Health insurance in Koh Samui.

The standard minimum is THB 400,000 inpatient (IPD) and THB 40,000 outpatient (OPD) cover per policy year, purchased from a Thai insurer on the official TGIA-approved list or an international insurer holding a Foreign Insurance Certificate. Some Thai embassies handling the initial application abroad instead require USD 100,000 per policy year (including COVID-19 cover) -- the two figures aren't interchangeable, so confirm which one your specific embassy or the Samui/Surat Thani Immigration office is asking for before buying a policy.

O-X carries the same THB 400,000 IPD / THB 40,000 OPD minimum as O-A for renewals at Thai immigration offices, but initial applications through a Thai embassy abroad commonly ask for the higher USD 100,000 figure instead. As with O-A, every applicant -- including a spouse or children on the same visa -- must maintain continuous cover for the full stay, not just at application.

The Board of Investment's LTR visa requires health insurance with inpatient coverage of at least USD 50,000 per year, with at least 10 months remaining on the policy at the time of application. If you'd rather not buy a policy, the BOI accepts three alternatives instead: a USD 100,000 bank deposit, a THB 3 million Thai bank deposit, or proof of Thai Social Security coverage.

There is no single government-wide health insurance mandate for the DTV. In practice, individual Thai embassies and consulates retain discretion over their own documentation checklists, and several do ask applicants for proof of cover -- commonly the same THB 400,000/40,000 figures used for O-A, or a USD 50,000 minimum. On an island where a serious case can mean a private hospital bill plus an evacuation charge, most residents carry cover regardless of what a given embassy required at application.

Local and Thailand-focused international insurers are the budget tier, often 30-50% cheaper than global plans for comparable cover. AXA Thailand's direct-billing network of 400+ hospitals nationwide includes Bangkok Hospital Samui, so 'budget' doesn't mean losing access to the island's flagship private hospital -- it usually just means a smaller worldwide footprint outside Thailand.

These add worldwide cover (useful if you split time off-island), higher annual and lifetime limits, and in some cases moratorium underwriting for pre-existing conditions. Global plans routinely bundle medical evacuation as standard, which is the single most relevant feature for an island resident carrying one of these policies rather than a mainland-city plan.

If a visa requires a policy from the official Thai General Insurance Association (TGIA) list specifically -- as O-A and O-X do -- confirm the insurer you're considering is on that list before buying. The Office of Insurance Commission (OIC) regulates and licenses insurers operating in Thailand, including on Samui.

Basic inpatient-only plans run roughly THB 20,000-40,000 a year. Inpatient plus basic outpatient cover moves to roughly THB 40,000-80,000. Comprehensive plans with higher limits and better outpatient cover run THB 80,000-200,000, and premium worldwide plans with evacuation built in can exceed THB 200,000 a year.

Roughly USD 70-250 a month in your 30s, USD 100-300 a month in your 40s, and USD 150-400 a month in your 50s -- indicative ranges, not fixed quotes; actual pricing depends on health history, deductible and exact plan, and whether evacuation is added as a rider.

Roughly USD 150-360 a month in your 30s and USD 200-480 a month in your 40s -- meaningfully higher than the Thailand-focused options above, reflecting the worldwide network, higher limits and standard-inclusion of evacuation cover.

The island's leading private hospital and part of the Bangkok Hospital (BDMS) group -- the widest specialty range, a full English-speaking international department and 24-hour emergency. Most Thailand-focused and international insurers (AXA Thailand, Cigna Global, April International) carry direct-billing agreements here, so confirm this specific hospital is in-network before buying rather than assuming every plan covers it equally.

A long-established private hospital favoured by residents and long-stayers for good-value everyday care, 24-hour emergency and an expat-oriented service desk near the airport on the north coast. Widely covered by mid-range Thailand-focused plans.

Centrally located on the main beach road with English-speaking staff and 24-hour emergency -- convenient for Chaweng and Lamai residents and typically included in the same insurer networks as Bangkok Hospital Samui.

The main government hospital: far cheaper than the private internationals but with longer waits and less English support. Most expat insurance exists precisely so residents aren't relying on the public system beyond routine or emergency stabilisation.

Samui's private hospitals are strong for routine and most emergency care, but complex specialist cases, major trauma or high-risk surgery are sometimes referred off the island -- by air ambulance or a hospital-arranged speedboat-plus-road transfer to Surat Thani, or air evacuation to Bangkok for the most serious cases. This is the one coverage gap a Bangkok-based policy comparison won't flag: confirm your plan explicitly covers inter-island/inter-provincial medical transport, not just treatment once you've arrived at a mainland hospital.

With direct billing, you show your insurance card at admission and the hospital bills your insurer directly -- no upfront cash, no reimbursement paperwork. AXA Thailand alone lists 400+ direct-billing hospitals nationwide including Bangkok Hospital Samui, and Cigna Global and April International both carry agreements with the BDMS network. Always confirm a plan's direct-billing status at your specific Samui hospital before buying, not just its headline coverage limit.

Without direct billing, you pay the full bill yourself at the hospital, then submit paperwork to your insurer and wait roughly two to four weeks for reimbursement of whatever's covered. Budget for the cash-flow gap if your plan works this way -- island private-hospital bills for anything beyond a routine visit are not small.

Insurers generally treat anything diagnosed or treated in the 2-5 years before your policy starts as pre-existing. Full, honest disclosure on the application matters: insurers can and do deny future claims entirely if a condition was undisclosed, so omitting something to lower a quote is a false economy.

Most standard plans exclude pre-existing conditions permanently. A number of plans instead impose a 12-24 month waiting period before covering a disclosed condition. A smaller group of premium international insurers -- Allianz Care is a commonly cited example -- offer moratorium or full-underwriting options that can bring a pre-existing condition into cover after a claims-free window, typically at a higher premium.

THB 400,000 inpatient and THB 40,000 outpatient cover per policy year, from an insurer on Thailand's official TGIA list or an international insurer with a Foreign Insurance Certificate -- though some embassies handling the initial application ask for USD 100,000 instead. Confirm which figure applies before buying a policy.

It isn't a visa requirement, but it's the single biggest practical gap in a mainland-style comparison. Samui's private hospitals handle routine and most emergency care well, but complex or high-risk cases are sometimes referred off-island by air ambulance or a hospital-arranged speedboat-plus-road transfer to Surat Thani, or flown to Bangkok for the most serious cases. Confirm your policy explicitly covers this inter-provincial transport, not just treatment once you arrive.

Bangkok Hospital Samui (part of the BDMS network) is the island's flagship and carries direct-billing agreements with most Thailand-focused and international insurers, including AXA Thailand, Cigna Global and April International. Thai International (Bandon) and Samui International are also widely covered by mid-range plans. Always confirm your specific insurer's agreement with your preferred hospital before buying.

Roughly THB 20,000-40,000 a year for basic inpatient-only cover, THB 40,000-80,000 for inpatient plus basic outpatient, and THB 80,000-200,000+ for comprehensive plans with evacuation. In practice that's about USD 70-250 a month in your 30s and USD 100-300 a month in your 40s for a Thailand-focused plan, rising for global tiers like Cigna Global that bundle evacuation as standard.

Direct billing means your insurer pays the hospital directly at admission -- you show your card and walk in, no upfront cash. Reimbursement means you pay the full bill yourself first, then claim it back from your insurer over roughly two to four weeks. Direct billing is significantly more convenient and available at Bangkok Hospital Samui through insurers like AXA Thailand.

Usually not straightforwardly. Most plans permanently exclude conditions diagnosed or treated in the 2-5 years before your policy starts, though some impose a 12-24 month waiting period instead. A handful of premium international insurers offer moratorium or full-underwriting options that can bring a pre-existing condition into cover later, typically at a higher premium. Always disclose fully -- non-disclosure is grounds for an insurer to deny future claims entirely.