OBJECTIVES: To describe preventive care screening rates among Medicaid-insured women ages 40-65 with respect to utilization of screening mammography.  METHODS: The Truven Health MarketScan Medicaid Multi-State Database was used to identify women ages 40-65 enrolled in Medicaid from 2009 through 2013.  The data source includes administrative claims data from ~12 geographically-disperse Medicaid programs. Women were required to be continuously enrolled for the entire 5-year study period.  Women were stratified according to the receipt of a screening mammogram to measure the coincident prevalence of Pap screening or colonoscopy/sigmoidoscopy. A subset analysis was conducted to describe the prevalence of screening mammography and subsequent breast cancer diagnosis in women receiving a diagnostic mammogram.  RESULTS: A cohort of 82,875 women ages 40-65 had continuous enrolment from 2009 through 2013. Of these women, 43.8% had at least one screening mammogram during the study period, of which 52.1% had at least two and 26.7% had at least three.  The average annual mammography screening rate increased steadily from 14.7% in 2009 to 18.4% in 2013.  Women who received a screening mammogram were more likely to undergo other preventive screening than those who did not: Pap test (65.8% versus 30.2%), colonoscopy/sigmoidoscopy (49.5% versus 22.8%).  Overall, 20.7% of women had a diagnostic mammogram during the study period, which was more prevalent among women with a screening mammogram (31.3% versus 12.4%). The rate of breast cancer diagnosis differed between women who received both screening and diagnostic mammography versus women who received only diagnostic mammography (4.2% versus 10.4%). Approximately one-third of all women (32.9%) did not receive a screening mammogram, Pap, or colonoscopy/sigmoidoscopy during the study period. CONCLUSIONS: Preventive care screening rates among Medicaid-insured women were low; fewer than one-half of eligible women received a screening mammogram during the five-year period.  Women not receiving screening mammography were less likely to access other preventive screening services.