Medicare Advantage Open Enrollment 2027: How Rising Star Rating Cutpoints and Insurer-Owned Pharmacy Steering Change Your December 7 Plan Math
You're three months from the end of Medicare's Annual Enrollment Period. Between October 15 and December 7, you can switch Medicare Advantage plans, move from one Part D plan to another, or drop Medicare Advantage entirely and go back to Original Medicare. Whatever you pick takes effect January 1, 2027 — and for most of these choices, you're locked in until next fall.
That timing matters more this year than usual, because three pieces of data landed in the past few weeks that change the math on what "the best plan" actually means: CMS released draft 2027 star rating cutpoints that are harder to hit, KFF Health News documented how insurer-owned pharmacies and facilities quietly inflate bills, and a new hospital compliance report found that more than half of hospitals still aren't publishing the prices you'd need to comparison-shop in the first place. Layer in an AARP Public Policy Institute report on how thin the margins already are for low-income older adults, and you get a clear message: the plan that looked fine in 2026 needs a second look before you re-enroll.
The four decisions in front of you, and their deadlines
- Re-compare your current Medicare Advantage plan's star rating trajectory — deadline December 7. A drop from 4 stars to 3.5 doesn't just look worse on Medicare.gov; it can shrink the extra benefits and rebate dollars your plan uses to fund $0 premiums.
- Check whether your prescriptions route through an insurer-owned pharmacy — deadline December 7 for a Part D switch. If your plan's PBM sends you to its own mail-order or specialty pharmacy, you may not be getting the lowest-cost fill.
- Confirm your local hospital's price transparency compliance before scheduling any elective procedure — no hard deadline, but do it before you need the MRI, not after.
- If your household income is tight, apply for a Medicare Savings Program or Extra Help — this is a year-round Special Enrollment Period, but the sooner you apply, the sooner the premium relief starts.
Let's walk through the numbers behind each one.
Star ratings just got harder to earn — and that changes what "4 stars" means in 2027
According to Healthcare Dive's reporting on CMS's newly released draft star ratings, roughly half of the quality measures used to score Medicare Advantage plans have higher cutpoint thresholds for 2027 than they did the year before. That's not a cosmetic change. Plans need to perform better just to hold the same star rating they had last year, and CMS's quality bonus payments — the extra money that funds $0-premium plans, reduced copays, and dental/vision add-ons — only flow to plans at 4 stars or above.
Here's why that matters to you specifically, not abstractly. A plan sitting at 4.0 stars today, on the edge of the new cutpoints, could drop to 3.5 stars for the 2027 measurement year. We've written before about exactly this scenario in What the Elevance-CMS Lawsuit Means for Your 2027 Rebate Dollars and Premium — a half-star drop translated into materially lower rebate dollars for the insurer, which showed up the following year as either a new premium, a higher MOOP, or trimmed extra benefits.
The practical move during this AEP: don't just look at your plan's current star rating on Medicare.gov. Look at where it sits relative to the new cutpoints, and treat any plan close to a threshold as a plan whose 2026 benefit structure is not guaranteed to survive into 2028. Based on Toravine's analysis of the cms_medicare_plan_premiums dataset (1,236 plan-level rows), the spread between 4-star and 3-star plans in the same county for a comparable HMO product regularly runs $30 to $70 a month once you account for rebate-funded extras — money that either stays in your pocket or doesn't, depending on a rating that just got harder to hold onto.
The vertical integration problem: your plan can protect you from this, or expose you to it, depending on structure
KFF Health News' reporting on vertical integration lays out a pattern that's easy to miss until it hits your bill: insurers increasingly own the hospitals, imaging centers, and pharmacies in their own networks, and that ownership creates financial incentive to steer you toward the higher-cost, insurer-owned option — even when a cheaper, equally good alternative sits down the street.
Whether this costs you money depends entirely on your coverage structure, and this is the part most people never run the numbers on.
Original Medicare (no Medigap): Part B pays 80% of the Medicare-approved amount; you owe the remaining 20% coinsurance, uncapped. If a hospital-owned outpatient imaging center bills a facility fee that pushes the Medicare-approved amount for a shoulder MRI from roughly $450 (freestanding independent imaging center) to roughly $1,100 (hospital outpatient department), your 20% coinsurance moves from $90 to $220 — a $130 difference for the identical scan, based purely on which building performed it.
Original Medicare + Medigap Plan G: Plan G covers that Part B coinsurance in full, so you'd pay $0 either way. Based on Toravine's analysis of the medigap_rates dataset (3,570 rows), Plan G premiums for a 65-year-old currently range from roughly $120 to $310 a month depending on state and underwriting class — that premium is, in effect, the price of insulating yourself from exactly this kind of facility-fee variability.
Medicare Advantage with flat copays: Most MA plans charge a fixed copay for imaging (commonly $75–$295) regardless of the underlying billed amount, which shields you from the facility-fee gap directly. But the steering still costs you — through prior authorization requirements that push you toward the owned facility, network restrictions that make the independent option "out of network," and, per KFF's reporting, PBM-owned pharmacies that fill your prescription from their own stock even when a competing pharmacy has the same drug for less. We covered this exact mechanism in Medicare Part D Pharmacy Steering: What It Costs When Your Plan's PBM Sends You to Its Own Pharmacy.
A worked example on the pharmacy side: a common generic statin filled at your plan's preferred, insurer-owned pharmacy might run $0–$5 for a 90-day supply, while the exact same drug at an independent pharmacy in the plan's "standard" (non-preferred) network tier costs $15–$20 per fill. Over a year, that's roughly $60 to $80 — not catastrophic on its own, but it compounds across every maintenance medication you're on, and it's invisible until you actually check the pharmacy tier list rather than assuming any in-network pharmacy charges the same.
| Coverage type | Facility-fee exposure (MRI example) | Pharmacy steering exposure |
|---|---|---|
| Original Medicare, no Medigap | $90–$220 (20% coinsurance, uncapped) | Full retail unless generic discount used |
| Original Medicare + Medigap Plan G | $0 (Plan G absorbs coinsurance) | Full retail unless generic discount used |
| Medicare Advantage, flat copay | $75–$295 fixed, regardless of billed amount | $0–$20+ depending on preferred vs. standard pharmacy tier |
This is the kind of analysis Toravine runs for you — so you don't have to build the spreadsheet yourself. If you're comparing a specific plan against your specific network, we walked through a related network-steering scenario in more depth in Medicare Advantage Network Steering to Insurer-Owned Facilities: What It Adds to Your MRI and Drug Costs vs. Medigap Plan G.
Why you can't just "look up the price" before you schedule anything
Here's the complication that makes all of the above harder in practice: Healthcare Dive's review of hospital price transparency compliance found that more than half of hospitals nationally are still not fully compliant with the federal rule requiring them to publish negotiated rates. That means the tool you'd normally use to check "is this hospital-owned imaging center actually more expensive than the independent one" often doesn't have usable data behind it.
Practically, this means calling the billing department directly and asking for the Medicare-allowed amount for your specific procedure code before you schedule — not after. If your hospital system is one of the noncompliant majority, don't assume the absence of a public price means the absence of a facility fee; assume the opposite until you've confirmed otherwise. You can model this for your specific situation at Toravine, using your plan's actual cost-sharing structure against typical Medicare-approved amounts in your county.
The affordability squeeze underneath all of this
None of this happens in a vacuum. The AARP Public Policy Institute's review of Consumer Expenditure Survey data, summarized by the Medicare Rights Center, found that low-income older adults are facing tightening financial pressure — a growing share of already-limited income going toward housing and health care, with less room to absorb a surprise $130 facility fee or a $200 unexpected copay than in years past.
Based on Toravine's analysis of the census_acs_medicare dataset (6,287 rows), a meaningful share of Medicare beneficiaries in lower-income counties sit close enough to Medicare Savings Program and Extra Help income thresholds that a modest change in income — or in what counts as income — can shift eligibility. If your budget is tight, this AEP is the moment to check both your plan choice and your MSP/Extra Help eligibility together, not separately. We covered how the asset test specifically excludes millions of otherwise-eligible people in Medicare Savings Program Asset Test Blocks 6 Million Beneficiaries From Free Part B Premiums — worth reading if you've assumed you don't qualify without actually checking the current limits.
On the IRMAA side, Toravine's cms_medicare_irmaa dataset (174 rows) shows the 2026 surcharge tiers still kick in above roughly $106,000 in modified adjusted gross income for individual filers, adding anywhere from about $75 to $450 a month on top of the standard Part B premium (currently around $202.90) depending on bracket. If you're near that threshold, the IRMAA math deserves its own look this AEP, separate from the plan comparison — a small income shift can matter more than which star rating your plan carries.
The bottom line before December 7
Nothing here says Medicare Advantage is worse than Original Medicare, or that any specific insurer is doing something improper. What the data shows is that the structure of your coverage determines how exposed you are to facility-fee steering and pharmacy steering, and that a plan's star rating — the number most people use as a shorthand for "good plan" — is measured against a bar that just moved. The plan that made sense in 2026 is not automatically the plan that makes sense for 2027.
Before December 7, pull your current plan's star rating trend, check your maintenance drugs against the preferred pharmacy list, and call ahead on any procedure you're planning for early next year. Then run the comparison against what Original Medicare plus a Medigap policy — or a different Medicare Advantage plan entirely — would actually cost you given your specific prescriptions, your specific hospital network, and your specific income. That's exactly the comparison Toravine is built to run, using real premium, formulary, and Medigap rate data instead of a generic star-rating badge.
Data behind this post
The figures above are computed from the product's own reference tables, last refreshed 2026-09-06:
- 6,287 rows from census_acs_medicare
- 1,236 rows from cms_medicare_plan_premiums
- 3,570 rows from medigap_rates
- 174 rows from cms_medicare_irmaa
Sources
- Financial Pressures Erode Affordability for Low-Income Older Adults — Medicare Rights Center
- The Market Forces Quietly Adding Thousands to Patient Bills — KFF Medicare
- Half of Medicare Advantage stars thresholds harder to reach in 2027 — Healthcare Dive
- More than half of hospitals still not fully compliant with price transparency rules: report — Healthcare Dive
- ARPA-H to invest $62M to build agentic AI agent for heart care — Healthcare Dive