2027 plan transition
Medicare Advantage automatically switching your plan for 2027?
An insurer may be allowed to move an eligible member into a designated successor plan without a new application. What happens if you do nothing depends on whether your plan is renewing, being combined, changing its service area, or ending.
Start with your notice
Find the exact 2027 plan before deciding
Check your current plan ID, any proposed successor ID, your residential address, and the wording of the insurer’s letter. A CMS crosswalk records a plan relationship; it does not prove your personal enrollment or eligibility.
- Read the whole letterLook for renewal, consolidation, nonrenewal, and effective-date language.
- Identify the exact plansRecord contract, plan, and segment IDs if available.
- Confirm enrollmentAsk the insurer which plan will cover you on January 1 if you take no action.
What happens if you do nothing?
There is no single answer. The outcome depends on your exact plan, location, and the rules that apply to its transition.
| What is happening | Possible result without action | What to confirm |
|---|---|---|
| Ordinary renewal | Enrollment generally continues in the renewed plan. | 2027 costs, benefits, network, and eligibility. |
| Consolidated renewal | Eligible members may continue in a designated successor without reapplying. | Exact successor, eligibility, and changed terms. |
| Service-area reduction | Members in retained areas may continue; a move in a dropped area needs separate review. | Your residential address, written notice, and whether a limited continuation arrangement applies. |
| Nonrenewal without an applicable successor | Medicare says you generally return to Original Medicare when the MA coverage ends unless you join another MA plan. | End date, election period, and prescription coverage. |
An insurer offering a different plan does not, by itself, mean you are automatically enrolled in it. Ask whether you must actively elect it.
How to check your situation
Read the complete notice
Find the 2026 plan name and ID, any 2027 plan name and ID, effective date, service-area language, and action deadline. An Annual Notice of Change describes next year’s terms; it alone does not establish nonrenewal.
Check the recorded plan relationship
Use the official CMS 2027 plan crosswalk. Our free comparison can show the published transition for supported non-SNP Medicare Advantage plans with Part D. Neither source verifies your individual enrollment.
Confirm with the insurer and Medicare
Call the number on your member card. Ask: “What exact contract, plan, and segment will I be enrolled in on January 1, 2027 if I do nothing? Does my address remain eligible? Must I submit an election?” If the answers conflict, call 1-800-MEDICARE.
Review coverage before accepting a replacement
Confirm your doctors and hospitals with the exact plan and providers. Check medications, pharmacy, cost sharing, medical maximum out-of-pocket, and any ongoing treatment authorizations. An administrative transition does not establish any of these details.
Two CMS records show why classification matters
The October 1, 2026 CMS crosswalk shows different plan-level outcomes. These examples do not establish any member’s personal enrollment or coverage.
Consolidated renewal
Aetna Medicare Signature Care
H0628-017-0 · Franklin County, Ohio
CMS classifies this plan as a consolidated renewal and records H0628-017 as the successor contract and plan ID. The unchanged ID does not prove unchanged benefits.
No recorded successor
Wellcare Simple
H1032-237-0 · Miami-Dade County, Florida
CMS classifies this record as a terminated or nonrenewed contract and does not list a successor. Affected members still need to verify their notices and individual options.
Source: CMS Plan Crosswalk 2027, October 1 release, source rows 567 and 869; checked October 13, 2026.
Enrollment dates and other rights
The regular Medicare enrollment period is October 15–December 7. Medicare lists a separate Special Enrollment Period for a nonrenewed MA contract from December 8 through the last day of February of the next year. Other termination or service-area events can have different rules. Check Medicare’s Special Enrollment Period guide and your notice before relying on a date.
Medicare Advantage Open Enrollment runs January 1–March 31 for people enrolled in Medicare Advantage. If nonrenewal leaves you in Original Medicare on January 1, do not assume that period lets you join a new MA plan; ask Medicare which election period applies.
If you are considering Original Medicare plus Medigap, check Medicare’s Medigap purchasing rules or ask your State Health Insurance Assistance Program. Guaranteed-issue rights depend on the circumstances and are not created merely by a plan consolidation.
Explore published plan information
Check the 2026-to-2027 transition
Select your county and exact 2026 plan to see its CMS crosswalk result and browse supported 2027 alternatives.
Open the public comparisonCoveragePrism does not enroll you, verify your individual eligibility or enrollment, check provider networks or medications, or calculate personal spending. Confirm consequential details with Medicare, the plan, and your providers.
Sources and related guides
42 CFR §422.530 governs MA crosswalks. Also see the CMS 2027 crosswalk, Medicare’s enrollment guidance, and Medigap guidance.
If your notice says coverage is ending, read our plan-ending guide. For changes to a continuing plan’s costs or benefits, read our annual-changes guide.
CoveragePrism is not affiliated with or endorsed by Medicare or the federal government.