Appeals and Billing Disputes

Step 1: Get the denial in writing

When your insurer denies a claim or refuses to cover a treatment, they are legally required to provide a written explanation (Verfügung / décision). This document must state:

• The specific reason for the denial
• The legal basis (which provision of KVG or KVV they are relying on)
• Your right to appeal and the deadline for doing so

If you received a verbal denial or a vague letter without specific legal reasoning, request a formal written decision (formelle Verfügung). You are entitled to this and your insurer must provide it.

Step 2: Understand the legal basis

Before challenging a denial, understand why it was made. The most common reasons insurers deny claims under KVG:

• Treatment not on the benefits list: KVG covers a defined catalogue of treatments. Some newer or alternative therapies are excluded
• Not medically necessary (WZW criteria): Treatment must be wirksam (effective), zweckmässig (appropriate), and wirtschaftlich (cost-effective). If your insurer says a treatment fails one of these criteria, they can deny it
• Wrong provider: If you are on an HMO, Hausarzt, or Network model and you saw a provider outside your network without a referral, the insurer can refuse coverage
• No pre-approval (Kostengutsprache): Certain expensive treatments (e.g., rehabilitation, some dental work, certain medications) require advance approval from your insurer. Without it, coverage can be denied retroactively
• Treatment abroad: KVG generally does not cover elective treatment outside Switzerland unless it was an emergency or was pre-approved

Step 3: Contact the Ombudsman (free mediation)

The Ombudsman of Health Insurance (Ombudsman der Krankenversicherung / Ombudsman de l'assurance-maladie) is a free, independent mediation service that helps resolve disputes between patients and insurers. This is your most important resource.

• Website: om-kv.ch
• Phone: 041 226 10 10
• Cost: Free of charge
• Languages: German, French, Italian

The Ombudsman mediates between you and your insurer. They review the facts, explain your rights, and often negotiate a resolution. Many disputes are resolved at this stage without needing to go further. You can contact them by phone, email, or through their online form.

Step 4: File a formal complaint with the cantonal court

If mediation through the Ombudsman does not resolve the issue, you can file a formal complaint with your cantonal insurance court (kantonales Versicherungsgericht / tribunal cantonal des assurances). Key points:

• Deadline: You usually have 30 days from the date of the insurer's formal denial (Verfügung) to file your complaint. Do not miss this deadline
• Cost: Court proceedings for insurance disputes are often free for amounts up to CHF 20,000. Above this threshold, modest court fees may apply
• Lawyer: You do not need a lawyer for cantonal insurance court proceedings, but one can help for complex cases. Legal aid (unentgeltliche Rechtspflege) is available if you cannot afford representation
• Process: The court reviews the insurer's decision, your medical documentation, and the applicable law. You may be asked to provide additional medical evidence

Billing disputes with clinics and hospitals

If your dispute is not with the insurer but with a medical provider's bill, the process is different:

1. Contact the billing department: Call or write to the clinic's billing office (Rechnungsabteilung / service de facturation). Request an itemised invoice (detaillierte Rechnung) showing each individual service. Errors in billing are not uncommon
2. Involve your insurer: Send the disputed invoice to your insurer and ask them to review it. Insurers regularly audit medical bills and can identify overcharges
3. Contact the cantonal medical association: If the clinic does not cooperate, you can file a complaint with your canton's medical association (Ärztegesellschaft / société médicale). They can investigate whether the billing is in line with the Tarmed tariff system or other applicable fee schedules

Ongoing treatment during a dispute

An important protection under Swiss law: while a dispute about a specific treatment is ongoing, your insurer must generally continue covering treatment that is already underway. They cannot cut off coverage for an ongoing course of treatment simply because a dispute has been filed. This applies particularly to:

• Ongoing medication that was previously approved
• Therapy series (e.g., physiotherapy, psychotherapy) already in progress
• Post-operative follow-up care