Variations in Cataract Extraction Rates in Medicare Prepaid and Fee-for-Service Settings
Caroline Lubick Goldzweig, MD, MSPH; Brian S. Mittman, PhD; Grace M. Carter, PhD; Tenzing Donyo, MBA; Robert H. Brook, MD, ScD; Paul Lee, MD, JD; Carol M. Mangione, MD, MSPH
—To compare rates of cataract extraction in 2 prepaid health settings and in traditional fee-for-service (FFS) settings.
—A cross-sectional analysis using 1993 health maintenance organization (HMO) Medicare claims and encounter files, the Health Care Financing Administration (HCFA) 5% Medicare Part B provider/supplier file, and the HCFA October 1992 100% Medicare population file.
—Southern California Medicare FFS settings and the staff-model and independent practice association (IPA) plans of a large California HMO.
—1993 Medicare beneficiaries aged 65 years and older. The study included 43 387 staff-model HMO enrollees, 19 050 IPA enrollees, and 47 150 FFS beneficiaries (a 5% sample of all Southern California FFS
Obstbaum SA. Should Rates of Cataract Surgery Vary by Insurance Status? Arch Ophthalmol. 1997;115(7):917–918. doi:10.1001/archopht.1997.01100160087017
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