"What we don't want the Iraqis to do is just take a security-centric approach to this," the official said.
"What that means is making sure they have information in terms of where people are located, where it's coming from, where the funding is coming from, and that's something we can do pretty effectively," the official continued. "So we're trying to help them now as best we can, and that's going to be a key topic of discussion over the course of the visit."
Although gains have been made to restore Iraq's economy after years of war, occupation and violence, crushing poverty remains pervasive, and the economy remains fragile.
Nearly 2 million Iraqis sometimes lack enough to eat, Mladenov said. Infant mortality remains high, as does illiteracy and unemployment.
And the violence threatens to derail the country's oil production, which drives much of its economy.
According to Iraq's Oil Ministry, exports fell to 62.1 million barrels in September, from a peak of 79 million barrels in April, when the worst of the violence began.
A continued slide could threaten the government's ability to pay for increased security and economic development efforts.
The oil sector provides more than 90 percent of government revenue and four-fifths of its foreign exchange earnings, according to the CIA.