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Paul Krugman, noting that most U.S. healthcare spending is filtered through private insurers, takes aim (in his new post-NYT retirement Substack) at private health insurance in the U.S.:
Let me offer a somewhat, but only somewhat, caricatured view of U.S. health care: It’s a system in which taxpayers bear the cost of major medical care, but this taxpayer money flows through private companies that take a cut, spend a lot on administration, and do their best to deny care to people who need it.
His argument as to whether private insurers add value is sketched in lightly, and focused entirely on Medicare Advantage:
What service do private insurers provide in return for the tolls they in effect collect on a largely taxpayer-financed system? Medicare Advantage plans generally offer more extensive coverage than traditional Medicare. But there doesn’t seem to be any clear evidence that this is because private insurers provide efficiency gains the public sector doesn’t. What happens instead is that Medicare Advantage plans appear to be able to game the system sufficiently that they receive more taxpayer funding per enrollee than traditional Medicare spends on recipients in equivalent health…So you could make the case that at this point private health insurance is, in large part, a parasitical racket.
You could make that case, but leading with “you could” is a pretty equivocal way to make it. My take on the evidence (adapted from my comment on Krugman’s post) is below. The first point is a footnote to Krugman’s overview of private insurance’s share of U.S. healthcare spending.
1) Most Medicaid coverage is now also administered through private insurance companies (MCOs). Per KFF, 74% of Medicaid enrollees are in MCOs.
2) According to a KFF literature review, including a review of enrollee satisfaction surveys, Medicare Advantage enrollees are about as satisfied as traditional Medicare enrollees. By all accounts, problems in MA tend to come when you need serious care (especially post-acute care) — and denials appear to be on the increase. According to a Senate investigative report (inspired by reporting from STAT’s Bob Herman and Casey Ross), coverage denials from UnitedHealthcare MA plans for acute care more than doubled between 2020 and 2022 after the company adopted an AI tool (owned by UHC subsidiary NaviHealth, and also used by Humana and CVS Aetna) to assess claims.
3) Insurers "save" healthcare spending by denying not only needed but unneeded care -- and it's difficult to parse out the proportions of each. Surveys indicate that MA plans do encourage people to get screenings and so may prevent more acute care down the road. According to the KFF literature review, “The analyses consistently found that Medicare Advantage enrollees had higher utilization of preventive services and lower utilization of post-acute care and home health services.”
4) Some healthcare economists (e.g., Austin Frakt) find evidence that Medicare Advantage treatment protocols "spill over' into traditional Medicare and so save money there.
5) Private companies (MACs) also administer traditional Medicare, but with a very broad coverage grant and few coverage denials. MACs have no incentive to deny coverage.
6) In countries that deliver universal healthcare through private insurers, such as Germany and Japan, major medical insurers must be nonprofit. Germans can opt out of the nonprofit Statutory Health Insurance system into private plans, as 11% of the population did in 2019. But the government sets provider payment rates for private plans and limits premium increases. In Japan, as in many countries that deliver universal coverage through private plans, supplemental insurance can be for-profit.
7) In the U.S. whatever money insurers save by managing (denying) care is swamped by overpaying providers, which happens because we have no uniform payment rates, so providers divide and conquer. In the case of Medicare Advantage, where providers are paid Medicare rates or less, the savings are negated by payment formulas that overpay MA plans on a capitated basis, via a) a ridiculous risk adjustment system that incentivizes massive gaming, b) over-generous payment benchmarks, and c) bonus payments based on quality ratings that don't measure quality effectively.
8) Private insurers probably do have the capacity or potential to add administrative and care management value. But in the U.S., profit skews the incentives. In fact, it skews incentives for providers as much as for insurers. Almost all participants (e.g., those owned by giant insurers or private equity) are geared toward revenue maximization ("nonprofit" or not).
P.S. My own two-part assessment of Medicare Advantage (from 2022) starts here.
Photo by Arthur Uzoagba
