Option 1: Specialist Insurers – Companies like Cigna Global, AllClear, and Staysure specialize in covering pre-existing conditions with loading (surcharge) or waiting periods.

Option 2: Moratorium Policies – No medical questions upfront; conditions become covered after 2-5 years without treatment.

Option 3: Accept Exclusions – Get standard coverage for everything else while your specific condition remains excluded. Often the most affordable route.

68+

JCI-accredited facilities in Thailand

50-70%

Savings vs Western healthcare

#1

Medical tourism destination in Asia

✗ Typically IS Pre-Existing

• Chronic conditions requiring ongoing medication
• Conditions you’ve consulted a doctor about recently
• Symptoms you experienced but didn’t get checked
• Pending test results or scheduled procedures
• Conditions you’re “monitoring” without active treatment

✓ Typically NOT Pre-Existing

• Conditions fully resolved years ago (if outside look-back)
• Routine check-ups with no issues found
• Vaccinations and preventive care
• Conditions diagnosed after policy start date
• Injuries or illnesses with no prior symptoms

1. EXCLUSION

Condition not covered at all. Claims related to it are denied. Most common approach.

2. WAITING PERIOD

Condition covered after 6-24 months without claims. Risk shifts to insurer over time.

3. LOADING (SURCHARGE)

Higher premium (10-100%+) but full coverage from day one. Best for serious conditions.

4. FULL COVERAGE

Rare. Some minor conditions (like well-controlled cholesterol) may be covered at standard rates.

📋 Full Medical Underwriting

You complete a detailed medical questionnaire. The insurer reviews everything and decides what to cover, exclude, or load.

Best for: Those who want certainty upfront. You know exactly what’s covered before any incident happens.

⏳ Moratorium Underwriting

No medical questions at application. All conditions treated in the past 2-5 years are automatically excluded. If you go 2-5 years without treatment for a condition, it becomes covered.

Best for: Those with minor conditions who expect them to remain stable. Simpler application, but uncertainty at claim time.

✅ Apply When Your Condition is Stable

If you’ve just had a health event, wait until things stabilize and you have clean follow-up reports before applying. A few months of documented stability can make a significant difference to underwriting outcomes.

✅ Get a Doctor’s Letter

A letter from your doctor confirming your condition is well-controlled, you’re compliant with treatment, and there are no concerning symptoms can help your application considerably.

✅ Consider Higher Deductibles

Accepting a higher deductible (the amount you pay before insurance kicks in) can reduce premiums significantly. If your condition is well-controlled and unlikely to need treatment, this can work in your favor.

💡 Accept Exclusions for Full Coverage Elsewhere

A policy that excludes your diabetes but covers heart attacks, strokes, accidents, and everything else is better than no policy at all. You can manage the excluded condition separately.

💡 Consider Moratorium Policies

If your condition has been stable for years and you’re confident it will remain so, moratorium policies can be more affordable. Your condition becomes covered after 2-5 years without treatment.

💡 Apply to Multiple Insurers

Different insurers have different risk appetites. One may exclude your condition entirely while another offers coverage with a loading. It’s worth getting quotes from several before deciding.

❌ CLAIM DENIED

Your claim can be rejected entirely, leaving you with the full bill.

❌ POLICY VOIDED

Your entire policy can be cancelled retroactively, as if it never existed.

❌ BLACKLISTED

Non-disclosure can be recorded, making future insurance applications more difficult.

🏥 World-Class Hospitals: Thailand has over 68 JCI-accredited medical facilities—more than any other country in Southeast Asia. Bangkok’s hospitals like Bumrungrad, Bangkok Hospital, and Samitivej offer treatment that matches international standards.

💰 Affordable Care: Medical costs in Thailand are typically 50-70% lower than in the US and Western Europe, according to published research. This makes managing chronic conditions more affordable, even with insurance loadings.

🌏 Medical Tourism Hub: Thailand is the number one destination for medical tourism in Asia. The healthcare system is experienced in treating international patients and English is widely spoken in major hospitals.

Can I get insurance if I have diabetes?

Yes, but coverage varies. Diet-controlled Type 2 diabetes is often coverable with waiting periods or small loadings. Insulin-dependent diabetes is more challenging—specialist insurers like Cigna Global or AllClear are your best options. Type 1 diabetes is typically excluded or comes with significant loadings.

What’s the difference between a waiting period and an exclusion?

An exclusion means the condition is never covered under your policy. A waiting period means the condition isn’t covered initially, but becomes covered after a specified time (typically 6-24 months for health insurance) without claims or treatment for that condition.

How much more will I pay with a pre-existing condition?

Loading (premium surcharges) typically range from 10-25% for mild conditions like controlled hypertension, 25-50% for moderate conditions like stable diabetes, and 50-100%+ for serious conditions like heart disease history. Some conditions result in exclusion rather than loading.

Do I need to declare conditions that are fully cured?

It depends on the look-back period and the specific questions asked. If a questionnaire asks about conditions “ever” diagnosed, you must disclose. If it asks about conditions in the “last 2 years” and yours was resolved 5 years ago, you may not need to. Read questions carefully and when in doubt, disclose.

Can I get O-A retirement visa insurance with pre-existing conditions?

It’s challenging. OIC-approved Thai insurers are generally stricter than international providers. Many applicants with significant conditions find they’re excluded or declined. Options include combining minimal OIC-compliant coverage with supplementary international insurance for broader protection.

What if I develop a condition after my policy starts?

Conditions that develop after your policy starts are generally covered—that’s what insurance is for. However, some policies have initial waiting periods (e.g., 90 days) during which new conditions aren’t covered. Check your policy terms.

Will my insurance cover complications from a pre-existing condition?

If your condition is excluded, complications arising from it are typically also excluded. For example, if diabetes is excluded and you develop diabetic retinopathy, that would likely not be covered. However, if you have a heart attack with no prior cardiac history, that should be covered even if you have other pre-existing conditions.

Are mental health conditions treated differently?

Often, yes. Many travel insurers exclude mental health entirely. Health insurers may cover stable, treated conditions like mild anxiety or depression after waiting periods, but serious conditions like bipolar disorder or schizophrenia are frequently excluded.

How long do I need to be cancer-free to get coverage?

Requirements vary significantly. Travel insurers may require 2-5 years cancer-free. Health insurers often require 5-10 years. Some specialist insurers cover cancer survivors sooner with high loadings. “Cancer-free” typically means no treatment, no monitoring for recurrence, and no ongoing medication related to the cancer.

Should I use an insurance broker for pre-existing conditions?

Often yes. A good broker knows which insurers are most flexible for specific conditions and can save you time by approaching the right companies first. They can also help with the application process and sometimes negotiate better terms. Brokers are typically paid by insurers, not by you.

What’s the best approach if I have multiple conditions?

Multiple conditions complicate underwriting but don’t make coverage impossible. Be comprehensive in your disclosure, focus on specialist insurers with experience in complex cases (Cigna Global, Allianz), and consider whether accepting some exclusions while covering other conditions might work for you.

Can I change insurers if my conditions improve?

Yes, but be careful. If you’ve had continuous coverage and your condition has been stable, some new insurers may offer better terms. However, switching means undergoing underwriting again, and conditions that developed since your original policy started become pre-existing for the new policy.