Thousands of Medicare Advantage patients across Kansas City and St. Louis are being warned that their longtime hospital system will no longer accept their Aetna coverage starting January 1, 2027. BJC HealthCare, which operates in combination with Saint Luke's in Kansas City, has told Aetna it is pulling back access for Medicare Advantage members, a move that also reaches into Washington University School of Medicine's physician network and Saint Luke's facilities in St. Louis.
According to KCTV, the change was confirmed directly to Aetna by BJC HealthCare, and it extends beyond the Kansas City market to affect Washington University School of Medicine physicians and Saint Luke's operations in St. Louis as well. Saint Luke's has spelled out the shift in plainer terms on its own website, stating that beginning January 1, 2027, it will no longer participate in Aetna Medicare Advantage plans, and that its physicians and other providers and facilities will be considered out of network for those members once the date hits, according to Saint Luke's.
Saint Luke's said the split follows a prolonged effort to find common ground, noting that despite longer-term negotiation efforts, it was unable to achieve a satisfactory agreement with Aetna Medicare Advantage plans. The hospital system added that it expects to remain in-network with Traditional Medicare, most Medicare Supplement or Medigap plans, and other Medicare Advantage plans in 2027, meaning the fallout is specific to Aetna rather than a wholesale Medicare pullback.
Patients Could See Higher Costs
For patients who stay enrolled in an affected Aetna Medicare Advantage plan, Saint Luke's warns the consequences could hit the wallet. In most cases, the hospital system says, this could result in higher out-of-pocket costs or different coverage rules when a patient seeks care from Saint Luke's providers after the switch takes effect.
Aetna, for its part, has pushed back on the idea that the door is closed. The insurer said it is willing to work with BJC HealthCare and Saint Luke's to reach an agreement that keeps them in its Medicare network, and it maintains that it already has a robust provider network in both the Kansas City and St. Louis areas — both claims reported by the station. Patients with questions about their Aetna coverage are being directed to call the number listed on their membership ID card.
A Pattern Playing Out Nationwide
This is not the first time BJC and Aetna have clashed over Medicare Advantage terms. In December 2025, BJC Health announced it had reached an agreement with Aetna on commercial and Medicare Advantage plans, describing it at the time as a one-year deal meant to keep BJC HealthCare and Saint Luke's entities in Aetna's network, per BJC Health's own announcement. That earlier truce appears to have expired without a longer-term replacement, given Saint Luke's current statement that talks ultimately fell short.
The St. Louis side of the split carries its own scale. BJC HealthCare operates 14 hospitals across Missouri and southern Illinois, and Aetna covers just over 72,000 Medicare Advantage enrollees in the 15-county bi-state St. Louis metro area, according to Live Insurance News. When Anthem Medicare Advantage enrollees are factored in alongside Aetna's, that outlet estimates roughly 85,800 seniors sit in the affected pool, though not everyone in that group necessarily uses BJC facilities. Separately, stltoday.com has reported that BJC HealthCare and Washington University Medicine are leaving the Medicare Advantage networks of both Aetna and Anthem Blue Cross Blue Shield, a detail that places the Aetna split within a wider contract dispute playing out across BJC's insurer relationships.
Part of a Broader Industry Shakeout
The BJC and Saint Luke's exit lands amid a wave of similar breakups between hospital systems and Medicare Advantage insurers nationwide. Contract breaks between major health systems and certain Medicare Advantage insurers are continuing in 2026, and providers dropping plans often point to prior-authorization denials and slow reimbursement as the underlying friction, according to Becker's Hospital Review. That outlet notes Medicare Advantage now covers more than half of eligible Medicare beneficiaries nationally, which raises the stakes every time a major system walks away from a plan.
Comparable splits have already hit other regions this year. Ohio-based Kettering Health dropped Humana and Devoted Health Medicare Advantage plans for 2026 and plans to exit Anthem Medicare Advantage in 2027, while Virginia-based Sentara Health says it will go out of network with Anthem Medicare Advantage at the end of 2026 after failed negotiations, Becker's reports. Closer to home, North Kansas City-based NKC Health went out of network with UnitedHealthcare Medicare Advantage on October 1, and Oklahoma's Norman Regional Health System left Aetna's Medicare Advantage network in August before planning a similar move against UnitedHealthcare in October. Iowa-based Avera Health is also no longer in-network with Aetna Medicare Advantage this year, the outlet notes — all signs of the same reimbursement standoff now reaching Kansas City and St. Louis.
Kansas City Families Face a Second Network Headache
The Aetna fallout isn't the only coverage disruption rattling Kansas City patients this fall. Children's Mercy Hospital announced that its Affordable Care Act Marketplace coverage is changing on January 1, following a decision the hospital says was outside its control. The hospital said plainly that the health plans have chosen not to include Children's Mercy as an in-network provider, adding that this was not a decision made by Children's Mercy, according to FOX4 Kansas City.
What Patients Can Do Now
Federal guidance offers some limited reassurance for patients caught in the middle of these network exits. A model termination notice from the Centers for Medicare & Medicaid Services instructs affected members to review their plan's current provider directory or request a paper copy by calling the plan when a provider is leaving the network, according to CMS. Separate CMS guidance on managed care indicates that continuation of care may be available to some members in certain situations, and Saint Luke's has said some patients may qualify for a continuity-of-care transition period — though eligibility and duration aren't spelled out in what's been made public so far.
With healthcare costs forecast to jump by double digits next year, according to stltoday.com, the timing adds pressure on patients already weighing whether to switch plans during open enrollment or risk losing access to familiar doctors. For now, Aetna says negotiations remain possible, while Saint Luke's and BJC HealthCare are preparing patients for a January 1 cutoff that, as of today, still stands.
