacks access to other coverage -- and coincides with the vaccination drive.
As noted in the prior post, while some assister groups have done outreach at vaccination sites, and at least a couple of states have supported such efforts to some degree, the initiative has come mainly from the assisters themselves (generally operating on a shoestring through the lean Trump years), not government agencies, and efforts have been scattered.
That is accurate. CMS confirmed to me that while the agency gives assister groups vaccine information to disseminate, "CMS...has not promoted or organized any official Marketplace outreach or enrollment events in conjunction with any COVID-19 vaccination site or event."

