The Costs of A Medicare Prescription Drug Benefit

Dana P. Goldman, RAND
Geoffrey F. Joyce, RAND
Jesse Dylan Malkin, RAND

Abstract

Medicare does not have an outpatient prescription drug benefit. Recently, there has been renewed interest in adding a prescription drug benefit to the program. In this paper, we present a microsimulation model to predict drug expenditures in 2001 for a representative cohort of Medicare beneficiaries under the status quo and three different plans: (1) a catastrophic plan modeled on the Medicare Catastrophic Coverage Act (PL 100-360), which was passed in 1988 but repealed one year later after higher-income Medicare beneficiaries protested new premiums, (2) a zero-deductible plan that caps out-of-pocket expenses at $4,000 per year, and (3) a zero-deductible plan that does not cap out-of-pocket expenses. We use data from a representative sample of Medicare Part B beneficiaries from the 1995 Medicare Current Beneficiary Survey (MCBS) Cost and Use file. Under the status quo, drug expenses average $1,459 per beneficiary, out-of-pocket costs average $646, and 8.2% of the population has very high expenses (defined as more than $2,000 out-of-pocket for drugs). Under a catastrophic plan, average annual drug expenses are $1,344, out-of-pocket costs are $645, and 6.8% of beneficiaries have very high expenses. Under a zero-deductible plan that does not cap out-of-pocket expenses average annual drug expenses are $1,395, out-of-pocket expenses are $459, and 5.3% of beneficiaries would have very high expenses. Under a zero-deductible plan that caps out-of-pocket expenses at $4,000 per year, average annual drug expenses are $1,414, out-of-pocket expenses are $442, and 5.5% of beneficiaries have very high expenses.