If a motor accident worsens a pre-existing medical condition, claimants in New South Wales must prove the aggravation to access compensation. This article explains the evidence and records required to support such claims under the NSW Compulsory Third Party (CTP) scheme. It outlines how insurers evaluate pre-existing injuries, what documentation is essential, and steps to preserve evidence. Time limits and dispute resolution options are also addressed.
Proving Pre-existing Injury Aggravation Under NSW CTP Laws
Under the Motor Accident Injuries Act 2017, claimants must demonstrate that a motor accident caused or worsened an existing injury. This requires medical evidence showing a pre-existing condition and a clear link between the accident and the aggravation. SIRA’s guidelines state that insurers must assess whether the accident ‘materially increased’ the severity of the injury, not just caused a new one.
Key legal principles include:
- Pre-existing injuries must be documented in medical records before the accident.
- Aggravation must be shown through medical opinion, not speculation.
- Causation must be established: the accident must have directly worsened the injury.
Insurers evaluate claims by comparing pre-accident medical records with post-accident assessments. If the injury was already present but the accident caused significant deterioration, compensation may be available.
Essential Evidence to Support a Pre-existing Injury Claim
Claimants must gather specific records to prove the aggravation. Critical evidence includes:
- Pre-accident medical records - Show the existing injury’s diagnosis, treatment history, and severity. For example, a 2021 MRI report confirming a herniated disc before the accident.
- Post-accident medical records - Document worsening symptoms, new diagnoses, or treatment changes. A 2023 MRI showing increased disc herniation after the accident would be relevant.
- Medical expert reports - A specialist must confirm the aggravation. For instance, a physiotherapist noting that the accident caused ‘significant functional decline’ compared to pre-accident baseline.
- Accident details - Police reports, witness statements, and photographs can establish the incident’s circumstances.
- Income and treatment records - Show financial impact from the aggravated injury, such as lost wages or additional medical costs.
A hypothetical example: Sarah had a pre-existing knee injury from 2022. In 2025, a car accident worsened her condition, leading to surgery. Her claim would require pre-2025 knee scans, post-accident medical notes, and a specialist report linking the accident to the surgery.
How Insurers Evaluate Pre-existing Injury Claims
NSW CTP insurers assess claims by:
- Reviewing medical evidence - Comparing pre- and post-accident records to determine if the injury worsened.
- Assessing causation - Ensuring the accident, not other factors, caused the aggravation.
- Applying SIRA guidelines - Adhering to SIRA’s criteria for what constitutes a ‘material increase’ in injury severity.
Insurers may dispute claims if the aggravation is not clearly documented. For example, a claimant with a pre-existing back injury might need a specialist to confirm that the accident caused ‘significant neurological deterioration’ rather than a minor flare-up.
Practical Steps to Preserve Evidence
To strengthen a claim, injured persons should:
- Secure all pre-accident medical records - Even if they seem unrelated, they are crucial for proving the existing condition.
- Document worsening symptoms - Keep a journal of pain levels, mobility changes, and how the injury affects daily activities.
- Follow up with medical professionals - Ensure doctors assess the injury’s progression and provide written reports.
- Preserve accident-related evidence - Save police reports, witness contact details, and photos of the scene.
- Notify the insurer promptly - Delays may jeopardize claims, as SIRA’s guidelines emphasize timely reporting.
Time Limits and Dispute Resolution
CTP claims must be submitted within a reasonable time, though no strict deadline is set in the Motor Accident Injuries Act 2017. However, delays can weaken a claim. If an insurer disputes the aggravation, claimants may need to:
- Request a review - SIRA allows for reconsideration of claims based on new evidence.
- Seek independent medical opinions - A second opinion can clarify whether the injury was aggravated.
- Consult a legal professional - If disputes escalate, a solicitor can help navigate the process.
When to Seek Legal Advice
Claimants should seek legal assistance if:
- The insurer denies the claim without a clear reason.
- Medical records are incomplete or contested.
- The claimant is unsure how to prove the aggravation.
A lawyer can help draft formal requests for medical records, challenge insurer decisions, or negotiate a fair settlement.
Final Steps for Claimants
Proving pre-existing injury aggravation requires meticulous documentation. By gathering medical records, preserving evidence, and understanding how insurers evaluate claims, injured persons can strengthen their case. If unsure about the process, completing the quick, no obligation enquiry form can connect claimants with legal support tailored to their circumstances.
Every claim depends on its own facts. To request contact about your circumstances, complete the quick, no obligation enquiry form.