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Using a difference-in-differences approach that compares network breadth across provider specialties and market segments within the same state, we investigated the association between three Medicaid policies and the breadth of MMC networks for buprenorphine prescribers: Medicaid expansion, substance use disorder (SUD) network adequacy criteria, and SUD carveouts. We found that both Medicaid expansion and SUD network adequacy criteria were associated with substantially increased breadth in buprenorphine-prescriber networks in MMC. In both cases, we found that the associations were largely driven by increases in the network breadth of primary care physician prescribers. Our findings suggest that Medicaid expansion and SUD network adequacy criteria may be effective strategies at states\u2019 disposal to improve access to buprenorphine.<\/jats:p>","DOI":"10.1177\/10775587231167514","type":"journal-article","created":{"date-parts":[[2023,4,21]],"date-time":"2023-04-21T05:47:30Z","timestamp":1682056050000},"page":"423-432","update-policy":"https:\/\/doi.org\/10.1177\/sage-journals-update-policy","source":"Crossref","is-referenced-by-count":8,"title":["State Policy and the Breadth of Buprenorphine-Prescriber Networks in Medicaid Managed Care"],"prefix":"10.1177","volume":"80","author":[{"ORCID":"https:\/\/orcid.org\/0000-0003-3583-5588","authenticated-orcid":false,"given":"Mark K.","family":"Meiselbach","sequence":"first","affiliation":[{"name":"Johns Hopkins University, Baltimore, MD, USA"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-0618-0626","authenticated-orcid":false,"given":"Coleman","family":"Drake","sequence":"additional","affiliation":[{"name":"University of Pittsburgh, PA, USA"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Jane M.","family":"Zhu","sequence":"additional","affiliation":[{"name":"Oregon Health & Science University, Portland, USA"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Brynna","family":"Manibusan","sequence":"additional","affiliation":[{"name":"Oregon Health & Science University, Portland, USA"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Dylan","family":"Nagy","sequence":"additional","affiliation":[{"name":"University of Pittsburgh, PA, USA"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Mark J.","family":"Sorbero","sequence":"additional","affiliation":[{"name":"RAND Corporation, Pittsburgh, PA, USA"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Brendan","family":"Saloner","sequence":"additional","affiliation":[{"name":"Johns Hopkins University, Baltimore, MD, USA"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Bradley D.","family":"Stein","sequence":"additional","affiliation":[{"name":"RAND Corporation, Pittsburgh, PA, USA"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-8403-9612","authenticated-orcid":false,"given":"Daniel","family":"Polsky","sequence":"additional","affiliation":[{"name":"Johns Hopkins University, Baltimore, MD, USA"}],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"179","published-online":{"date-parts":[[2023,4,21]]},"reference":[{"key":"bibr1-10775587231167514","unstructured":"Adelberg M., Frakt A., Polsky D., Strollo M. 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