What If I Already Have Health Insurance?
If you already have health insurance through your employer, a private company, or under a government program (Medicare, Medicaid, or veteran coverage) for the entire year, there is no need to change anything. However, if you have private health insurance (not through an employer), you may wish to check out the Health Insurance Marketplace anyway, in case you can find a better deal. You can get started at HealthCare.gov.
You should update your 2015 Marketplace information all year by reporting any changes to your income and household. There will be instructions for updating your information on HealthCare.gov.
You need to make sure that you have the minimum essential coverage as defined by the Affordable Care Act. The minimum essential coverage includes individual policies purchased on the Health Insurance Marketplace, job-based coverage, Medicare, Medicaid, CHIP, TRICARE and others. See more about this on HealthCare.gov.