Variation in charges for 10 common blood tests in California hospitals: A cross-sectional analysis

  • Hsia R
  • Antwi Y
  • Nath J
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Abstract

OBJECTIVES: To determine the variation in charges for 10 common blood tests across California hospitals in 2011, and to analyse the hospital and market-level factors that may explain any observed variation.

DESIGN, SETTING AND PARTICIPANTS: We conducted a cross-sectional analysis of the degree of charge variation between hospitals for 10 common blood tests using charge data reported by all non-federal California hospitals to the California Office of Statewide Health Planning and Development in 2011.

OUTCOME MEASURES: Charges for 10 common blood tests at California hospitals during 2011.

RESULTS: We found that charges for blood tests varied significantly between California hospitals. For example, charges for a lipid panel ranged from US$10 to US$10 169, a thousand-fold difference. Although government hospitals and teaching hospitals were found to charge significantly less than their counterparts for many blood tests, few other hospital characteristics and no market-level predictors significantly predicted charges for blood tests. Our models explained, at most, 21% of the variation between hospitals in charges for the blood test in question.

CONCLUSIONS: These findings demonstrate the seemingly arbitrary nature of the charge setting process, making it difficult for patients to act as true consumers in this era of 'consumer-directed healthcare.'

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Authors

  • Renee Y. Hsia

  • Yaa Akosa Antwi

  • Julia P. Nath

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