TABLE 1.

Average Group Health Care Costs in Year 2 for Model Health Plan Cohorts, by Share of Enrollees With Chronic Mental Health Conditions and Chronic Medical Conditions^a

Morbidity Group	Proportion With Condition (%)	Average Group Health Care Costs ($, in Millions)
Chronic mental health condition
Low morbidity	1.6	141.0
Moderately low morbidity	5.6	151.8
Moderately high morbidity	9.6	157.2
High morbidity	13.6	168.0
Pooled cohorts	7.6	154.5
Chronic medical condition
Low morbidity	22.6	140.1
Moderately low morbidity	26.6	150.7
Moderately high morbidity	30.6	158.4
High morbidity	34.6	168.9
Pooled cohorts	28.6	154.5

^aHealth plan cohorts were created by simulating enrollment for 100 health plans, each with 50,000 random members in 2006. We reassigned a predetermined number of individuals to plans based on the presence of chronic mental health conditions to create four plan risk levels with 25 plans in each: low, moderately low, moderately high, and high morbidity. We used an analogous process to create four plan cohorts by share with a chronic medical condition. Average health care costs are for 2007, in 2007 dollars.