Reviewed by ThaiLawOnline, a licensed Thai law firm practising in Thailand since 2006. Thai lawyer of record: Wichuda Atthamethakon, LL.M., Thai Bar Licence 3149/2556.
Last updated on September 5, 2026
Terminal illness (ระยะสุดท้ายของชีวิต, raya sutthai khong chiwit, also translated as the terminal stage of life or end stage) is a medical condition for which no cure is expected and death is foreseeable. In Thai law the phrase matters because it is the trigger for a living will: Section 12 of the National Health Act B.E. 2550 (2007) lets a person refuse health services that would only prolong death in the terminal stage of an illness, or end severe suffering from illness. A diagnosis of terminal illness by the treating physician is what turns a signed declaration into an instruction the hospital must respect.
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What Section 12 and the 2010 regulation say
Section 12 gives every person the right to make a written declaration, an advance directive or living will as it is usually called, refusing treatment intended only to prolong dying in the terminal stage of illness or to stop severe suffering. The Ministerial Regulation issued under the Act in 2010, in force from 20 May 2011, sets the procedure and defines the key terms: the terminal stage is the phase in which the illness cannot be cured and, in the attending doctor’s judgment, death is expected; life-prolonging treatment means intervention that extends life without curing.
The decision that a patient has reached that stage belongs to the doctor, not to the family and not to the document. Once it is made and a valid declaration is on file, the practitioner who withholds or withdraws the refused treatment commits no offence and is released from liability under the Act. The Supreme Administrative Court confirmed the regulation’s validity in 2015, so the framework is settled law rather than guidance.
Practical points for foreign patients
A foreigner living in Thailand should make the declaration while healthy and lucid, because capacity at signing is what a hospital will ask about later. The document should name the treatments refused in the terminal stage: cardiopulmonary resuscitation, mechanical ventilation, tube feeding, dialysis, further surgery. It should be in Thai or bilingual, dated, signed and witnessed by at least one adult with no interest in the estate, and a copy should be lodged with the treating hospital and the family doctor. Registration is optional through the National Health Commission Office’s electronic system.
The common mistake is relying on a directive signed abroad. Thai hospitals generally do not act on a foreign living will, and large private hospitals in Bangkok also want a second medical opinion confirming the terminal diagnosis before they stop treatment. A directive drafted to the Thai form, updated every few years, avoids both delays. Palliative care and pain relief are never among the treatments refused; the declaration turns off what prolongs dying, not what eases it.
Terminal illness, incapacity and euthanasia
Three situations are often run together. Terminal illness is the medical state in which a living will operates. Incapacity, the inability to make or communicate decisions, is what makes the document necessary in the first place: a conscious patient can simply refuse treatment in person. Euthanasia, the active ending of life, sits outside both; a request for a lethal dose in a terminal-illness declaration is void, and carrying it out is murder under Section 288 of the Criminal Code.
A living will also does nothing for the estate. It says who decides about treatment, or that treatment stops, and can appoint a surrogate decision maker under the National Health Commission’s 2020 notification, but property passes only under a last will and financial matters during incapacity need a separate power of attorney. Foreigners who prepare one usually prepare the other two at the same time.
Frequently asked questions
Who decides that a patient is terminally ill for a Thai living will?
The attending physician. The 2010 regulation under the National Health Act ties the terminal stage to the doctor’s assessment that the illness cannot be cured and death is expected. Many private hospitals ask for a second doctor’s confirmation before withdrawing treatment.
Can a terminally ill foreigner refuse treatment in Thailand?
Yes. Section 12 of the National Health Act applies to anyone treated in Thailand. A conscious patient can refuse in person; an unconscious one needs a living will made earlier in the Thai form, ideally bilingual and witnessed, and lodged with the hospital.
Is a living will the same as a last will in Thailand?
No. A living will covers medical treatment during terminal illness or incapacity and has no effect on property. A last will under the Civil and Commercial Code disposes of the estate after death. They are separate documents with different formal requirements.
See also: euthanasia, palliative care, incapacity, power of attorney, and the guides on the living will in Thailand and the 2010 living will regulation.
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