The promise and the problem
ACC was built on a genuinely progressive idea: that when someone is injured in New Zealand, they should receive treatment and support without having to fight through a fault-based legal system. No litigation. No blame. Just care.
In practice, this works well for straightforward physical injuries: a broken bone, a torn ligament, a documented surgical event. The injury is visible. The timeline is clear. The claim moves through without friction.
Persistent pain doesn’t work this way.
For many people, an injury that should have healed hasn’t. Or pain has developed in ways that don’t map neatly onto the original mechanism of injury. Or the pain has become widespread and complex, involving the nervous system in ways that imaging and blood tests simply won’t show. This is well-understood science — central sensitisation, where the nervous system becomes sensitised over time, is documented extensively in pain research — but it is not well-understood within the administrative logic of a compensation system.
When your pain can’t be seen on a scan, you are no longer presenting a claim. You are presenting a question mark. And in compensation systems, question marks are expensive.
How the system responds to unexplained pain
ACC, like most compensation schemes globally, operates on a biomedical model of injury: something happened, something broke, the break heals, the claim closes. This model has a built-in assumption: that there is a determinable, physical cause for every legitimate injury, and that the size of the injury is proportionate to the size of the symptoms.
Persistent pain often violates both of these assumptions. The cause may be real but not visible. The symptoms may be significantly greater than what an imaging report captures. And because the compensation system has a strong financial incentive to resolve claims, a claimant whose pain persists beyond the expected timeline begins to look, through the system’s lens, like a problem.
The response is almost always the same: an Independent Medical Examination (IME), the referral for a psychological assessment, and the quiet but unmistakable suggestion that something other than physical injury is driving the presentation.
This suggestion — that the pain is, in some meaningful sense, in your head — is rarely made explicitly. It doesn’t need to be. It operates through a series of clinical framings: “non-organic findings,” “disproportionate pain behaviour,” “psychosocial factors,” “catastrophising.” These terms have legitimate uses in pain medicine. In the context of a compensation dispute, they function differently. They shift the burden of proof onto the claimant, reframing the question from what is causing this person’s pain? to why is this person reporting pain beyond what we can verify?
This is not a minor bureaucratic inconvenience. It is a fundamental re-categorisation of the person.
The secondary gain trap
The concept of “secondary gain” — the idea that a claimant may have unconscious or conscious incentives to remain unwell — is deployed routinely in contested ACC claims. The logic is circular and, for the person on the receiving end, inescapable: your ongoing pain is evidence of your injury; but your ongoing pain claim is also evidence of possible secondary gain; and if secondary gain is present, the pain cannot be trusted.
There is no way out of this loop from inside it.
What makes this particularly damaging is not just that it can lead to claim decline or cessation of treatment. It is that it repositions the patient as a suspect. The question is no longer whether you are receiving adequate care, but whether you are a reliable reporter of your own body. Your credibility — your status as a trustworthy source of information about your own experience — has been brought into question by the very system you approached for help.
Philosopher Miranda Fricker coined the term epistemic injustice to describe this kind of harm: the wrong done to someone specifically in their capacity as a knower, as a person whose testimony should be taken seriously. In the context of ACC and persistent pain, epistemic injustice is not incidental. It is structurally embedded in how the system manages claims it cannot resolve on biomedical grounds alone.
Who bears the greatest burden
Pain bias does not fall equally across the population. In the context of ACC:
Women are significantly more likely than men to have their pain attributed to psychological causes, a pattern documented consistently in pain research. Hoffmann and Tarzian’s foundational 2001 study, and subsequent research, have demonstrated that women presenting with pain are more likely to receive sedatives where men receive analgesics, more likely to have their pain labelled as emotional in origin, and less likely to have their reported severity taken at face value.
Māori and Pasifika patients face the additional weight of systemic and structural racism in healthcare settings. The evidence base on pain management in Aotearoa reflects what is documented globally: minority patients receive less adequate pain treatment, face greater scepticism about pain severity, and are less likely to be referred for specialist review. ACC was developed within a system shaped by Pākehā norms and institutional culture. Te Tiriti o Waitangi obligations require equitable health outcomes — the persistent pain literature suggests those obligations are not currently being met.
People with prior mental health diagnoses enter the ACC process carrying a pre-existing credibility deficit. Once a diagnosis of depression, anxiety, or any psychiatric condition appears in a clinical record, it becomes the available explanation for everything that follows. Pain reports are filtered through it. The clinical system’s tendency to psychiatrically reframe unexplained physical symptoms — what some researchers describe as psychiatrisation — means that a prior diagnosis can effectively close the epistemic door on physical investigation.
What the research tells us that the system ignores
It is worth being direct about what the science of pain actually shows, because it stands in significant contrast to the administrative logic applied to persistent pain claims.
Pain is not simply a signal that travels from a damaged site to the brain. It is a construction — the nervous system’s best prediction of threat based on all available information, including past experience, context, stress levels, and the degree to which the person feels safe and believed. This is not a fringe theory. It is the current scientific consensus on how pain works, supported by decades of research in neuroscience, predictive processing, and interoception.
What this means, practically, is that:
- Pain can be completely real and completely disabling without corresponding structural damage visible on imaging
- Psychological and social factors can amplify or reduce pain without meaning the pain is fabricated or “merely” psychological
- The experience of being disbelieved, dismissed, or subjected to repeated adversarial assessments is itself a physiological stressor, and physiological stress amplifies pain
- The iatrogenic harm of the claims process — the harm caused by the process itself — is measurable and real
A compensation system that does not understand these things will not merely fail to help people with persistent pain. It will actively make them worse.
The complaint you have every right to make
If you are a person navigating ACC with a persistent pain condition, you have rights under the Code of Health and Disability Services Consumers’ Rights, regardless of whether ACC is funding your treatment. You have the right to be treated with respect, to have your pain taken seriously, and to receive services of an appropriate standard. ACC’s obligations under their own legislation require fair, timely, and transparent decision-making.
If you have been subjected to an IME process that felt adversarial, received a decision that appeared to discount your account of your own symptoms, or been told your pain is psychological in origin without adequate physical investigation, these are reviewable decisions. You can request a formal review of any ACC decision within three months of receiving it. ACC’s review process is free.
You can also make a complaint to the Health and Disability Commissioner if the conduct of any health professional involved in your care — including an IME assessor — fell below the standard required by the Code.
Neither of these pathways is easy. Both require energy that persistent pain patients often do not have. But they exist, and using them matters — not only for your individual outcome, but because each formally documented case of pain bias contributes to the evidence base that advocates, researchers, and policymakers need to push for systemic change.
What needs to change
Individual rights are necessary but insufficient. The deeper problem with ACC and persistent pain is structural, and it requires structural solutions:
The biomedical gatekeeping model needs reform. Pain that cannot be imaged is not pain that cannot be trusted. ACC’s eligibility and review processes need to be redesigned to incorporate current pain science, including the recognition that central sensitisation, widespread pain, and nervous system involvement are legitimate, diagnosable, and treatment-responsive conditions.
IME processes need independent oversight. The current system, in which ACC commissions assessments from practitioners who have a financial relationship with the insurer, creates an inherent conflict of interest. Assessors who consistently produce reports favouring claim decline face no formal accountability.
Secondary gain frameworks need to be retired or radically contextualised. The concept, as currently applied, causes demonstrable harm. Any consideration of psychosocial factors in a pain claim should be balanced against documented evidence on the pain-amplifying effects of institutional disbelief, and should never be used to override a patient’s self-report without robust justification.
Equity data must be collected and published. ACC does not currently publish demographic breakdowns of claim decisions by gender, ethnicity, or diagnostic category. Without this data, the disproportionate burden on Māori, Pasifika, and women patients cannot be formally evidenced, and accountability cannot follow.
You are not the problem
If you have been through an ACC process for persistent pain and come out the other side feeling like you failed some kind of test — like you couldn’t prove something that was self-evidently real — that feeling is a product of the system’s failures, not yours.
The standard you were held to was not a clinical standard. It was an administrative one, designed primarily to manage liability. The gap between what you experienced in your body and what the system was able to recognise is not a gap in your credibility. It is a gap in the system’s capacity to deal with the full reality of human pain.
That gap is what we are working to close.
If you have a story about navigating ACC with persistent or unexplained pain, we want to hear it. Your experience matters — not just to you, but to everyone who comes after you. [Share your story here.]
For information on your rights within the ACC system, visit the Accident Compensation Corporation website and the Health and Disability Commissioner.
