What is an Advance Health Care Directive?
- Kendra Hampton

- Mar 19
- 3 min read
An Advance Health Care Directive is the document that lets you name someone to make medical decisions for you if you lack capacity. It also lets you state your own wishes about treatment and care. You can also include information regarding organ donation, your primary physician, and your agent’s authority after death, including autopsy and disposition of remains.
What Does It Actually Do?
An Advance Health Care Directive answers two important questions: who can speak for you, and what you want them to say. If you name an agent, that person can make health care decisions for you when your physician determines you are unable to make your own decisions, unless your document says otherwise. California law also allows you to include specific instructions about your care, including life support, pain relief, and other treatment choices, so your wishes are not left to guesswork.
Why Your Written Wishes Matter
This is one of the most important parts of the document. California law requires an agent to follow your instructions and other known wishes. If your wishes are not known, the agent must decide based on your best interest and your personal values to the extent known. The same basic rule applies to a surrogate. That is why more detail is usually better. Clear instructions can help your agent feel more confident, reduce guilt, and make it easier for them to carry out your wishes rather than feeling like they are making the wrong choice.
You can include wishes about whether you would want life-prolonging treatment, pain relief, organ donation, and what should happen after death, including burial or cremation. The more guidance you leave, the more helpful the document can be for the people who may have to act for you.
Who Needs One?
Realistically, every adult should have one. This is not just for elderly people or people with serious medical issues. It matters any time you cannot communicate because of an accident, sudden illness, surgery complication, stroke, or later incapacity.
Does California Have a Default List of Decision Makers?
California does not have a simple automatic next of kin rule that always controls if you become incapacitated. The law does recognize a priority order for legally recognized decision-makers: first, a surrogate you personally designated to the provider during treatment; second, an agent named in an advance health care directive or health care power of attorney; and third, a conservator or guardian with authority to make health care decisions.
If none of those exists, a health care provider or facility may choose an appropriate surrogate for that situation. That person must be an adult who has shown special care and concern for you, knows your values and beliefs to the extent known, and is reasonably available and willing to serve. The provider may choose from a spouse or domestic partner, adult child, parent, adult sibling, adult grandchild, another adult relative, or a close personal friend.
Why That Still Is Not a Real Substitute for Planning
Even though California allows a provider to choose a surrogate in some situations, that is not the same as having an automatic default decision-maker you chose ahead of time. No one automatically steps in just because they are your closest relative. If there is no clear agent, no valid surrogate, disagreement among family members, or a need for longer-term authority, loved ones may have to go to court for a medical consent order or seek a conservatorship. California court guidance expressly says that if there is no advance directive, a family member may need to petition the court, and if help is needed for a longer time, a conservatorship may be required. That is why this document matters so much. Court proceedings are slower, more stressful, and more expensive than signing an Advance Health Care Directive now.
Does It Have To Be Signed a Certain Way?
Yes. In California, the directive must be signed and dated, and it must either be signed by two qualified witnesses or acknowledged before a notary public. If the person signing is in a skilled nursing facility, there are additional witness requirements.
What To Do Next
Review who you would trust to make medical decisions for you.
Write down more than the bare minimum. Specific guidance is often a gift to the person who may have to act for you.
Make sure your document is properly signed and give copies to your agent, doctor, and close family members.
About the Author
Kendra Hampton has nearly 20 years of legal experience. She manages her own estate planning practice and has helped hundreds of clients create and update their trust, will, and powers of attorney. Kendra is committed to educating clients on the importance of estate planning and crafting personalized planning strategies.

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