The annual Milliman Medical Index (MMI) measures the total cost of healthcare for a typical family of four covered by a preferred provider plan (PPO). The 2011 MMI cost is $19,393, an increase of $1,319, or 7.3% over 2010. Even though the rate of increase is slowing from prior years, it has taken fewer than nine years for such costs to more than double. In 2002, the cost of healthcare for the typical family of four was $9,235.