What OSHC actually does with a pre-existing condition
Most providers use a 12-month waiting period for non-psychiatric pre-existing conditions. The major point of difference is psychiatric treatment: some documented terms apply for 2 months, while Medibank excludes hospital psychiatric treatment from its pre-existing condition waiting period. Bupa’s supplied documents state different psychiatric terms, so a “psychiatric exception” is not a uniform rule across the market. Read the cover summary and fund rules for the exact policy.
For a Student visa (subclass 500), the Department of Home Affairs says you must hold OSHC from an approved Australian health insurer unless an Exception applies, provide proof of paid and adequate cover for your proposed stay, and cover everyone included in the application.
No provider publishes an approval rate for pre-existing conditions. Anyone quoting an approval rate is guessing. Whether your condition and treatment are covered depends on the provider’s own assessment under its current rules.
How the waiting period works
A pre-existing condition waiting period applies to the relevant treatment; it does not automatically mean that every medical service is unavailable. Medibank, for example, says its PEC waiting period does not apply to services provided while you are not admitted to hospital, including ambulance services and GP consultations.
Providers can define a pre-existing condition differently:
- Bupa looks for signs or symptoms during the 6 months before you joined or upgraded to a higher level of cover. Bupa says it is not necessary that you or your doctor knew the condition’s name or that it had been diagnosed.
- nib refers to signs or symptoms exhibited during the 6 months before the OSHC policy commenced, as judged by a medical practitioner appointed by nib.
- CBHS International Health uses signs or symptoms evident up to six months before the policy start date or an upgrade. An appointed doctor determines whether those signs or symptoms existed.
- Medibank conducts its own PEC assessment and says it needs up to 10 working days after receiving all required information. It advises members to allow time for a determination before agreeing to a hospital admission date.
The start date also matters. CBHS says its waiting periods start on your arrival in Australia on a student visa, or on the policy commencement date if you are already in Australia. Bupa’s definition also applies when you upgrade your level of cover.
Documented waiting periods
The comparison below uses Bupa’s OSHC Cover Summary and OSHC Fund Rules, Medibank’s OSHC Member Guide, nib’s OSHC Fact Sheet and OSHC Fund Rules, and CBHS International Health’s OSHC Membership Policy Guide.
| Provider | Non-psychiatric pre-existing conditions | Psychiatric terms | Other relevant waiting period |
|---|---|---|---|
| Bupa | 12 months maximum for pre-existing conditions | The Cover Summary says no waiting period for Hospital Psychiatric Services, including pre-existing conditions. The Fund Rules list 2 months for pre-existing conditions, ailments or illnesses of a psychiatric nature. | No waiting period for other hospital treatment when the condition is not deemed pre-existing. |
| Medibank | 12 months for treatment of a PEC | No waiting period for hospital psychiatric treatment | The PEC waiting period does not apply to services while not admitted to hospital, including ambulance and GP consultations. |
| nib | 12 months for pre-existing conditions except psychiatric treatment; also 12 months for treatment relating to an existing disability or secondary condition relating to the PEC | 2 months for pre-existing psychiatric treatment | No waiting period for ambulance services |
| CBHS International Health | 12 months for treatment of other pre-existing conditions | 2 months for a pre-existing condition of a psychiatric nature | All other services have no waiting period |
Bupa’s Cover Summary and Fund Rules use different psychiatric descriptions. Ask Bupa to confirm in writing which term applies to the exact service and policy you are considering.
The comparison is limited to providers whose current documents state these terms. The public pages checked for ahm and Allianz Care Australia did not state pre-existing condition waiting periods in retrievable text, so they are not included. The documents above were verified on 2026-10-03. Bupa’s Cover Summary is marked current from 1 July 2026, while nib’s Fact Sheet is dated 16 June 2026.
What to compare
Start with the proposed service, not just the name of the condition.
Medibank’s psychiatric exception is expressly for hospital psychiatric treatment. Bupa’s Cover Summary refers to Hospital Psychiatric Services, while nib refers to pre-existing psychiatric treatment and CBHS refers to a condition of a psychiatric nature. Do not assume that one provider’s wording applies to another provider’s GP, outpatient or hospital benefits. Ask where the treatment would be provided and which exact policy clause applies.
Check whether the policy also mentions an existing disability or secondary condition. nib states that its 12-month waiting period applies to treatment relating to an existing disability or a secondary condition relating to the PEC.
Check the definition and assessment process as well. Bupa’s lookback rule does not depend on whether the condition was known or diagnosed. nib and CBHS use the opinions of appointed medical practitioners. These are different processes, even where the waiting periods are the same.
Finally, distinguish a waiting period from a benefit limit. A service might have no PEC waiting period but still be subject to the policy’s cover, clinical eligibility or other claim requirements.
If you are switching insurers
Recognition of waiting periods already served differs between providers:
- Bupa: If you are switching from another health insurer, its waiting periods may not apply. Bupa says to check with it first; it does not promise automatic recognition in the supplied wording.
- Medibank: Its guide says that if your previous cover was not OSHC, joining within two months of leaving your previous insurer generally means you will not need to re-serve waiting periods already served. It also says membership with non-Australian health insurers or travel insurance is not accepted for recognising waiting periods. Ask Medibank which category your previous policy falls into.
- nib: nib says it will recognise waiting periods already served on equivalent cover.
- CBHS International Health: CBHS says it will recognise waiting periods already served when you transfer from another OSHC provider.
These are different transfer conditions. “Another health insurer”, “equivalent cover” and “OSHC provider” are not interchangeable descriptions. Give the new provider your former insurer, the type of cover, policy dates and the waiting periods you believe were completed. Ask it to confirm in writing what it will recognise and whether any waiting period remains.
Do not treat recognition of an old waiting period as confirmation that a particular future treatment will be paid. Ask about the waiting period and the proposed treatment separately.
If an emergency happens
An emergency admission does not automatically remove a PEC waiting period.
The Private Health Insurance Government Ombudsman says OSHC includes ambulance cover. Medibank says its PEC waiting period does not apply to ambulance services or GP consultations while you are not admitted to hospital. nib also states that no waiting period applies to ambulance services.
Hospital treatment is different. Medibank says a condition requiring hospitalisation will still be assessed as a PEC even when the admission is an emergency. Its 12-month waiting period may still apply, in which case the member must pay all hospital and medical charges.
Medibank also describes an Emergency Treatment Waiting period waiver where a 12-month waiting period would otherwise apply to hospital treatment. The waiver is conditional: a medical practitioner must certify that emergency treatment was required, and Medibank must agree.
Do not assume that Medibank’s waiver rule applies elsewhere, or that every emergency admission qualifies. Do not delay urgent care while seeking an insurance answer. Ask the treating team and insurer about payment arrangements as early as possible, and request any waiver decision in writing.
Get the answer in writing before buying
Send the provider a written message that identifies the policy, proposed treatment and relevant policy start date. Ask:
- Does the policy treat your condition as pre-existing under its definition?
- What information or medical assessment does the provider require?
- What waiting period applies to the exact treatment, and when does it start and end?
- Does the psychiatric provision apply to that treatment, or only to hospital psychiatric services?
- Are ambulance, non-admitted and hospital services treated differently?
- Will waiting periods from your previous insurer be recognised?
- What happens if you need emergency hospital treatment during the waiting period?
- Which fund rules, cover summary or membership guide version applies, and what is its effective date?
Ask the provider to connect its answer to the exact clause. If you receive only a verbal assurance, request it in writing. Save the reply and the document version with your policy records, because online terms and summaries can change.
If the response does not clearly connect your proposed treatment to the current rules, the treatment remains unconfirmed. Resolve that uncertainty before purchasing rather than relying on a general promise that pre-existing conditions are covered.