Who can consent to medical treatment for a child in Malaysia, and what if consent was not obtained?

Parents usually sign consent forms without a second thought. Questions arise when parents are separated and disagree, when a grandparent or teacher brings a child to the clinic, when a teenager wants treatment without telling their parents, or when a procedure went wrong and the parents say they were never properly told about the risks.

Who is a minor?

Under the Age of Majority Act 1971, the age of majority is 18. The Malaysian Medical Council's (MMC) guidance on consent defines a minor as someone who has not reached the age of majority.

Who can give consent for a child?

The MMC's Consent for Treatment of Patients by Registered Medical Practitioners (Version 3/2025) and its accompanying FAQs say, in summary:

• Either parent's consent is usually sufficient, because each parent has parental responsibility for a child under 18, and this is not affected by the parents separating.
• Exceptions include a court order to the contrary or an apparent dispute between the parents. The FAQs suggest counselling the parents, an ethics consult, or legal advice if there is doubt.
• An adult who brings a child but is not a parent: in a non-emergency, the doctor should find out the adult's relationship and authority. A blanket form signed by parents allowing any third party to authorise treatment is not considered valid consent.

The Guardianship of Infants Act 1961 and any custody or guardianship order are also relevant. See child custody.

What about mature teenagers?

The MMC guidance says younger children are generally not competent to consent, but whether a minor can give valid consent depends on whether they have sufficient maturity and intelligence to understand the nature and implications of the treatment. Doctors decide this case by case, and should respect the decisions of mature minors as far as possible while being mindful of laws that require parental consent.

What about emergencies?

The guidance recognises a medical emergency as an exception to obtaining consent first. It should be used sparingly and limited to what is needed for the immediate necessity.

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What does "informed" consent require?

Signing a form is not the whole story. In Foo Fio Na v Dr Soo Fook Mun [2007] 1 MLJ 593, the Federal Court held that the duty to advise of risks is not determined by the Bolam test alone. Parents deciding for a child should be told about material risks and reasonable alternatives. See informed consent.

What if my child was treated without proper consent?

1. Request the records, including the signed consent form and notes of discussions.
2. Write down who was present, what was explained and who signed.
3. If you are separated, keep the custody or guardianship order and any correspondence showing a dispute was known.
4. Get an independent medical opinion if your child was harmed.

A claim usually depends on whether proper consent and information would have changed the decision, and whether the child was harmed.

Common mistakes

• Assuming the signature on the form ends the matter.
• Not telling the hospital about a court order on custody or medical decisions.
• Using a child's medical treatment as a battleground between separated parents.

When to speak to a lawyer

If your child was harmed after treatment you did not properly consent to, or separated parents disagree about a child's treatment. You can contact us; every case depends on its facts.

Frequently asked questions

My ex-spouse consented to surgery I objected to. Is that valid?

Usually either parent's consent is sufficient, but a known dispute or a court order may change that. Get advice quickly if surgery is planned.

Can a 16-year-old get treatment without parents knowing?

It depends on the treatment, the teenager's maturity, and laws requiring parental consent. The doctor assesses this case by case.

Can grandparents consent?

Only if they have authority, for example as guardian. A general letter allowing anyone to consent is not valid consent under MMC guidance.

Does a signed form mean we were properly informed?

Not necessarily. The discussion of risks matters, not just the signature.

Can parents refuse treatment for a child?

Generally parents decide, but where refusal endangers a child, doctors may seek legal advice and the courts can intervene.

Sources & fact check

Legal points in this article were checked against the primary sources below. The law can change; this is general information, not legal advice.

1. Age of Majority Act 1971 (Act 21), AGC Laws of Malaysia
2. Malaysian Medical Council, Consent for Treatment of Patients by Registered Medical Practitioners (Version 3/2025)
3. Malaysian Medical Council, FAQs on Consent for Treatment of Patients (Version 1/2025)
4. Guardianship of Infants Act 1961 (Act 351), AGC Laws of Malaysia
5. Foo Fio Na v Dr Soo Fook Mun & Anor [2007] 1 MLJ 593 (Federal Court) (reported judgment)

Fact-checked on 17 Oct 2026