It is illegal for insurance companies to cancel your coverage simply because you made an honest mistake on your application for health insurance. These protections apply to all health plans, whether you get coverage through your employer or buy it yourself.
Your insurance company can still cancel your coverage if you purposely included false or incomplete information on your insurance application or if you don't pay your premiums on time.
Pennsylvania requires insurance companies to provide at least a 30-day grace period before they can cancel your coverage for the reasons stated above. If you receive advance premium tax credits, you have a 90-day grace period before your coverage can be terminated.