Aetna Medicare Signature Plus (PPO) (H5521-218) in 2027
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PPO: about this plan type · Legal name: AETNA LIFE INSURANCE COMPANY
Offered again in 51 of 54 counties. Not offered in 3. Check your county below.
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- Offered Againin 2027
- 51
- of 54 countiesin 2026
- Not Offeredin 2027
- 3
- of 54 countiesin 2026
- People inThis Plan
- ~9,700
- CMS enrollment,October 2026
Not offered: CMS's 2027 plan list and plan crosswalk show the plan isn't offered in the county (for drug plans, the state) in 2027 and its members aren't moved to another plan there. Members need to pick a new plan, unless their plan's letter offers another option. If they do nothing, Medicare Advantage and Cost plan members will have Original Medicare. Members of any plan that covered drugs will have no Medicare drug coverage, unless they get Extra Help (outside U.S. territories, Medicare then puts them in a drug plan). Everyone in these plans keeps Medicare.
Mississippi
See the 54 counties in MississippiHide the counties
Costs and Star Rating
| What | 2026 | 2027 |
|---|---|---|
| Monthly premium (without Extra Help) | $0 a month | $0 a month |
| Maximum you pay for covered medical care | $9,250 (in-network) | $9,850 (in-network) |
| Drug deductible | $615 | $600 |
| Overall star rating (from CMS) | 4.5 out of 5 stars | 4 out of 5 stars |
PPO plans also have a limit for in- and out-of-network care combined. See Medicare Plan Finder.
CMS rates contracts, so plans under one contract share its rating. For costs with Extra Help, use the lookup.
What Happens Next
If this plan is not offered in your county in 2027, you can pick a new plan from October 15 to December 7, 2026. If your plan is ending, you also have until February 28, 2027. Check your county to see what happens if you do nothing.
These numbers come from CMS's plan files. If you're in this plan, confirm with your Annual Notice of Change or the letter from your plan.
Source: CMS CY2027 Landscape, data as of October 18, 2026 (release 202610). Enrollment: CMS Monthly Enrollment by Contract/Plan/State/County, October 2026. Plan moves: CMS 2027 Plan Crosswalk, file dated October 1, 2026. People counts add up the counties where this plan is offered. They leave out members who live outside that area. See how we get our numbers.