TOPEKA, Kan. (AP) — Legislative auditors say Kansas’ data is too poorly documented to find out whether the state’s privatized Medicaid plan is working.

The Kansas City Star reports lawmakers directed their independent auditors in April 2017 to determine KanCare’s effect on beneficiaries’ health outcomes. But auditors last month said data reliability issues prevented them from evaluating the health plan’s effectiveness.

Former Gov. Sam Brownback and his successor, Jeff Colyer, say the plan enacted in 2013 has saved Kansas $1 billion while improving care for 400,000 low-income and disabled residents. But provider groups and health care workers say the program is rife with billing problems, secrecy and finance-based decisions.

Kansas Department of Health and Environment Secretary Jeff Andersen says he’s requested more money to hire more employees and strengthen KanCare oversight, including data verification.