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Plan year 2026 · coverage ends Dec. 31, 2026CMS crosswalk of Oct. 1, 2026

Blue Cross Medicare Advantage Choice Premier is not offered in 2027

H8634Contract004Plan

PPO · served 36 counties in Illinois in 2026

Run by Health Care Service Corporation (contract H8634), sold as Blue Cross and Blue Shield of IL, NM, OK, TX, owned by Health Care Service Corporation

CMS crosswalk: not offered in 2027

Not offered in 2027

Blue Cross Medicare Advantage Choice Premier (H8634-004) is not offered in 2027: the CMS plan crosswalk of October 1, 2026 lists it as terminated, so its coverage ends December 31, 2026. The plan's $750 dental allowance and $100 eyewear allowance end with it; other plans sold in its counties may offer them (each county page lists the 2027 plans). 3,031 people were enrolled in it in September 2026. They can choose another plan during open enrollment, October 15 to December 7, 2026, to have no gap (or by the end of February, with coverage from the first of the next month); anyone who does not join another plan before it ends moves to Original Medicare, without a drug plan unless they join one (members with Extra Help or full Medicaid are enrolled in one by Medicare).

What do members lose for 2027?

The plan's 2026 amounts; it has none for 2027 under this ID.
What you pay or get20262027Change
Monthly premium$155not offeredplan ends
In-network out-of-pocket limit$4,850not offeredplan ends
Comprehensive dental, yearly limit$750 a yearnot offeredplan ends
Eyewear, yearly limit$100 a yearnot offeredplan ends
Counties served36noneplan ends

Source: CMS plan crosswalk from 2026 to 2027 (Oct. 1, 2026); CMS monthly enrollment by plan and by county, September 2026 (CMS hides counts under 11); CMS Medicare Advantage and Part D landscape files for 2027 (Sept. 22, 2026, revised Sept. 30) and 2026 (Sept. 2, 2026 revision); CMS plan benefit package files, 2027 and 2026.

What can members do, and by when?

October 15 to December 7, 2026
Open enrollment: join another Medicare Advantage plan, or Original Medicare with a drug plan. Coverage starts January 1, 2027.
December 8, 2026 to the end of February 2027
A special enrollment period because the plan is leaving: you can still join a plan, but coverage starts the first day of the month after you join, so choose by December 31 to have no gap.
If you do nothing
You are enrolled in Original Medicare when the plan ends, without a drug plan unless you join one; if you have Extra Help or full Medicaid, Medicare enrolls you in a drug plan automatically.
Without a drug plan
Going 63 days or more in a row without drug coverage can mean a late enrollment penalty if you join a drug plan later; joining by the end of February keeps a January and February gap under 63 days, waiting longer does not.
If you choose Original Medicare
You have a guaranteed right to buy Medigap Plan A, B, C, D, F, G, K or L sold in your state by any insurance company; if you were new to Medicare on or after January 1, 2020, Plans D and G take the place of C and F. Apply from 60 days before to 63 days after the plan ends; the policy starts once your Medicare Advantage coverage ends. Other Medigap plans are not covered by this right.
If you have Medicaid or Extra Help
You can switch to a different drug plan, or leave a Medicare Advantage plan for Original Medicare with a drug plan, once a calendar month; the change starts the first day of the next month.

Source: Medicare.gov, “Special enrollment periods”, “When can I buy a Medigap policy?” and “Help with drug costs” (read Oct. 7, 2026).

Where did its members live?

Where its members lived in September 2026; each county and state page lists the 2027 plans sold there.

All 36 counties, most members first; CMS hides counts under 11 per county, so the counties add up to a little less than the plan's total
CountyMembers, Sept. 2026
Cook, IL1,763
DuPage, IL459
Will, IL290
Kane, IL168
Lake, IL99
McHenry, IL46
Kendall, IL26
Tazewell, IL22
DeKalb, IL18
Sangamon, IL17
Vermilion, IL16
Adams, ILfewer than 11
Bond, ILfewer than 11
Carroll, ILfewer than 11
Clinton, ILfewer than 11
De Witt, ILfewer than 11
Douglas, ILfewer than 11
Fulton, ILfewer than 11
Grundy, ILfewer than 11
Hancock, ILfewer than 11
Henderson, ILfewer than 11
Henry, ILfewer than 11
Jackson, ILfewer than 11
Kankakee, ILfewer than 11
Knox, ILfewer than 11
Logan, ILfewer than 11
Macon, ILfewer than 11
Marion, ILfewer than 11
McDonough, ILfewer than 11
Menard, ILfewer than 11
Ogle, ILfewer than 11
Saline, ILfewer than 11
Schuyler, ILfewer than 11
Shelby, ILfewer than 11
Stark, ILfewer than 11
White, ILfewer than 11

Source: CMS monthly enrollment by plan and by county, September 2026 (CMS hides counts under 11).

What else should you check?