  
	
  
Do HMOs Make a Difference?
Introduction
Winter 1999/2000 
Inquiry, vol.36, no.4 (Winter 1999/2000): 374-377 
 James D. Reschovsky, Peter  Kemper 
 he study presented in this and the following five papers analyzes how
    health maintenance organizations (HMOs) affect privately insured individuals access
    to health care, use of services, and assessments of care. Using a common data source and
    methodology, the study examines differences in a braod range of measures between HMOs and
    other types of insurance, controlling for health status and an extensive set of other
    individual characteristics and market location. HMO/non-HMO differences also are examined
    across population subgroups defined by health status, income, race and age. Data come from
    the Community Tracking Study Household Survey, a recent, large national survey. Findings
    show that a persons type of health insurance coverage has little effect on the
    likelihood of unmet or delayed needs for medical care in the aggregate, but the types of
    access problems faced by HMO and non-HMO enrollees differ. HMO enrollees are less likely
    to face financial barriers to care, but more likely to face barriers related to the
    organization of care delivery. HMO enrollees use more ambulatory and preventive care, but
    results show no differences in hospital, surgery, and emergency room use. Compared with
    other types of insurance, physician visits under HMOs are more likely to be to primary
    care physicians than to specialists. Finally, across nearly all measures of patients
    satisfaction, ratings of their last doctors visit, and trust in their physicians,
    HMO enrollees assessments of care are lower than those of people not in HMOs. Across
    all measure, the study finds few subgroup differences. 
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