‘No gap’ and ‘known gap’ private health cover: how they work, what they don’t cover, and why choice can shrink
Why “no gap” sounds appealing right now
During a cost-of-living crisis, many Australians are taking a harder look at their private health insurance and asking a simple question: is it actually delivering value?
Common frustrations include rising premiums, the high fees charged by specialists, large out-of-pocket expenses, and the experience of “bill shock” — unexpected charges that arrive after treatment. Against that backdrop, it is easy to see why “no gap” and “known gap” arrangements attract attention. They promise something many people want most from insurance: predictability.
These arrangements have also been in the news recently amid concerns about how a major insurer has been negotiating with hospitals to provide this type of care. But the broader issue is bigger than any one negotiation. To make sense of the options, it helps to understand what “no gap” and “known gap” actually mean in practice, what they cover, what they don’t, and how they can affect the doctors you are able to see without paying extra.
Out-of-pocket costs are large — and not evenly spread
Australians spent A$44 billion out-of-pocket on health in 2023–24. That averages to $1,636 per person per year.
But averages can hide how costs are distributed. A significant share of out-of-pocket spending is concentrated among people who use the private system. For those patients, a single hospital admission involving multiple specialists can generate thousands of dollars in gap payments — and many of those costs can come as a surprise.
Some common examples during a private hospital admission include:
An anaesthetist charging well above the Medicare schedule fee. Patients rarely choose their own anaesthetist, so this bill can be unexpected.
A surgical assistant whose fees the insurer does not cover.
Consulting specialists involved during an admission who charge above the Medicare rebate and do not participate in the insurer’s “no gap” arrangement.
One underlying driver is that specialist fees in Australia are unregulated. That means doctors can set their own prices. In this environment, it is unsurprising that privately insured Australians look for arrangements that reduce uncertainty — even if they don’t eliminate costs entirely.
How private hospital billing usually works
To understand “no gap” and “known gap”, it helps to start with the standard payment structure for private patients (either in private hospitals or as private patients in public hospitals).
Typically:
Medicare pays 75% of the Medicare schedule fee (the government-set fee for specific services).
Your private health insurer covers the remaining 25% of the schedule fee.
If the doctor charges above the combined Medicare + insurer amount, you pay the difference. That difference is the “gap”.
In some cases, patients pay for their hospital admission first and are reimbursed later by their private health insurer. Regardless of the payment flow, the key point is that the Medicare schedule fee is the reference price — and anything above it can become an out-of-pocket cost unless a separate arrangement applies.
What “no gap” means — and why it can limit choice
In plain terms, a “no gap” arrangement means you pay nothing out-of-pocket for your doctor’s fees for that service.
But there is a major condition: it only applies if your doctor has agreed to participate in your insurer’s scheme.
Under a “no gap” arrangement, the insurer pays participating doctors an agreed rate in exchange for the doctor charging the patient nothing extra. For consumers, the benefit is obvious: fewer surprise bills, at least for the services covered under the arrangement.
This can be particularly important for a planned procedure where you can choose your surgeon in advance and confirm whether they participate.
However, the trade-off is that you are generally limited to doctors within your insurer’s preferred network if you want the “no gap” promise to hold. If your preferred surgeon isn’t part of the scheme — or if the anaesthetist assigned on the day is not participating — then you may face out-of-pocket charges again.
In other words, “no gap” can reduce costs, but it can also reduce freedom to choose a specialist without financial consequences.
What “no gap” does not cover
Another common misunderstanding is assuming “no gap” means the entire episode of care will be free of extra charges. In reality, “no gap” arrangements described here relate to doctors’ fees.
Other parts of a hospital admission may still generate gap fees depending on your plan, including:
Hospital room charges
Theatre fees
Prostheses
That means a patient could have a “no gap” arrangement for a particular doctor’s fee and still face other out-of-pocket costs connected to the hospital stay.
The outpatient catch: specialist consultations in private rooms
There is also a crucial distinction between hospital care and outpatient care — the specialist consultations you have before or after a procedure in the specialist’s private rooms.
Private insurers are legally prevented from covering these outpatient visits. For these consultations, Medicare pays 85% of the schedule fee. If your specialist charges above the schedule fee — which most do — you pay the full gap out-of-pocket, with no insurance coverage at all.
These gaps can be substantial: a few hundred dollars per visit is possible, and the total can climb quickly if you need ongoing specialist care. This is one reason people can still feel significant financial pressure even when they have private health insurance and even when they have tried to use “no gap” arrangements for hospital treatment.
What “known gap” means — more choice, but costs can stack up
“Known gap” is often presented as a middle ground between standard billing and “no gap”. Under a “known gap” arrangement, the doctor charges above the schedule fee, but the insurer caps how much you pay — typically up to $500 per service — and you are told the amount before the procedure.
Because “known gap” still allows doctors to charge above the schedule fee, more doctors participate in these schemes compared with “no gap” programs. For consumers, that can mean:
More specialist choice than a strict “no gap” network
Greater certainty about what you will pay upfront
But there is an important practical reality: hospital care often involves multiple specialists. A surgeon, an anaesthetist, and an assistant may all bill separately. Even when each fee is capped, those capped gaps can add up across providers and services.
So while “known gap” can reduce surprise, it does not necessarily reduce the total bill to a small amount — particularly for complex admissions.
Why insurers push these arrangements
Insurers have a clear financial interest in “no gap” and “known gap” arrangements. By negotiating agreed rates with doctors, insurers can limit their liability and make costs more predictable.
Large insurers with millions of members have significant bargaining power. Doctors who want access to those patients may have an incentive to join the scheme, even if the agreed rates are below what they might otherwise charge.
For patients who see participating doctors, this can translate into lower out-of-pocket costs and fewer unexpected bills. But it also means insurers can gain influence over which doctors patients can see without a financial penalty.
Networks and the question of patient choice
In the United States, “managed care” has long been a dominant model, with insurers building networks of preferred providers and financially penalising patients for going outside them.
Australia’s system is different. Medicare provides universal health-care coverage, and private health insurance sits alongside it.
In Australia, “no gap” and “known gap” schemes do not prevent you from seeing a specialist doctor using your private health insurance. You can still choose any specialist. The difference is that you may pay more if you go outside your insurer’s network or outside the doctors participating in the relevant scheme.
That distinction matters. It means these arrangements can shape behaviour not through outright restrictions, but through price signals that encourage patients to stay within certain provider lists if they want to avoid extra costs.
What to ask before you rely on “no gap” or “known gap”
Because these arrangements can be misunderstood, it is worth approaching them as tools for managing financial risk rather than as guarantees that all health-care costs will be covered.
Based on how these schemes operate, practical questions to clarify include:
Is my surgeon participating in my insurer’s “no gap” or “known gap” scheme for this procedure?
Who else will bill me during the admission (for example, anaesthetist, assistant, consulting specialists), and are they participating too?
What parts relate to doctors’ fees versus hospital charges such as room, theatre, or prostheses, which may still attract gaps depending on my plan?
What outpatient consultations will I need before and after hospital care, recognising insurers cannot cover private-room specialist visits and gaps may apply there?
These questions reflect a central lesson: the label “no gap” may apply to a specific service by a specific participating doctor, not necessarily to the entire journey of care.
A workaround, not a cure for high out-of-pocket costs
At a system level, “no gap” and “known gap” schemes are a private-sector response to a broader problem: high and unpredictable out-of-pocket health-care costs driven in part by unregulated specialist fees.
These schemes may be useful in reducing surprise bills and improving predictability for some hospital services. But they do not address the root cause of rising gaps, and they cannot solve the outpatient consultation problem because insurers are legally prevented from covering those visits.
A policy-based approach described as preferable would be for the government to set a fair Medicare schedule fee, update it annually, and tie rebates to specialists who charge at or near that fee. Under this approach, specialists who charge well above the schedule fee would not receive the same taxpayer subsidy (Medicare rebate) as those who charge reasonably.
That type of reform would aim at the underlying pricing dynamics rather than relying on insurer networks and negotiated deals to contain costs.
The bottom line for consumers
“No gap” and “known gap” arrangements can help privately insured patients reduce bill shock for hospital care, especially when treatment is planned and you can confirm which doctors are participating. The catch is that the benefit is tied to insurer networks and participating providers, and it does not automatically extend to every clinician involved in an admission.
Even when hospital doctor fees are controlled, patients can still face significant out-of-pocket costs from other hospital charges depending on their plan, and from outpatient specialist consultations in private rooms — an area private insurers cannot cover.
Used carefully, these schemes can improve predictability. But they are best understood as a workaround to manage costs within the existing system, not a complete solution to the broader problem of high out-of-pocket spending.