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

Blue Cross Medicare Advantage Dental Premier is not offered in 2027

H8634Contract021Plan

PPO · served 66 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 Dental Premier (H8634-021) 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 $3,000 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). 856 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$0not offeredplan ends
In-network out-of-pocket limit$7,500not offeredplan ends
Comprehensive dental, yearly limit$3,000 a yearnot offeredplan ends
Eyewear, yearly limit$100 a yearnot offeredplan ends
Counties served66noneplan 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 66 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
Williamson, IL104
McHenry, IL74
La Salle, IL69
Franklin, IL49
Crawford, IL43
Winnebago, IL40
Peoria, IL30
Edgar, IL28
McLean, IL28
Coles, IL27
Kankakee, IL22
Effingham, IL20
Madison, IL19
St. Clair, IL19
Iroquois, IL18
Boone, IL16
Rock Island, IL16
Warren, IL16
Johnson, IL14
Lee, IL14
Wayne, IL14
Morgan, IL12
Union, IL12
Livingston, IL11
Alexander, ILfewer than 11
Brown, ILfewer than 11
Bureau, ILfewer than 11
Calhoun, ILfewer than 11
Cass, ILfewer than 11
Christian, ILfewer than 11
Clark, ILfewer than 11
Clay, ILfewer than 11
Cumberland, ILfewer than 11
Edwards, ILfewer than 11
Fayette, ILfewer than 11
Ford, ILfewer than 11
Gallatin, ILfewer than 11
Greene, ILfewer than 11
Hamilton, ILfewer than 11
Hardin, ILfewer than 11
Jasper, ILfewer than 11
Jefferson, ILfewer than 11
Jersey, ILfewer than 11
Jo Daviess, ILfewer than 11
Lawrence, ILfewer than 11
Macoupin, ILfewer than 11
Marshall, ILfewer than 11
Mason, ILfewer than 11
Mercer, ILfewer than 11
Monroe, ILfewer than 11
Montgomery, ILfewer than 11
Moultrie, ILfewer than 11
Perry, ILfewer than 11
Piatt, ILfewer than 11
Pike, ILfewer than 11
Pope, ILfewer than 11
Pulaski, ILfewer than 11
Putnam, ILfewer than 11
Randolph, ILfewer than 11
Richland, ILfewer than 11
Scott, ILfewer than 11
Stephenson, ILfewer than 11
Wabash, ILfewer than 11
Washington, ILfewer than 11
Whiteside, ILfewer than 11
Woodford, ILfewer than 11

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

What else should you check?