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How CTP Insurers Evaluate Liability When Changing Assessors in Western Sydney

This article explains how NSW CTP insurers assess liability when changing assessors in Western Sydney, including legal rules, practical steps, and dispute options. It clarifies the 52-week limit for threshold injuries and advises claimants to seek legal guidance if their claim is reassessed.

Current as at 18 August 2026

How CTP Insurers Evaluate Liability When Changing Assessors in Western Sydney

If your CTP insurer changes the assessor or case manager for your motor accident claim in Western Sydney, you need to understand how they assess liability. Under NSW law, insurers must follow strict rules to evaluate claims, including when reassessing injuries or changing assessors. This article explains the legal framework, practical steps, and time limits relevant to your situation.

The NSW CTP Rules Behind Assessor Changes

The Motor Accident Injuries Act 2017 (MAIA) governs CTP claims in NSW. Section 4.4 of the Act specifies that insurers must assess claims based on the injury's severity and the claimant's circumstances. When an insurer changes assessors, they must:

  • Re-evaluate the injury's classification (e.g., threshold injury, whole person impairment) using the Motor Accident Guidelines.
  • Ensure the new assessor follows the same legal standards as the original.
  • Provide a written explanation for any change in assessment.

SIRA (State Insurance Regulatory Authority) oversees compliance with these rules. Insurers cannot unilaterally change assessors without a valid reason, such as a conflict of interest or a request for a second opinion.

Practical Steps for Claimants

When an insurer changes assessors, you should:

  1. Request a written explanation for the change, including the reason and the new assessor's qualifications.
  2. Provide evidence of your injury, such as medical records, accident reports, and witness statements.
  3. Challenge the assessment if you believe the new assessor's findings are inaccurate. This may involve:
  • Submitting additional medical evidence.
  • Requesting a review by SIRA.
  • Pursuing a dispute through the NSW Civil and Administrative Tribunal (NCAT).

Insurers must also comply with the 52-week rule: if your injuries are classified as 'threshold injuries' (e.g., soft tissue injuries), weekly benefits and treatment benefits are generally limited after 52 weeks. However, this does not apply if your injury meets the whole person impairment threshold.

Time Limits and Dispute Options

CTP insurers have 28 days to respond to a claim under the MAIA. If they change assessors after this period, you may have grounds to challenge the delay. For disputes over assessor changes, consider:

  • SIRA intervention: SIRA can investigate the insurer's compliance with the MAIA.
  • NCAT review: You can apply to NCAT for a review of the insurer's decision.

If your claim involves a 'blameless accident' (where no fault is attributable to any party), the insurer must still assess your injury under the same rules.

A Hypothetical Example

Imagine a claimant in Western Sydney who suffered a soft tissue injury (threshold injury) after a car accident. The insurer initially assigned an assessor who classified the injury as a threshold injury. After 30 weeks, the insurer changes assessors, arguing the injury meets the whole person impairment threshold. The claimant must:

  • Request the new assessor's reasoning.
  • Provide medical evidence showing the injury does not meet the impairment threshold.
  • Challenge the change through SIRA or NCAT.

When to Seek Advice

If your insurer changes assessors without a valid reason, or if you believe the new assessment is unfair, contact a legal professional. While this article explains the process, your circumstances may require tailored advice.

Next Steps

CTP entitlements depend on the accident date, injury type, and insurer compliance with the MAIA. To request contact about your circumstances, complete the quick, no obligation enquiry form.

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