CMS launches 340B claims data repository

The Centers for Medicare & Medicaid Services' 340B Part D claims data repository became available Oct. 1 for voluntary data submissions. While data submissions will remain voluntary for now, the agency has proposed making data submissions mandatory starting Jan. 1, 2027. CMS has multiple resources available to support 340B entities and their third-party administrators with data submissions, including a user guide, companion guide, fact sheet and an FAQ.