IEVS is a system that compares the income that an individual reports when they apply for Health First Colorado (Colorado’s Medicaid Program) or Child Health Plan Plus (CHP+) with the income employers report to the Colorado Department of Labor and Employment for all of their employees. If there is a big difference between an individual’s self-reported income and the employer-reported income in IEVS, an individual may be asked to provide an explanation of why the numbers are different, and/or to provide proof of their income.