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Everything tagged healthcare, across every stream.

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CVS will split into two companies, undoing its Aetna merger; shares fall more than 12%

CNBC's report explains the breakup, who runs each half, and why pharmacy benefit managers are under pressure in Washington and the states.

CVS Health said on Wednesday, November 4, that it plans to split into two publicly traded companies by the first half of 2028, separating its roughly 9,000 retail pharmacies from its Aetna insurance business and its Caremark pharmacy benefit manager. It reverses the $78 billion Aetna deal of 2018 and, CNBC notes, would be one of the largest corporate breakups on record.

The insurer and PBM company would keep the CVS Health name under CEO David Joyner, who told CNBC the move comes 'out of a position of strength.' The drugstore company would be called CVS Pharmacy, led by Prem Shah. Shareholders would own stock in both. CVS also beat third-quarter estimates, with sales of $108.40 billion.

Shares closed more than 12% lower. CNBC reports that PBMs face bipartisan scrutiny, and that Tennessee and Arkansas have passed laws banning co-ownership of PBMs and pharmacies, which CVS and others are challenging in court.

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  • Pharmacy benefit management

    After exploring CVS to split off drugstore business, to understand the middlemen at the center of this split, read Pharmacy benefit management.

    Wikipedia explains pharmacy benefit managers as third-party administrators of prescription drug programs for health plans, employers, Medicare Part D and government employee plans.

    Wikipedia · Swim · 30 min

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Eli Lilly raises its 2026 sales forecast to $91-92 billion as Zepbound and Mounjaro keep growing

CNBC breaks down which drugs beat, the weaker obesity-pill launch, and the CEO's case for a bigger obesity market.

Eli Lilly reported third-quarter revenue of $24.4 billion on October 29, above the $22.61 billion analysts expected, and adjusted earnings of $7.48 a share against $6.26 expected, per LSEG. It raised its 2026 revenue forecast to $91 billion to $92 billion, from $85 billion to $87 billion. Its earnings-per-share outlook moved slightly lower to $35 to $36, because $4.57 a share in deal-related charges more than offset a $4.07 increase in underlying guidance.

Mounjaro revenue rose 65% to $10.72 billion, with sales outside the US up 93%, and Zepbound rose 49% to $5.35 billion. Sales of the new obesity pill Foundayo, launched in April, came in below expectations. CEO Dave Ricks pointed to Medicare's pilot coverage of GLP-1 drugs for weight loss. The stock rose 6% to 8% during the day, and CNBC reports the healthcare sector hit a record high.

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Microsoft says its AI diagnosis system beat physicians on hard cases in a study published in Science

Microsoft's post gives the headline numbers; TechCrunch's report adds the caveats, including that specialists weren't part of the comparison.

Microsoft AI says its diagnostic system, MAI-DxO, was more than twice as accurate as physicians on complex case studies published in The New England Journal of Medicine, in work published Thursday in Science. The system coordinates several AI agents that act like a panel of doctors: they question a simulated patient, order tests and debate a diagnosis. Microsoft also says it was 1.7 times more accurate than physicians on common emergency-department presentations, and reached diagnoses at a half to a third of the cost.

TechCrunch reports the system was right 83% of the time on the complex cases, versus 36% for primary care doctors and general internists working alone with reference materials. Specialists and physician teams, who usually handle cases this hard, weren't in the comparison. The study's own data suggests much of the gain comes from stronger underlying models (its best results used OpenAI's GPT-5 and GPT-5.5), and on emergency cases the orchestration added little over GPT-5.5 by itself. Microsoft AI CEO Mustafa Suleyman called it a step toward "medical superintelligence" and said Microsoft is training a health foundation model with the Mayo Clinic for release next year.

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UndertowBenchmark scores can overstate real-world reliability

What hidden risk could pull against this, even if the news is good?

The 83% versus 36% comes from a simulation with NEJM case records and a simulated patient, against generalists working alone, not the specialists or teams who usually handle such cases. TechCrunch notes that on emergency-department cases, GPT-5.5 with and without the orchestration scored about the same, so the test design shapes how big the headline gap looks.

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UndertowDelayed Consequence / False Success Problem

What hidden risk could pull against this, even if the news is good?

Suleyman describes the goal as a "flywheel": a model in production, improved from real-world usage. In medicine, whether a diagnosis was right often isn't known for weeks or months, so a system that is iterated on how cases look early can be rewarded for answers that only later turn out wrong.

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Trump administration says it will remove 760,000 people from ACA coverage over fraud concerns

Everyone says fraud should be stopped; the political fight is over whether the government's process will remove mostly fake enrollments or real people who still qualify.

What happened

The administration announced plans to remove about 760,000 people from Affordable Care Act marketplace enrollment, saying the records reflect fraud, duplicate enrollment or people who do not exist. Officials estimate the move would cancel roughly $2.2 billion in subsidies.

Republican / administration case

The administration says taxpayers should not fund fraudulent or invalid enrollment and presents the action as part of a broader effort to reduce waste in federal health programs.

Democratic / critic case

Democrats support combating fraud but warn that aggressive purges can wrongly terminate legitimate coverage, particularly when people face documentation problems or errors they did not cause.

Libertarian perspective

There was no major recent Libertarian Party statement on this specific purge that I found. The libertarian policy split would usually distinguish between support for rooting out fraudulent spending and broader skepticism about government-managed insurance subsidies in the first place.

Where the disagreement really is

There is little dispute that fake enrollment should be removed. The contested question is whether the verification process is accurate enough to avoid taking coverage from eligible people.

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