Data as of July 2008.
Data include all licensed HMOs which may include Medicaid and/or Medicare only HMOs.
State penetration calculated by InterStudy using state population from the U.S. Census Bureau as of July 2008.

For more detailed HMO or PPO information for a specific state, MSA, or county, contact Health Leaders at http://www.healthleaders-interstudy.com/.

Healthleaders, Inc., Special Data Request, March 2009.

HMO: An entity that offers prepaid, comprehensive health coverage for both hospital and physician services with specific health care providers using a fixed structure or capitated rates. HMO enrollment includes enrollees in both traditional HMOs and HMO point-of-service (POS) plans through: group/commercial plans, Medicare, Medicaid, the Federal Employees Health Benefits Program, direct pay plans and unidentified HMO products.
NA: Data not available.