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Between 2005 and 2011, the proportion of opioid treatment programs offering HCV testing increased but largely because of increases in off-site referrals rather than on-site testing. HCV testing availability was higher in opioid treatment programs affiliated with a hospital and those receiving federal funds. Opioid treatment programs providing both methadone and buprenorphine were more likely to offer any HCV testing, whereas opioid treatment programs providing only buprenorphine treatment were less likely to offer on-site testing. HCV testing availability was associated with more favorable staff-to-client ratios. <\/jats:p><jats:p> Conclusions. The increasing use of off-site referrals for HCV testing in opioid treatment programs likely limits opportunities for case finding, prevention, and treatment. Declines in federal funding for opioid treatment programs may be a key determinant of the availability of HCV testing in opioid treatment programs. <\/jats:p>","DOI":"10.2105\/ajph.2013.301827","type":"journal-article","created":{"date-parts":[[2014,5,13]],"date-time":"2014-05-13T20:05:17Z","timestamp":1400011517000},"page":"e75-e82","source":"Crossref","is-referenced-by-count":25,"title":["Determinants of the Availability of Hepatitis C Testing Services in Opioid Treatment Programs: Results From a National Study"],"prefix":"10.2105","volume":"104","author":[{"given":"Jemima A.","family":"Frimpong","sequence":"first","affiliation":[{"name":"Jemima A. Frimpong and Thomas D\u2019Aunno are with the Department of Health Policy and Management, Mailman School of Public Health, Columbia University, New York, NY. Lan Jiang is with the Providence Veterans Affairs Medical Center, Providence, RI."}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Thomas","family":"D\u2019Aunno","sequence":"additional","affiliation":[{"name":"Jemima A. Frimpong and Thomas D\u2019Aunno are with the Department of Health Policy and Management, Mailman School of Public Health, Columbia University, New York, NY. Lan Jiang is with the Providence Veterans Affairs Medical Center, Providence, RI."}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Lan","family":"Jiang","sequence":"additional","affiliation":[{"name":"Jemima A. Frimpong and Thomas D\u2019Aunno are with the Department of Health Policy and Management, Mailman School of Public Health, Columbia University, New York, NY. 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