Medicare Part D in New York: A Prescription Drug Coverage Checklist

By HCA Insurance Editorial Team · Updated August 28, 2026

Part D is a medication-by-medication comparison. A low premium does not by itself indicate a lower total cost. The plan needs to be evaluated against every drug you take, the pharmacy you use, the restrictions that apply and the coverage path you are considering.

How you receive Medicare drug coverage

Medicare Part D is optional prescription-drug coverage offered through Medicare-approved private plans. If you have Original Medicare, you may choose a stand-alone Part D plan. Most Medicare Advantage plans include drug coverage; if you join a Medicare Advantage plan without drug coverage, you usually cannot add a separate Part D plan. Confirm this before enrolling.

Build a complete medication list

Before using a comparison tool, gather the exact drug name, dose, form, frequency and quantity for every prescription. Include preferred pharmacies, mail-order preferences, specialty medications and upcoming changes your prescriber expects. Your list should be specific enough to identify the exact product rather than only its drug class.

Check these items for every drug

• Formulary status and tier: confirm the drug is covered and identify its current tier.
• Coverage restrictions: check for prior authorization, step therapy or quantity limits.
• Pharmacy pricing: compare in-network, preferred, standard and mail-order pharmacy options where available.
• Out-of-pocket cost: estimate the full-year cost, not only the monthly plan premium.
• Plan documents: read the formulary, Evidence of Coverage and annual notice of change for the plan year you are considering.

Do not overlook creditable coverage and late enrollment

If you delay Part D, ask your current plan for a written statement about whether its prescription coverage is creditable—meaning it is expected, on average, to pay at least as much as standard Medicare drug coverage. Going 63 or more days without Part D or other creditable coverage after your Initial Enrollment Period can result in a late-enrollment penalty. Eligibility for Extra Help or other circumstances can change the analysis; verify your individual situation.

Review Part D every year

Plans can change their premiums, formularies, pharmacy networks and cost-sharing from one year to the next. During Medicare Open Enrollment, October 15 through December 7, review your current medications and plan materials against the coming year’s options. Update the list whenever a prescription, doctor or pharmacy changes rather than waiting for a renewal notice.