Final answer:
Mr. Singh can enroll in a stand-alone prescription drug plan to receive drug coverage while remaining under Original Fee-For-Service Medicare for other healthcare needs.
Step-by-step explanation:
Mr. Singh can enroll in a stand-alone prescription drug plan (Part D) and continue to be covered for Part A and Part B services through Original Fee-For-Service Medicare. This option allows beneficiaries to add prescription drug coverage to the traditional Medicare coverage without joining a Medicare Advantage plan. It's essential for Mr. Singh to understand that these plans are separate from the hospital and medical coverage offered under Parts A and B, and that a monthly premium is typically required for a Part D plan.