Part B | definition of part B by Medical dictionary
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part B Managed care A component of the Medicare reimbursement system–US that provides supplementary payments for medical services and supplies that are not covered under part A; part B is voluntary, covers physician fees and individual provider services; it is financed partly by monthly premiums paid by enrollees and partly by the federal government. See Medicare, Part A, Participation, TEFRA. Cf Medicaid.