'Gap-free' explained: why an OSHC member can still face a private hospital bill

“Gap-free” tells you that a specific covered service carries no gap. It does not tell you that every separate cost on an admission is free. That distinction explains much of the surprise in a private hospital bill, and it is worth holding onto before you sign anything.

This article explains how private hospital cover works under the OSHC Deed commencing 1 July 2025, which bill a hospital sends to your insurer and which bill your insurer does not cover, and what to ask before you are admitted.

Two different bills, not one

An admission produces separate charges that are assessed against separate benefit rules.

• The hospital facility bill covers accommodation, theatre, intensive care, intensive care unit nursing, pharmacy and other hospital services. This bill is not set by the Medicare Benefits Schedule. What your policy pays on it depends on whether your insurer has an agreement with that hospital.
• The treating doctor’s medical bill covers the MBS item services during the admission. Under the Deed, the in-hospital medical rate is 100% of the MBS fee. Under the AllianzCare OSHC Standard policy wording effective 1 July 2026, medical services provided to admitted hospital patients are payable at 100% of the MBS fee.

A percentage of MBS is a percentage of the MBS fee. It is not the same percentage of what the hospital actually invoices. If a provider charges more than the MBS fee for a medical item, the difference is yours — and even a 100% MBS benefit does not automatically cover the amount a provider charges above the MBS fee — whether a higher benefit level or a different gap arrangement applies depends on your policy and the provider.

The private hospital split

Schedule 1 of the OSHC Deed commencing 1 July 2025 handles private hospital services in two cases, and which case applies to you is decided by one fact: does your insurer have an agreement with the hospital you are going to?

The Deed’s structure is straightforward:

• Private hospital with an agreement — benefits are paid as specified in that agreement.
• Private hospital without an agreement — benefits are paid at the applicable minimum benefit set out in the Benefit Requirement Rules.

The AllianzCare Standard wording reflects the same split: 100% of contracted charges for insurable costs with a minimum shared ward accommodation at an agreement private hospital, and the applicable minimum benefit under the Benefit Requirement Rules at a non-agreement private hospital. Other policies set their own terms, so read your own wording rather than assuming any single policy structure applies to you.

If you have elective surgery at a non-agreement private hospital, the difference between the hospital’s charge and the benefit payable under the minimum benefit is a genuine member cost. It is not a defect in your policy. It is the structure the Deed sets.

What “gap-free” does and does not mean

Gap-free means the insurer pays the benefit for that service and the provider accepts it as full payment, so no gap arises on that item.

• For a service, not for an admission. Gap-free applies to a specified covered service. It does not automatically remove excesses, non-covered items, or services outside that arrangement.
• A provider arrangement, not a policy promise. Some providers offer gap-free arrangements under their own agreement with the insurer. The insurer’s direct billing explanation notes that the clinic sends the claim to the insurer, the insurer pays the provider, and the patient may still have a gap to pay.
• Not the same as direct billing. Direct billing moves the insurer’s portion straight to the provider. It does not by itself mean the charge was zero.

An OSHC gap-free arrangement is separate from Medicare bulk billing. Per Services Australia’s bulk billing guidance, Medicare bulk billing means accepting the Medicare benefit as full payment for a particular service, and it requires Medicare enrolment and a practitioner choosing to bulk bill. OSHC membership is not Medicare enrolment, so a Medicare bulk billing decision is not what makes an OSHC service gap-free.

What the numbers look like

The figures below are arithmetic teaching cases only. They are not MBS item fees, prices, quotations or claims. Assume one eligible service with an MBS reference of AUD 100 and no other charges in the example.

What you are billed	Benefit paid	You pay	Why
100	85	15	Charge exceeds the benefit (an eligible out-of-hospital benefit, not a hospital medical rate)
100	100	0	Provider accepts the benefit as full payment
120	100	20	Charge exceeds the benefit

With the last row, and holding the charge and the approved benefit at 120 and 100, the payment route changes how the money moves but not the final amount. Under direct billing, the insurer pays 100 and you pay 20, with the timing of your payment set by the clinic. Under reimbursement, you pay the full 120 first, submit the claim, receive the approved 100, and your final cost is still 20.

Where your own costs actually begin

For a private hospital bill, the sequence is:

1. Your benefit is calculated at the relevant rate — the agreement rate, or the applicable minimum benefit under the Benefit Requirement Rules.
2. The hospital charges what it charges. Private hospitals set their own facility fees, and those fees are not constrained to the MBS.
3. The shortfall is yours wherever the charge exceeds the benefit paid, including any excess the policy applies to hospital treatment.

The Medicare Benefits Schedule Online is the reference for MBS fees, which is what medical benefits are calculated against. It is not a reference price for hospital accommodation.

Public hospital treatment

The Deed’s public hospital provision is limited to listed services provided at the State or Territory non-Medicare rate. The listed categories include admitted shared ward accommodation, intensive care, same-day admissions, post-operative services, accident and emergency department charges, and outpatient department charges.

Treat this as a defined scope, not an open promise. It covers the listed categories at the rate stated; it does not establish that every cost arising from a hospital stay is covered at 100%, and general terms, exclusions, valid claim requirements and applicable waiting periods still apply. Which setting is appropriate, and whether a particular admission or elective procedure attracts the listed public hospital categories, is a question to confirm with the hospital and your insurer. Deciding on treatment is a clinical question for your treating team, not an insurance one.

Costs that are not gaps

• Excesses or co-payments — fixed amounts the policy sets, separate from the benefit calculation.
• Waiting periods — during which a claim is not payable at all rather than payable at a reduced rate. See OSHC waiting periods.
• Non-covered services — items outside your policy’s coverage, which commonly includes routine dental and optical, as covered in our article on extras.

How to reduce the risk

1. Ask the insurer whether the hospital has an agreement before booking elective surgery.
2. Ask which bill the answer applies to. Facility and treating-doctor charges are assessed differently, so get the benefit stated for each.
3. Ask what your excess or co-payment is for hospital treatment, so the fixed amounts are not a surprise.
4. Ask whether the provider direct-bills your exact insurer and product, and whether any gap applies. AllianzCare’s explanation of direct billing notes that direct billing means the provider bills the insurer and the insurer pays the provider but the patient may still pay a gap, and that some providers offer gap-free arrangements, so confirm whether the specific service is covered by a gap-free arrangement.
5. Ask for a written estimate before you consent.
6. Keep the itemised invoice and proof of payment for anything you claim, and check the documents and deadlines with your insurer.

If direct billing does not apply, keep the itemised invoice. It usually needs the patient details, service date, provider, item or service description and amount charged, with the MBS item where applicable. Claim processing times vary by insurer — confirm with them rather than assuming a deadline. If figures do not match, ask the provider for an itemised invoice and your insurer for an explanation of the benefit before assuming an error.

Key takeaways

• Gap-free means no gap on a specified covered service, not a zero total for an admission.
• Hospital facility charges and treating-doctor medical charges are assessed separately. The in-hospital medical rate is 100% of the MBS fee; facility charges follow the agreement or minimum benefit rules.
• Private hospital cover splits on one fact: whether your insurer has an agreement with that hospital.
• Public hospital cover applies to listed categories at the State or Territory non-Medicare rate, subject to general terms and waiting periods.
• Excesses, waiting periods and non-covered services are not gaps.
• Confirm the hospital’s agreement status and each bill’s benefit before you are admitted.

Sources

• OSHC Deed commencing 1 July 2025 (PDF) — clause 3 and Schedule 1, including the private hospital services and listed public hospital categories.
• AllianzCare OSHC Standard policy wording effective 1 July 2026 (PDF) — benefit rates by service category, agreement and non-agreement private hospital terms.
• AllianzCare policy wording documents — current and archived policy documents.
• Services Australia — Bulk billing
• Medicare Benefits Schedule Online
• Private Health Insurance Ombudsman — Overseas Student Health Cover

Information is current as at 14 October 2026. This is general information about insurance administration, not medical advice, not a treatment recommendation, and not an approval of any individual claim. It does not consider your personal circumstances. CompareOSHC is not an insurer or underwriter. We may receive a commission from insurers; commissions do not influence our comparisons.