How to Choose a Medicare Part D Plan in Maryland: Drugs, Pharmacies and Enrollment

The most useful way to choose a Medicare Part D plan is to compare your exact prescriptions at your preferred pharmacies. A low premium or familiar insurer does not tell you whether a plan covers your drugs affordably. I would build the medication list first and compare the plans second.

This guide focuses on selecting coverage in Maryland. For current-year dollar limits and payment-plan details, use the separate 2026 Part D costs guide. When comparing coverage for a different year, use that year’s plan documents and prices.

First, identify how you will receive drug coverage

You can generally add a stand-alone Part D plan to Original Medicare, including when you have Medigap. Most Medicare Advantage plans include drug coverage within the plan.

Do not add a stand-alone drug plan to an existing Medicare Advantage plan without checking the consequences. With many HMO and PPO plans, that enrollment can disenroll you from the health plan. Medicare’s guide to choosing drug coverage explains the exceptions.

Prepare an exact prescription list

• Drug name, including whether you use the brand or generic.

• Strength and formulation, such as extended-release versus a standard tablet.

• Quantity used each month and how often you refill.

• Preferred retail pharmacy and any mail-order preference.

• Any coverage restrictions or exceptions already approved by your current plan.

A similar-looking drug name or strength can produce a different result. Compare the product actually prescribed rather than substituting a medication on your own. If a prescriber expects a change, ask what needs to be checked before choosing coverage.

Read the formulary and restrictions

The formulary is the plan’s covered-drug list. Confirm each medication, its tier, and whether prior authorization, step therapy, or quantity limits apply. A drug appearing on the list does not mean every fill is automatically approved.

If a needed drug is missing, discuss alternatives with the prescriber and ask about the plan’s exception process before enrolling. My guide to Part D exceptions and appeals explains the next steps when coverage is refused.

Compare the pharmacy and annual total

Price the same drugs at the pharmacies you would actually use. Preferred network pharmacies, other network pharmacies, and mail order can have different costs. Verify that the location is in the plan’s current network.

Compare the estimated annual premium plus prescription spending, not the premium alone. A plan with a higher premium may cost less overall for a particular drug list. The estimate can change if your prescriptions, quantities, pharmacy, or coverage year changes.

Check the enrollment window and effective date

Choosing a plan and being allowed to enroll are separate questions. Fall Medicare Open Enrollment runs October 15 through December 7 for changes generally effective January 1. Other enrollment opportunities depend on your situation. Use Medicare’s Open Enrollment guidance and confirm the intended start date.

If you are losing employer coverage, check drug-coverage deadlines separately from Part B. Keep written proof of creditable coverage and avoid assuming that the Part B enrollment period also applies to prescriptions.

Your final check before submitting

• Every current prescription has been entered correctly.

• The pharmacy is the location you intend to use.

• Restrictions and any uncovered drugs have been discussed.

• The total is for the correct coverage year.

• You understand the effective date and how the enrollment affects existing coverage.

• You have saved the comparison and official plan documents.

Review the Annual Notice of Change checklist when renewing coverage. A plan that worked this year can change next year.

I help compare options from the carriers I represent. For an independent public review, Montgomery County SHIP offers counseling separate from Forest Brook Financial.

Forest Brook Financial is not affiliated with or endorsed by Medicare or any government agency. Formularies, pharmacies, costs, coverage restrictions, enrollment rights, and plan availability vary by plan, service area, year, and circumstances.