Volume 49 | Number 4 | August 2014

Abstract List

Adam Atherly Ph.D., Karoline Mortensen Ph.D.


The Patient Protection and Affordable Care Act () increases Medicaid physician fees for preventive care up to Medicare rates for 2013 and 2014. The purpose of this paper was to model the relationship between Medicaid preventive care payment rates and the use of Preventive Services Task Force ()–recommended preventive care use among Medicaid enrollees.

Data Sources/Study Session

We used data from the 2003 and 2008 Medical Expenditure Panel Survey (), a national probability sample of the U.S. civilian, noninstitutionalized population, linked to Kaiser state Medicaid benefits data, including the state Medicaid‐to‐Medicare physician fee ratio in 2003 and 2008.

Study Design

Probit models were used to estimate the probability that eligible individuals received one of five ‐recommended preventive services. A difference‐in‐difference model was used to separate out the effect of changes in the Medicaid payment rate and other factors.

Data Collection/Extraction Methods

Data were linked using state identifiers.

Principal Findings

Although Medicaid enrollees had a lower rate of use of the five preventive services in univariate analysis, neither Medicaid enrollment nor changes in Medicaid payment rates had statistically significant effects on meeting screening recommendations for the five screenings. The results were robust to a number of different sensitivity tests. Individual and state characteristics were significant.


Our results suggest that although temporary changes in primary care provider payments for preventive services for Medicaid enrollees may have other desirable effects, they are unlikely to substantially increase the use of these selected ‐recommended preventive care services among Medicaid enrollees.