Aetna Medicare Signature (PPO) (H5521-431) in 2027

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PPO: about this plan type · Legal name: AETNA LIFE INSURANCE COMPANY

Called Aetna Medicare Signature Extra (PPO) in 2026 and Aetna Medicare Signature (PPO) in 2027. The plan ID stayed the same.

Offered again in 6 of 7 counties. Not offered in 1. Check your county below.

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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.

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.