Approximately 87-percent of Medicaid-eligible Hoosier kids had health insurance coverage in 2014.
The federal evaluation is to determine if transportation costs are preventing access to care.
The federal Centers for Medicare and Medicaid Services will evaluate whether a waiver to HIP 2.0 causes patients to miss appointments.
Critics have argued at one year old, locking HIP 2.0 into state statute is premature.
HIP 2.0 went into effect last February and provides insurance to some low-income Hoosiers.
Some – including supporters of the program – are concerned about the measure’s consequences.
The federal waiver Indiana received earlier this year to operate HIP 2.0 requires the state to hire an independent evaluator for the program.
The expansion of Medicaid through the Affordable Care Act meant record increases in Medicaid enrollment and spending nationwide in the 2015 fiscal year.
More than a dozen health care advocacy groups and insurers sang the praises of the program at a public forum Thursday.
The ad campaign, which runs through the end of the year, will cost the state a little more than $1 million.