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

Blue Cross Medicare Advantage Balance is not offered in 2027

H8634Contract031Plan

PPO · served 58 counties in Oklahoma 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 Balance (H8634-031) 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 $100 eyewear allowance and $100 over-the-counter allowance end with it; other plans sold in its counties may offer them (each county page lists the 2027 plans). 164 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$97not offeredplan ends
In-network out-of-pocket limit$4,500not offeredplan ends
Eyewear, yearly limit$100 a yearnot offeredplan ends
Over-the-counter items, yearly$100 a yearnot offeredplan ends
Counties served58noneplan 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 58 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
Oklahoma, OK85
Adair, OKfewer than 11
Alfalfa, OKfewer than 11
Atoka, OKfewer than 11
Blaine, OKfewer than 11
Bryan, OKfewer than 11
Caddo, OKfewer than 11
Canadian, OKfewer than 11
Carter, OKfewer than 11
Cherokee, OKfewer than 11
Cleveland, OKfewer than 11
Coal, OKfewer than 11
Comanche, OKfewer than 11
Cotton, OKfewer than 11
Craig, OKfewer than 11
Creek, OKfewer than 11
Custer, OKfewer than 11
Dewey, OKfewer than 11
Garfield, OKfewer than 11
Garvin, OKfewer than 11
Grady, OKfewer than 11
Grant, OKfewer than 11
Greer, OKfewer than 11
Harmon, OKfewer than 11
Hughes, OKfewer than 11
Jackson, OKfewer than 11
Jefferson, OKfewer than 11
Johnston, OKfewer than 11
Kay, OKfewer than 11
Kingfisher, OKfewer than 11
Kiowa, OKfewer than 11
Lincoln, OKfewer than 11
Logan, OKfewer than 11
Love, OKfewer than 11
Major, OKfewer than 11
Marshall, OKfewer than 11
Mayes, OKfewer than 11
McClain, OKfewer than 11
McIntosh, OKfewer than 11
Murray, OKfewer than 11
Muskogee, OKfewer than 11
Noble, OKfewer than 11
Nowata, OKfewer than 11
Okfuskee, OKfewer than 11
Okmulgee, OKfewer than 11
Osage, OKfewer than 11
Pawnee, OKfewer than 11
Pittsburg, OKfewer than 11
Pontotoc, OKfewer than 11
Pottawatomie, OKfewer than 11
Pushmataha, OKfewer than 11
Rogers, OKfewer than 11
Seminole, OKfewer than 11
Stephens, OKfewer than 11
Tillman, OKfewer than 11
Tulsa, OKfewer than 11
Wagoner, OKfewer than 11
Washington, OKfewer than 11

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

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