Southern Cross says the rules that decide whether a treatment is covered can change, and in some cases get tighter.
The health insurer made the point in an explainer on eligibility criteria published on 5 October. It said members sometimes ask why the criteria for some treatments and procedures change.
Eligibility criteria, it says, "help determine when a particular treatment, procedure or service is covered under a health insurance policy".
Southern Cross says it reviews them from time to time to keep them in line with current clinical evidence and medical practice. It also weighs the long-term affordability and sustainability of health insurance for the wider membership.
Sometimes a review changes things, it says, and sometimes it doesn't.
"Changes can mean eligibility criteria are broadened, clarified, refined, or in some cases narrowed where evidence suggests a different approach is appropriate."
Any proposed change goes through a formal review and governance process, Southern Cross says, which includes clinical assessment and oversight. It says decisions draw on clinical evidence, specialist expertise and the impact on members.
The explainer is also a statement of how members find out. Southern Cross says it publishes current criteria on its website, where they can be accessed at any time. It also tells its Affiliated Providers, who are responsible for assessing eligibility under the Affiliated Provider programme.
The insurer says the criteria are part of the policy itself.
"Our policy documents note that eligibility criteria form part of the policy and refers members to our website to check the criteria."
Southern Cross also encourages members "to check their policy details regularly and to contact us if they have questions about what is or isn't covered".
The explainer doesn't name any treatment or any specific change. It doesn't say how often criteria are reviewed or how many have been narrowed.
Southern Cross says it understands it can be disappointing when a treatment or procedure isn't eligible for cover. It says these conversations often happen when people are dealing with health concerns.
"That's why we're committed to being transparent about how our policies work, how decisions are made, and why eligibility criteria sometimes change."
More on how health insurance works is on QuoteHub.
