For the diagnosis-specific Budapest criteria and NSW permanent impairment method, read the CRPS diagnosis and WPI guide. This page focuses on treatment, capacity and claim-management disputes.
Overview
A NSW CRPS claim is strongest when diagnosis, objective Budapest criteria signs, treatment history, and work-capacity evidence are organised together.
If the insurer disputes CRPS, first identify whether the dispute is about diagnosis, causation, treatment, WPI, or capacity. Then answer that issue with specialist pain evidence, treating records, functional history, and the written insurer reasons.
Why CRPS evidence is examined closely
A CRPS dispute may concern diagnosis, causation, treatment, work capacity or permanent impairment. Each issue requires evidence directed to its own test; pain severity alone does not establish the diagnosis or a WPI value.
What to do when CRPS is being disputed
- Ask for the insurer's full written reasons and all relied-on medical documents (not just a phone summary).
- Get your treating team to address Budapest findings directly: hyperalgesia, allodynia, temperature asymmetry, edema/sudomotor changes, and motor/trophic signs.
- Prepare a short timeline showing pre-injury function, post-injury decline, treatment response, and current work-capacity limits.
- If treatment was denied, respond on "reasonably necessary" grounds with objective function impact and failed lower-intensity alternatives.
What is CRPS?
Complex Regional Pain Syndrome (CRPS) is a chronic pain condition that usually affects one limb after trauma. It can involve severe pain, temperature change, swelling, motor dysfunction, and progressive functional loss that affects work capacity, treatment needs, and long-term compensation strategy.
The Budapest Criteria: proving diagnosis evidence
Clinicians may use the internationally recognised Budapest Criteria when diagnosing CRPS. That clinical diagnosis is not itself a permanent impairment percentage. For NSW WPI, the assessor must also apply Chapter 17 of the NSW Guidelines, including its diagnostic, duration, verification and stability requirements. Medical evidence should record symptoms and observable signs by domain:
1. Sensory
Hyperalgesia or allodynia supported by careful clinical examination.
2. Vasomotor
Temperature asymmetry or skin colour changes between limbs.
3. Sudomotor/Edema
Swelling, sweating changes, or edema patterns in the affected region.
4. Motor/Trophic
Reduced movement, weakness, tremor, or trophic changes in nails, skin, or hair.
For NSW permanent impairment assessment, Table 17.1 requires reported symptoms and observed signs across all four domains. CRPS type 1 must also have been present for at least one year, be verified by more than one examining physician, and not be better explained by another diagnosis. CRPS type 2 additionally requires objective injury to a specific nerve. These are impairment-assessment requirements; a treating clinician may use diagnostic criteria for a different clinical purpose.
Has the insurer rejected your specialist CRPS diagnosis?
Generic chronic-pain wording may not address whether the NSW CRPS diagnostic and permanent impairment criteria are satisfied.
Impairment ratings and CRPS
NSW does not use AMA5 Chapter 18 to add a generic pain value. CRPS is assessed under the specific NSW Guidelines method only when the required diagnostic and stability criteria are met. The assessor then measures the permitted extremity impairments and converts them to WPI.
A report should identify the diagnostic findings, the stable impairment measurements, the conversion method and any prohibited combination. Related nerve injury, secondary psychological symptoms and work incapacity may need separate legal analysis and do not automatically increase the CRPS WPI.
CRPS assessment illustration
In an illustrative upper-limb case, the assessor first confirms that the NSW CRPS criteria and required period of stability are met. Valid loss of joint motion and the permitted sensory or pain-related extremity value are calculated under the upper-extremity method, combined where the Guidelines allow, and then converted from upper-extremity impairment to WPI. The assessor does not add a separate AMA5 Chapter 18 pain percentage.
What does not establish CRPS WPI
- Pain severity alone or a chronic-pain label.
- Symptoms without the required clinical signs and diagnostic criteria.
- An early CRPS I assessment before the NSW stability requirement is satisfied.
- A generic functional limitation or an AMA5 Chapter 18 pain rating.
This example explains the method only and is not a predicted rating. Source: NSW permanent impairment Guidelines, Chapter 17 (CRPS).
Current process
Permanent impairment assessments from 1 July 2026 to mid-2027
NSW is in an interim period. Separate examinations arranged by the worker and insurer can still occur, but an interim assessment must be performed by an assessor on SIRA's register. Liability for the injury must have been determined before an interim assessment is made.
Independent legal advice is compulsory
A worker must receive independent legal advice about the full legal implications before being seen by a permanent impairment assessor. Advice is also required before entering an impairment agreement.
The assessment can affect several entitlements
The principal assessment is used across weekly payments, medical and related treatment expenses, Section 66 lump sum compensation, commutation access and work injury damages. It is not only a lump sum calculation.
Agreement or medical dispute
If the worker and insurer agree on the degree of impairment, they may enter a written impairment agreement. If they do not agree, the insurer must give written notice and either party may refer the disagreement to the Personal Injury Commission as a medical dispute, supported by medical evidence.
A further assessment is tightly restricted
A second or later assessment during the interim period requires agreement that there appears to be unexpected and material deterioration. The deterioration must be capable of increasing the impairment by at least a further 10 percentage points. Ordinary age-related deterioration does not meet that test.
Last reviewed 20 July 2026. Sources: SIRA worker guidance and SIRA interim assessment guidance. See also the PIC dispute guide.
Serious injury, high needs, and long-term payment consequences
For a physical CRPS injury under the usual physical-injury pathway, a valid WPI assessment may affect the section 32A categories and the operation of section 39. The claim date, injury notification date and transitional provisions still need to be checked. This is not a shortcut for a primary psychological injury, and no particular payment or treatment outcome follows automatically from the CRPS diagnosis.
Treatment rights for CRPS
Section 60 may require reasonably necessary CRPS treatment to be paid where liability and the statutory requirements are satisfied. Depending on the clinical evidence, treatment may include:
- Specialist pain medicine and multidisciplinary pain programs.
- Nerve blocks or infusion therapies.
- Spinal cord stimulation and related specialist interventions.
- Occupational therapy, graded rehabilitation, and capacity-based return-to-work planning.
What usually makes a CRPS dispute stronger?
The strongest CRPS files are not built on pain language alone. They connect diagnosis, treatment history, and functional decline with careful objective findings. That means clear diagnostic evidence, a consistent timeline after the original injury, specialist pain or rehabilitation opinions, and evidence addressing the specific conclusions in any insurer medical report.
If the insurer is disputing causation, treatment, or work capacity at the same time, you should also reviewunfair IME report strategy,treatment denial disputes, andwork capacity decisions.
CRPS claim FAQs (NSW)
Can I dispute an insurer decision that says my CRPS is psychological?
Yes. The insurer’s reasoning can be addressed with specialist pain evidence, treating records and objective clinical findings that align with the Budapest Criteria. The appropriate review or dispute pathway depends on the decision and evidence.
Do I need an independent medical exam to progress a CRPS claim?
Not in every matter. An insurer may request an independent medical examination, but the report can be examined against the treating evidence, diagnostic criteria and recorded clinical findings.
Can CRPS affect weekly payments as well as lump sum rights?
Potentially. CRPS may affect work capacity, treatment needs and permanent impairment, but each entitlement has its own evidence and legal requirements.
General information only
General information only. This page is not legal advice and is not a substitute for legal advice tailored to your circumstances.
Related CRPS, treatment, and dispute guides
Request a CRPS claim check
Send us the insurer decision and a short summary if you need help identifying the next practical step for diagnosis, treatment, capacity or permanent impairment issues.