A pharmacy technician is filling a prescription for insulin for a patient who receives Medicare benefits. Which of the following Medicare programs should be billed for this prescription?

Medicare Part D is specifically designed to provide prescription drug coverage. Patients enrolled in Medicare have the option to obtain drug coverage through this program, which specifically includes medications like insulin. Given that insulin is a commonly prescribed medication for diabetes, it falls under the categories of drugs covered by Part D. Therefore, when a pharmacy technician fills a prescription for insulin for a patient receiving Medicare benefits, it is appropriate to bill Part D.

Medicare Part A generally covers inpatient hospital services, while Part B covers outpatient services and certain physician services but does not typically cover most prescription drugs. Part C, also known as Medicare Advantage, includes both Part A and Part B benefits and may offer additional coverage, including drug coverage, but the standard billing for insulin would go through Part D specifically. Thus, billing for insulin under Part D aligns with the intended use and coverage provided by the program.