Medicare contract · plan years 2026 and 2027CMS landscape and crosswalk
BCBS of Michigan Mutual Insurance Company (S5584)
S5584Contract
A company of Blue Cross Blue Shield of Michigan Mutual Ins. Co., sold as Blue Cross Blue Shield of Michigan
2 plans in 2027 (2 in 2026) · 22,036 members in September 2026
BCBS of Michigan Mutual Insurance Company is the Blue Cross Blue Shield of Michigan Mutual Ins. Co. company that holds Medicare contract S5584, sold as Blue Cross Blue Shield of Michigan. In 2027 it offers 2 plans (2 in 2026); every one of its 2026 plans continues in 2027. 22,036 people were in its plans in September 2026.
What plans does S5584 offer for 2027?
| Plan | Type | Monthly premium | Out-of-pocket limit | Area | For 2027 |
|---|---|---|---|---|---|
| Prescription Blue SelectS5584-001 | PDP | $49.80 | none (drug plan) | Michigan | renews |
| Prescription Blue PremiumS5584-002 | PDP | $80.30 | none (drug plan) | Michigan | renews |
Source: CMS Medicare Advantage and Part D landscape files for 2027 (Sept. 22, 2026, revised Sept. 30) and 2026 (Sept. 2, 2026 revision); CMS plan crosswalk from 2026 to 2027 (Oct. 1, 2026).
Which employer and union group plans does it hold?
S5584 also holds 2 group plans offered through former employers and unions, with 2,554 members in September 2026 (plans with fewer than 11 not counted). They are not sold to individuals, so the landscape files list no premiums or benefits for them; the employer or union sends their 2027 terms.
| Plan ID | Plan name | Members, Sept. 2026 | 2027 |
|---|---|---|---|
| S5584-801 | Prescription Blue Employer Plan CY | 2,554 | renews |
| S5584-802 | Prescription Blue Employer Plan non-CY | fewer than 11 | renews |
Source: CMS monthly enrollment by plan and by county, September 2026 (CMS hides counts under 11); CMS plan crosswalk from 2026 to 2027 (Oct. 1, 2026).
How did CMS rate it for 2026?
The overall rating is not rated (health plan not rated, drug plan 2.5 of 5). Of its 12 rated measures, the lowest and the highest:
| Lowest-rated measures | Stars |
|---|---|
| Drug Plan Quality Improvement | 1 |
| Getting Needed Prescription Drugs | 1 |
| Rating of Drug Plan | 2 |
| Medication Adherence for Hypertension (RAS antagonists) | 2 |
| Highest-rated measures | Stars |
|---|---|
| MTM Program Completion Rate for CMR | 5 |
| MPF Price Accuracy | 5 |
| Statin Use in Persons with Diabetes (SUPD) | 4 |
| Complaints about the Drug Plan | 4 |
Source: CMS Part C and D Star Ratings data tables, 2026 (October 2025).
What else should you check?
- All Blue Cross Blue Shield of Michigan plansEvery contract of the brand
- Star ratings of every contractThe 2026 ratings, and 2027 when CMS publishes them
- Find a plan by its IDFrom the card or a letter