Medicare Part D in Mississippi: What's New for 2027

Part D is how Medicare covers prescriptions — and for 2027, a $2,400 yearly out-of-pocket cap changes the math for anyone with high drug costs. This guide explains how it works for people in Mississippi, in plain language.

Medicare coverage isn't uniform across Mississippi. Plans are approved county by county, so what's on offer can shift from one neighboring area to the next — the reason we break the state down by city below.

About 45% across Mississippi have chosen Medicare Advantage over Original Medicare, though that share swings a lot depending on where you live.

You'll find the carriers operating in Mississippi, how the parts of Medicare relate, the 2027 figures everyone shares, when you can enroll, where to get unbiased help, and a guide for every city. Educational only, with no rankings.

How Part D drug coverage works

Medicare Part D covers prescription drugs. You can get it two ways: as a stand-alone plan added to Original Medicare, or built into a Medicare Advantage plan that includes drug coverage. Either way, the basic structure is set by Medicare and the plans are run by private insurers.

For 2027, coverage moves through three phases — a deductible phase (no more than $700), an initial coverage phase, then a catastrophic phase. The old 'donut hole' gap is gone, and an annual out-of-pocket cap limits what you pay for covered drugs. An optional Medicare Prescription Payment Plan also lets you spread those costs across the year.

This guide explains those rules as they apply in Mississippi. Specific drug lists and pricing vary by plan, so for plan-by-plan detail we point you to Medicare's Plan Finder rather than ranking plans ourselves.

The 2027 numbers, from shared to plan-specific

Start with what's fixed for everyone. The standard Part B premium is $202.90 per month in 2026 (2026 amount; 2027 figure will be posted when CMS releases it), and Part A is premium-free for most people who paid Medicare taxes long enough while working.

On the drug side, Part D has real guardrails for 2027: a deductible capped at $700 and, a hard $2,400 ceiling on your out-of-pocket costs for covered prescriptions — the old coverage gap is gone.

Higher earners pay more for Parts B and D through an income-related adjustment called IRMAA, which for 2026 starts above $109,000 in annual income for an individual and is based on your 2024 tax return. Most people fall below that line and pay the standard amounts. The 2027 brackets will be posted when CMS releases them.

Everything past that is plan-specific: the premiums, copays, and coverage details of an individual Advantage or Medigap plan change from plan to plan and year to year. Rather than quote or rank those, we point you to Medicare's Plan Finder and a licensed agent for your exact numbers.

When you can enroll or make changes

Medicare's enrollment windows are federal — the same nationwide — so the timing below applies wherever you live.

Your first window (IEP). When you're new to Medicare, your Initial Enrollment Period is the 7-month window around your 65th birthday month. Signing up on time helps you avoid late penalties that can follow you for years.

Annual Enrollment Period (AEP). Each fall, from October 15 – December 7, anyone with Medicare can join, switch, or drop a Medicare Advantage or Part D plan. Changes take effect January 1.

Medicare Advantage Open Enrollment. From January 1 – March 31, if you're already in an Advantage plan you get one chance to switch plans or return to Original Medicare.

Special Enrollment Periods can also open after certain life events, like moving or losing other coverage. The interactive calendar further down lays the year out visually.

Where to get free, unbiased help near Mississippi

Good Medicare help exists and it's free — you don't have to figure this out solo or pay for guidance.

For official specifics and the Plan Finder tool, go straight to Medicare.gov or 1-800-MEDICARE (TTY 1-877-486-2048). And a licensed agent can compare options and handle the paperwork with you.

One note on who we are: MyMedicarePlans.org is an independent, privately owned educational resource — not Medicare, not a government agency, and not affiliated with one. Our job is to help you get oriented, then hand you off to the official sources and licensed professionals for plan decisions.

Mississippi cities

Pick your city for the county-level picture, the companies active in your area, and local guides: