New investment in Medicaid Management Information Systems by state and local governments will drive growth in annual spending on health IT, according to a study released by market research firm Input inc. Input predicted the MMIS market will hit $4.1 billion in 2012, accounting for $2.6 billion of the annual growth in the health IT market of $3.9 billion. Overall the health IT market will expand at 8.6 percent annually, according to Input.