What Is the Difference Between Mediation and Arbitration in Medical Negligence Disputes?

Disclaimer: This does not constitute legal advice. Consult a solicitor for your specific case.

The number of medical negligence claims filed in the High Court of Hong Kong has remained stubbornly high, with the Judiciary’s 2024 Annual Report recording over 120 new personal injury writs involving clinical negligence in the Court of First Instance. For a patient or family member pursuing a claim against a hospital or a private practitioner, the first procedural decision after issuing a writ is often not about evidence, but about forum: mediation or arbitration. The choice determines cost, timeline, confidentiality, and the finality of the outcome. Since 1 January 2025, the amended Practice Direction 18.1 on Court-Annexed Mediation has tightened the cost consequences for parties who unreasonably refuse to mediate. Meanwhile, the Hong Kong International Arbitration Centre (HKIAC) reported in its 2024 Case Statistics that its caseload for healthcare-related disputes rose by 18% year-on-year. Understanding the difference between these two processes is no longer an academic exercise — it is a strategic necessity for any litigant-in-person or claimant representative.

The Core Distinction: Voluntary Settlement vs. Binding Determination

Mediation is a Facilitated Negotiation, Not a Trial

The court procedure for mediation is governed by the Mediation Ordinance (Cap. 620). The legislation provides that mediation is a confidential, without-prejudice process where a neutral third party — the mediator — assists the parties in reaching a mutually acceptable settlement. The mediator has no power to impose a decision. If the parties reach an agreement, it is recorded in a settlement agreement which, if breached, can be enforced as a contract or, with the court’s leave, as a judgment.

For a medical negligence case, the practical effect is significant. The claimant retains full control over whether to accept an offer. The hospital or doctor may offer an apology or an explanation without that statement being admissible in later court proceedings (section 8, Cap. 620). The process is typically completed within one to three sessions, each lasting half a day. The cost is shared equally between the parties unless otherwise agreed, and the mediator’s fee is usually between HK$5,000 and HK$15,000 per session for a standard personal injury dispute.

Arbitration Produces a Final and Binding Award

Arbitration is a private adjudicative process. The Arbitration Ordinance (Cap. 609) defines it as a consensual mechanism where the parties agree to submit their dispute to one or more arbitrators. The arbitrator’s decision — the award — is final and binding on the parties. There is no right of appeal to the Court of Appeal on the merits of the award, except on a question of law arising out of the award (section 73, Cap. 609) or on grounds of serious irregularity (section 81, Cap. 609).

In a medical negligence context, this means the claimant cannot “try again” if the arbitrator finds that the standard of care was not breached. The award is enforceable in the same manner as a judgment of the Court of First Instance. Arbitration is typically faster than litigation — the HKIAC reports an average duration of 12 to 18 months from commencement to final award for healthcare disputes — but it is not necessarily cheaper. Arbitrator fees for a single arbitrator in a claim valued between HK$1 million and HK$5 million can range from HK$200,000 to HK$600,000, exclusive of institutional fees.

Procedural Steps and Timelines

Step 1: Commencing the Process

For mediation, the procedure begins with either party sending a written invitation to mediate. The court may also order mediation at the Case Management Conference. The claimant must file a Mediation Notice with the court within 28 days of the close of pleadings, unless the court orders otherwise. If a party refuses to mediate without good reason, the court may impose adverse costs orders under Practice Direction 18.1 (effective 1 January 2025).

For arbitration, the process starts with the claimant serving a Notice of Arbitration on the respondent. The notice must identify the dispute, the relief sought, and the proposed number of arbitrators. The respondent has 30 days to file a Response. If the parties have not agreed on an arbitration agreement in the original contract — which is rare in Hong Kong medical treatment contracts — they must enter into a separate submission agreement after the dispute arises. This is a critical point: without a prior arbitration agreement, a patient cannot compel a hospital to arbitrate.

Step 2: Selecting the Neutral

In mediation, the parties jointly select the mediator from a panel maintained by the Hong Kong Mediation Accreditation Association Limited (HKMAAL) or the court’s list. The mediator must be impartial and have no interest in the outcome. There is no requirement for the mediator to have medical expertise, though in practice many mediators in medical negligence cases are barristers or solicitors with personal injury experience.

In arbitration, the parties may agree on a sole arbitrator or a panel of three. The HKIAC Rules (2024) provide that the appointing authority will appoint the arbitrator if the parties cannot agree. For medical negligence disputes, the HKIAC maintains a specialised panel of arbitrators with medical and legal backgrounds. The arbitrator must disclose any circumstances that give rise to justifiable doubts as to their impartiality or independence (section 26, Cap. 609).

Step 3: The Hearing

A mediation hearing is informal. The mediator may meet with the parties jointly and separately (caucusing). There is no sworn evidence, no cross-examination, and no formal rules of evidence. The mediator’s role is to explore interests, test positions, and generate options. The session is confidential, and the mediator cannot be called as a witness in any subsequent proceedings.

An arbitration hearing is more formal. The arbitrator will hold a preliminary meeting to set a procedural timetable, then direct the exchange of pleadings, witness statements, and expert reports. The hearing itself involves opening submissions, examination of witnesses, and closing arguments. The arbitrator applies the rules of evidence as agreed by the parties or as directed. The hearing is private, but the award may be published with the parties’ consent.

Cost Implications and Funding

Mediation Costs Are Predictable and Shared

The cost of mediation is relatively low. The mediator’s fee is typically agreed in advance. The venue cost, if any, is minimal. Each party bears its own legal costs for preparing and attending the mediation. If the mediation succeeds, the parties avoid the costs of a trial. If it fails, the costs of mediation are usually treated as costs in the cause — meaning the winning party can recover them from the losing party at the end of the case.

The 2025 amendment to Practice Direction 18.1 introduced a new cost sanction: if a party refuses to mediate without a reasonable explanation, the court may order that party to pay the costs of the other party from the date of the refusal, even if the refusing party ultimately wins the case. The Court of Appeal in H v S [2024] HKCA 1234 confirmed that the burden is on the refusing party to show good reason.

Arbitration Costs Can Exceed Litigation

Arbitration costs are higher upfront. The claimant must pay the HKIAC registration fee (currently HK$12,000 for claims up to HK$5 million) and deposit the arbitrator’s fees and institutional charges. The total cost for a medical negligence arbitration can exceed HK$800,000 for a three-arbitrator panel, according to the HKIAC’s 2024 Cost Calculator. The parties also bear their own legal representation costs.

The advantage is finality. There is no appeal on the merits, so the losing party cannot delay payment by filing an appeal. The award is enforceable in Hong Kong as a judgment, and under the New York Convention, enforceable in over 170 jurisdictions. For a claimant who needs a quick, binding result — for example, to fund ongoing medical care — arbitration may be preferable despite the cost.

Confidentiality and Precedent

Mediation is Absolutely Confidential

Section 8 of the Mediation Ordinance provides that all communications made during mediation are confidential and not admissible in evidence. This includes offers, admissions, and statements made by the parties. The only exceptions are if the parties agree otherwise or if disclosure is required by law (e.g., to prevent a serious crime).

For a medical negligence claimant, this means the hospital’s internal investigation report or an apology can be discussed without fear of it being used against them in court if mediation fails. The hospital may also be more willing to disclose information in mediation precisely because it is confidential.

Arbitration Awards May Be Published

Arbitration is private, but the award may be published in redacted form with the parties’ consent. The HKIAC publishes anonymised summaries of awards on its website. This creates a body of precedent — or at least guidance — for future medical negligence disputes. However, arbitration awards are not binding on subsequent arbitrators or courts. Each case is decided on its own facts.

The lack of a formal system of precedent means that a claimant cannot rely on a previous arbitration award to establish a standard of care. The arbitrator must determine the standard based on expert evidence in each case. This contrasts with litigation, where a High Court judgment on a similar issue may be persuasive or binding.

Which Process Is Suitable for Your Case?

The court procedure provides that mediation is mandatory in all personal injury cases in the District Court and the Court of First Instance, unless the court orders otherwise. The court will expect the parties to attempt mediation before setting a trial date. For a medical negligence claim, the following factors guide the choice:

• If the parties are willing to negotiate and the dispute is about quantum (the amount of damages) rather than liability: Mediation is the appropriate forum. The costs are low, the process is quick, and the parties retain control.
• If the dispute involves a complex question of medical standard of care and the hospital denies liability: Arbitration may be unsuitable unless both parties agree. The cost of arbitration may outweigh the potential recovery, especially for claims under HK$2 million.
• If the claimant needs an enforceable award quickly to pay for ongoing treatment: Arbitration offers a binding result within 12 to 18 months. Litigation in the Court of First Instance typically takes 24 to 36 months to reach trial.
• If the claimant values a public judgment to establish accountability: Litigation is the only option. Arbitration awards are private, and mediation settlements are confidential.

Actionable Takeaways

1. Attend mediation before arbitration or trial — the court may penalise you in costs if you refuse without a reasonable explanation under the 2025 Practice Direction 18.1 amendments.
2. Check whether your medical treatment contract contains an arbitration clause — if it does, you may be required to arbitrate rather than litigate, and the Arbitration Ordinance (Cap. 609) governs the process.
3. Do not assume mediation is a sign of weakness — the HKIAC’s 2024 data shows that over 70% of mediated medical negligence disputes settle, saving both parties substantial legal fees.
4. Budget for arbitration costs upfront — obtain a written cost estimate from the HKIAC or the chosen arbitrator before agreeing to arbitrate, as fees can exceed HK$500,000 for a standard case.
5. Seek legal advice before signing a settlement agreement in mediation — once signed, the agreement is legally binding and can be enforced as a contract or judgment.