The Good News: Basic Insurance Cannot Refuse You
If you have a pre-existing condition and you are moving to Switzerland, here is the most important thing to understand: no basic health insurer can refuse you. Under the KVG (Federal Health Insurance Act), every insurer offering mandatory basic insurance (Grundversicherung) must accept every applicant — regardless of age, health status, or medical history. There are no health questionnaires, no exclusion clauses, and no premium surcharges based on your health.
This is one of the strongest consumer protections in global healthcare. Whether you have diabetes, a history of cancer, a chronic heart condition, or any other pre-existing illness, your basic insurance covers you exactly the same as someone in perfect health. The premiums are identical for the same age group, canton, and franchise level.
Key Principle
Swiss basic insurance (KVG/OKP) operates on the solidarity principle. Everyone in the same premium region pays the same rate regardless of health. There is no medical underwriting, no risk assessment, and no right to refuse. This applies to all 50+ insurers offering basic coverage.
The Catch: Supplementary Insurance Can Refuse You
While basic insurance is guaranteed, supplementary insurance (Zusatzversicherung) is a completely different story. Supplementary insurance operates under the VVG (Federal Insurance Contract Act) — private contract law — and insurers have full discretion to accept, refuse, or conditionally accept applicants.
When you apply for supplementary insurance, you will be required to fill out a health questionnaire (Gesundheitsfragebogen). This form asks about your current health status, past diagnoses, ongoing treatments, medications, hospitalisations in the last five to ten years, and any planned medical procedures.
Based on your answers, the insurer can:
- Accept you with full coverage (no restrictions)
- Accept you with exclusions (Vorbehalte) — specific conditions are excluded from coverage, often for five years
- Accept you with a premium surcharge — you pay more because of your health risk
- Reject you outright — they simply decline to insure you
What Typically Gets Excluded or Triggers Rejection
| Condition Category | Typical Insurer Response | Examples |
|---|---|---|
| Chronic conditions | Exclusion for 5 years or rejection | Diabetes, Crohn’s disease, rheumatoid arthritis, MS |
| Mental health | Exclusion or rejection (very strict) | Depression, anxiety disorder, burnout, ADHD treatment |
| Musculoskeletal issues | Exclusion for related treatments | Chronic back pain, herniated disc, knee surgery history |
| Cardiovascular | Exclusion or premium surcharge | Hypertension, arrhythmia, prior heart surgery |
| Allergies (mild) | Usually accepted, sometimes exclusion | Hay fever, mild asthma, food allergies |
| Planned procedures | Rejection until procedure is completed | Scheduled surgery, planned orthodontics |
Mental health history is one of the most difficult areas. Even a short course of therapy or antidepressant use can lead to exclusions or rejection for supplementary insurance. Insurers view psychiatric history as a high-cost risk.
What Counts as a Pre-existing Condition?
In the context of Swiss supplementary insurance, a pre-existing condition is anything that has been diagnosed, treated, or investigated by a medical professional before the insurance application date. This includes:
- Any diagnosis in your medical records, even if you consider it resolved
- Medications you are currently taking or have recently taken
- Specialist referrals or investigations, even if the result was normal
- Hospitalisations, surgeries, or outpatient procedures
- Ongoing physiotherapy, psychotherapy, or other therapeutic treatments
- Conditions your doctor noted in your file, even if you were unaware
The critical detail: it does not matter whether the condition is currently active. If it appears in your medical history within the questionnaire’s lookback period (typically 5 to 10 years), you must declare it.
Warning
Do not omit conditions from the health questionnaire. Swiss law requires you to answer truthfully. If the insurer later discovers an undisclosed pre-existing condition, they can retroactively void your supplementary policy, refuse all related claims, and potentially pursue legal action. The consequences of non-disclosure are far worse than an exclusion clause.
Strategy for Expats with Pre-existing Conditions
Step 1: Secure Your Basic Insurance First
You have 3 months from your date of registration in Switzerland to enrol in basic insurance. This is mandatory and guaranteed — no one can refuse you. Choose your insurer based on premiums, service quality, and insurance model (Hausarzt, Telmed, HMO, or standard). Your pre-existing conditions are irrelevant here.
Step 2: Apply for Supplementary Insurance as Early as Possible
This is where timing matters enormously. The ideal scenario is to apply for supplementary insurance before a condition is diagnosed. Once something is in your medical records, it cannot be undone. If you are generally healthy when you arrive in Switzerland, apply for supplementary insurance immediately — even if you think you do not need it yet.
Step 3: Apply to Multiple Insurers Simultaneously
Different insurers have different risk appetites. One insurer might reject you for a condition that another accepts with a simple exclusion. It is entirely legal and common to submit applications to three or four supplementary insurers at the same time and then choose the best offer.
Step 4: Negotiate Exclusions
If an insurer offers you coverage with exclusions, you can sometimes negotiate. Ask whether the exclusion has a time limit (commonly 5 years). After the exclusion period, the condition is fully covered — assuming it has remained stable. Some insurers will also reconsider exclusions if you provide a detailed medical report showing the condition is well-managed.
The Timing Principle: Apply Before Diagnosis
The single most valuable piece of advice for expats is this: apply for supplementary insurance while you are healthy. This is not about gaming the system — it is about protecting your future options.
Consider this scenario: You arrive in Switzerland at age 30, feeling fine. You skip supplementary insurance because you think basic coverage is enough. At age 35, you are diagnosed with a chronic condition. You now want private hospital coverage or complementary medicine coverage. Every supplementary insurer either rejects you or excludes the condition for five years.
Had you applied at age 30, you would have been accepted with full coverage, and the later diagnosis would be covered as a new condition under your existing policy.
| Scenario | Supplementary Insurance Outcome |
|---|---|
| Apply at age 30, healthy | Full acceptance, no exclusions — future conditions covered |
| Apply at age 35, after diagnosis | Exclusion for 5 years or outright rejection |
| Apply at age 40, multiple conditions | Likely rejected by most insurers |
How to Handle the Health Questionnaire
Be Completely Honest
Answer every question truthfully and completely. The questionnaire is a legal document. Providing false or incomplete information gives the insurer grounds to void your policy retroactively — even years later when you file a claim.
Be Precise, Not Excessive
Answer exactly what is asked. If the question is “Have you been hospitalised in the last 5 years?”, answer about hospitalisations in the last 5 years — do not volunteer information about a hospital visit 8 years ago unless specifically asked. If the question asks about “current medications”, list what you currently take, not what you took three years ago.
Include Supporting Documentation
If you have a condition that might raise concerns, proactively include a medical report from your doctor explaining the current status. A letter stating “condition X has been stable and well-managed for 3 years, with normal test results” can make the difference between an exclusion and full acceptance.
Each Insurer Has Its Own Questionnaire
Health questionnaires vary between insurers. Some ask about the last 5 years, others about the last 10. Some ask very specific questions; others are broader. This is another reason to apply to multiple insurers — the questions may work in your favour depending on your medical timeline.
What Basic Insurance Covers for Pre-existing Conditions
Even without supplementary insurance, your basic coverage is comprehensive. The KVG covers all medically necessary treatments, including:
- GP and specialist consultations
- Hospital stays in the general ward of your canton’s hospitals
- Prescription medications on the approved list (Spezialitaetenliste)
- Chronic disease management (diabetes supplies, regular monitoring, etc.)
- Cancer treatment (chemotherapy, surgery, radiation)
- Mental health treatment (psychiatry sessions, though limited in number per year without prior approval)
- Physiotherapy (with a doctor’s referral)
- Maternity care (entirely franchise-free)
The key limitation is that basic insurance covers treatment in the general ward only. If you want a private or semi-private hospital room, free choice of doctor in hospital, or complementary medicine like acupuncture and osteopathy, you need supplementary insurance.
Have a pre-existing condition and need guidance?
Book a free consultation — we help expats navigate Swiss health insurance, including supplementary applications with pre-existing conditions.
Frequently Asked Questions
Can a Swiss health insurer refuse me because of a pre-existing condition?
For basic insurance (Grundversicherung/OKP): no, never. Every insurer must accept you regardless of health status. For supplementary insurance (Zusatzversicherung): yes. Supplementary insurers can refuse you, exclude specific conditions, or charge higher premiums based on your health questionnaire answers.
Do I have to declare pre-existing conditions for basic insurance?
No. Basic insurance involves no health questionnaire and no medical underwriting. You simply register, choose your franchise and model, and you are covered. Health declarations are only required for supplementary insurance.
What happens if I lie on the supplementary insurance health questionnaire?
If the insurer discovers the omission — often when you file a claim — they can retroactively void your policy, refuse all related claims, and potentially pursue damages. Swiss courts consistently uphold insurers’ right to void policies for non-disclosure, even for seemingly minor omissions.
Can I get supplementary insurance removed exclusions later?
Yes, in many cases. Exclusions (Vorbehalte) are typically limited to 5 years. After that period, the condition is fully covered under your policy. Some insurers may remove exclusions earlier if you can demonstrate the condition has been stable and requires no ongoing treatment.
Should I apply for supplementary insurance even if I am healthy?
Yes, strongly recommended. Applying while healthy means you will be accepted without exclusions. If your health changes later, your existing supplementary policy covers the new condition. Waiting until you need coverage often means you cannot get it — or you get it with significant restrictions.
Does switching basic insurers affect my pre-existing condition coverage?
No. Since basic insurers cannot refuse anyone or apply health-based restrictions, switching has no impact on your coverage of pre-existing conditions. You retain the exact same benefits regardless of which basic insurer you choose. This only applies to basic insurance — switching supplementary insurers does require a new health questionnaire.
Is mental health treatment covered under basic insurance?
Yes. Basic insurance covers psychiatry and, since the 2022 reform, also psychotherapy by licensed psychologists with a doctor’s referral. The first 15 sessions are covered without prior approval. Beyond that, your insurer may require a cost approval (Kostengutsprache). This coverage applies regardless of pre-existing mental health conditions.
Insurance Guide
Our editorial team has over 15 years of experience in the Swiss insurance market and has helped over 2,500 clients navigate the federal KVG system.
