One of the most common questions I hear from people considering Phuket is: "I have [condition] — can I still get health insurance here?" The honest answer is: usually yes, but the coverage will have limitations. Understanding those limitations before you arrive is much better than discovering them in a hospital waiting room.
This guide explains how international health insurers treat pre-existing conditions, which companies operating in Phuket are most flexible, what your alternatives are if coverage is declined, and how the Non-OA visa insurance requirement interacts with this.
📋 In This Guide
- How Insurers Assess Pre-Existing Conditions
- Condition-by-Condition Coverage Guide
- Phuket Insurers Compared
- Moratorium Underwriting — How It Works
- Non-OA Visa Insurance & Pre-Existing Conditions
- What Pre-Existing Conditions Do to Your Premium
- Alternatives if Coverage Is Denied
- Tips for Getting the Best Coverage
- FAQ
How International Insurers Assess Pre-Existing Conditions
International health insurers use two main underwriting approaches for pre-existing conditions:
Full Medical Underwriting (FMU)
You disclose your full medical history at application. The insurer reviews and either: (a) accepts and covers everything, (b) accepts with a permanent exclusion for specific conditions, (c) accepts with a higher premium for specific conditions, or (d) declines. Most Cigna, AXA and Allianz applications use FMU.
Moratorium Underwriting (MU)
No medical history required at application. All conditions you had in the 5 years prior to coverage are automatically excluded for 2 years. If you have no symptoms, treatment or advice for a condition for 2 continuous years, the exclusion lifts. Popular with Pacific Cross and some Cigna plans.
Failing to disclose a pre-existing condition on a Full Medical Underwriting application is insurance fraud and can result in your policy being voided — leaving you with no coverage and no refund of premiums, potentially at the worst possible moment. Always disclose fully and accurately. The goal is to find the right policy, not to hide facts that will emerge when you make a claim.
Condition-by-Condition Coverage Guide
The coverage landscape varies significantly depending on the condition and its status. This is a general guide — individual insurer decisions vary.
Well-controlled conditions
Hypertension on stable medication, controlled Type 2 diabetes (HbA1c <7.5%), managed thyroid conditions, past (resolved) conditions
Chronic managed conditions
Asthma, controlled depression/anxiety, epilepsy (seizure-free), previous cancer (5+ years clear), controlled Crohn's, arthritis
High-risk conditions
Active/recent cancer, uncontrolled heart failure, ESRD/dialysis, HIV/AIDS, recent cardiac surgery, severe COPD, active MS progression
| Condition | FMU Likely Outcome | Moratorium Option | Realistic Expectation |
|---|---|---|---|
| Controlled hypertension | Covered or minor loading | 2-yr exclusion then covered | ✅ Manageable |
| Type 2 diabetes (controlled) | Exclusion or significant loading | 2-yr exclusion | ⚠️ Possible with exclusion |
| Asthma (mild/stable) | Often covered or excluded | 2-yr exclusion | ⚠️ Usually coverable |
| Depression (stable, medicated) | Mental health exclusion common | 2-yr exclusion | ⚠️ Mental health often excluded |
| Cancer (5+ years clear) | Varies significantly | 2-yr exclusion | ⚠️ Shop around carefully |
| Cancer (active/recent) | Declined or full exclusion | Not helpful — active condition | ❌ Standard insurance unlikely |
| Heart disease (post-surgery, stable) | Cardiac exclusion or decline | 2-yr exclusion | ❌ Very limited options |
| Obesity (BMI 30–35) | Loading possible; over 40 may decline | Standard | ⚠️ Some insurers loading above BMI 32 |
| HIV (controlled) | Declined by most standard insurers | Usually excluded | ❌ Specialist HIV insurance needed |
| Previous stroke (stable) | Cerebrovascular exclusion | 2-yr exclusion | ⚠️ Exclusion likely permanent for stroke-related claims |
Phuket-Relevant Insurers Compared for Pre-Existing Conditions
| Insurer | Underwriting Type | Pre-Existing Approach | Flexibility | Bangkok Hospital Network |
|---|---|---|---|---|
| Cigna Global | FMU (standard) / MU (some plans) | Individual assessment; may exclude condition-specific claims; some covered with loading | ⭐⭐⭐⭐ High | ✅ Direct billing |
| Pacific Cross | MU available + FMU | Moratorium option; conditions excluded for 24 months then reviewed | ⭐⭐⭐⭐ Good for MU | ✅ Direct billing |
| AXA Global Health | FMU | Detailed medical disclosure; may cover stable conditions after assessment | ⭐⭐⭐ Moderate | ✅ Direct billing |
| Allianz Care | FMU | Thorough underwriting; group plans more flexible than individual | ⭐⭐⭐ Moderate | ✅ Direct billing |
| BUPA Global | FMU + MU options | Good for moratorium — 2-year exclusion period | ⭐⭐⭐ Good | ✅ Direct billing |
| OIA (Non-OA visa) | Standard — no underwriting | Emergency only; pre-existing conditions explicitly excluded | ⭐ Visa compliance only | ❌ Cash payment |
How Moratorium Underwriting Works — A Practical Example
Say you have been managing asthma for 10 years and move to Phuket. With moratorium underwriting:
- You take out Pacific Cross with moratorium underwriting
- For the first 24 months, asthma-related claims are automatically excluded
- During those 24 months, you have no asthma symptoms, no inhaler prescriptions, no doctor consultations about asthma
- After 24 months, the exclusion lifts — asthma is now covered
- If during those 24 months you had an asthma flare-up and consulted a doctor, the 24-month clock resets
Moratorium underwriting is particularly useful for conditions that have been genuinely stable for years. It requires no disclosure at application, which makes it simpler — but it also means you must be honest with yourself about whether your condition is genuinely stable and whether you'll have any related consultations.
Non-OA Visa Insurance & Pre-Existing Conditions
If you are on a Non-OA retirement visa, Thailand requires OIA-approved health insurance with at least ฿40,000 outpatient and ฿400,000 inpatient coverage. OIA-approved policies are:
- Cheap (฿5,000–฿15,000/year)
- Designed for visa compliance, not real healthcare protection
- Explicitly exclude pre-existing conditions in their terms
- Cover accidents and emergency illness only
Most experienced Phuket-based Non-OA holders with significant health needs carry two policies: (1) A cheap OIA-approved policy purely for visa compliance (฿5,000–฿10,000/year) and (2) A private international health insurance policy (Cigna, Pacific Cross) for real coverage — with the pre-existing condition either covered after underwriting assessment, or managed through moratorium. The OIA policy satisfies immigration; the private policy provides actual protection.
What Pre-Existing Conditions Do to Your Premium
| Condition Type | Likely Premium Impact | Alternative |
|---|---|---|
| Controlled hypertension on stable meds | 0–30% loading, or condition-specific exclusion | Moratorium to lift exclusion after 2 clean years |
| Type 2 diabetes (HbA1c under 8) | 25–50% loading or diabetes exclusion | Moratorium if stable for 2+ years |
| History of mild mental health treatment | Mental health exclusion (common) | Self-pay for mental health; cover everything else |
| Cancer (5+ years clear) | Exclusion or 50–100% loading | Shop multiple insurers; FMU disclosure |
| Active serious condition | Decline | Self-insurance fund + cash-pay at Bangkok Hospital |
Alternatives if You Cannot Get Standard Coverage
If standard international health insurance is declined or quoted at prohibitive premiums for your pre-existing condition, Phuket is actually a relatively good place to be — because healthcare costs are significantly lower than in the UK, US, or Australia, making self-pay more viable.
- Self-insurance fund — Maintain ฿500,000–฿1,000,000 in a dedicated liquid account as your health emergency fund. Bangkok Hospital Phuket publishes transparent cash rates. An average inpatient stay is ฿30,000–฿80,000. Major surgery might be ฿200,000–฿500,000. Still far cheaper than UK or US equivalents.
- Partial coverage — Buy standard insurance that excludes your pre-existing condition. This still protects you from unrelated major health events (accident, unexpected illness).
- Vachira public hospital — For non-urgent care at Thai public rates (฿30–200 per consultation), Vachira Phuket on Yaowarat Road serves foreign nationals. Quality varies but costs are minimal for routine care.
- Bangkok Hospital Phuket patient account — Bangkok Hospital (076-254-425) offers patient account setups for long-term residents. Ask the IPS (International Patient Services) department about cash patient options.
- Medical evacuation only — Some specialists offer medical evacuation coverage even without full health insurance — covers getting you home if something catastrophic happens.
Getting the Best Coverage — Practical Tips
- Apply when healthy. The best time to get health insurance is when you're in good health. Premium loadings and exclusions multiply with age and additional conditions. Apply early in your Phuket planning.
- Use a broker, not direct. An independent insurance broker (not tied to one insurer) can compare multiple FMU applications and advise on which insurers are most likely to accept your specific condition. Bangkok-based brokers familiar with the Thai market are best.
- Consider moratorium for stable conditions. If your condition has been genuinely stable (no treatment, no symptoms, no prescriptions) for 2+ years, moratorium underwriting may result in coverage after the exclusion period that FMU would never provide.
- Keep all medical records. When applying for insurance in Thailand, having clear English-language medical records (or certified translations) demonstrating that your condition is well-controlled can significantly improve underwriting outcomes.
- Be specific about control. "Diabetes" is not the same as "Type 2 diabetes, HbA1c 6.8, no complications, controlled on metformin for 5 years." Specificity helps underwriters make more accurate (and often more favorable) decisions.
- Don't skip the specialist assessment. Some insurers offer to review with a CMO (Chief Medical Officer) for borderline cases — always request this if your initial application is declined.