You have two options if you lose health insurance coverage provided by your employer. You can sign up for the COBRA coverage or visit an insurance plans aggregator to buy a plan suitable to your lost job health insurance needs. The COBRA continuation plan allows you to retain your job-based health insurance coverage. Using this option, you can remain on the employee health insurance coverage for a few months after losing your job. Contact your employer to learn more about this feature.
The other option is to buy the health coverage from a marketplace. First learn if you qualify for out of pocket healthcare costs and premium savings. It will be determined based on your income. You may be eligible for Medicaid or other programs. Explore all such options to get your health coverage as soon as possible after you have lost your job-based health plan.