Hundreds of thousands of people who signed up for Medicaid months ago still don't have coverage, a problem that could worsen when insurance sign-ups under the ACA begin next month. California and Tennessee are facing lawsuits from residents who say they have seen long delays for coverage after signing up for Medicaid. The delays stem from various technical problems and the volume of applications states must process. Some applications that come through HealthCare.gov and are transferred to the states still have problems with data accuracy. Some states' information-technology systems weren't prepared for the flood of applications that began when the heath law expanded Medicaid eligibility. About a dozen states, including Illinois, Indiana, Georgia and North Carolina, have struggled with delays. CMS officials said most states have ended or reduced their backlogs and are on a path to ensure timely enrollment.