California Advance Health Care Directive
Last updated: August 2026
An advance health care directive does two jobs in one document: it names the person who speaks for you about medical care if you cannot, and it records the treatment you would and would not want. Without one, those decisions fall to whoever is available and willing, and disagreement among family members can end up in front of a judge at the worst possible moment. Bay Legal, P.C. prepares advance health care directives as part of a California estate plan or on their own.
Definition: An advance health care directive is a California legal document naming a health care agent and recording your medical treatment wishes for a time when you cannot speak for yourself.
What does an advance health care directive cover?
California’s Health Care Decisions Law, at Probate Code section 4600 and following, provides for a single document combining what other states split into a living will and a medical power of attorney. It lets you:
- Appoint a health care agent, and alternates if your first choice cannot serve
- State your wishes about life-sustaining treatment, artificial nutrition and hydration, and pain relief
- Record preferences about organ and tissue donation
- Name a primary physician
- Limit your agent’s authority, or specify when it begins
Timing is worth understanding. Unless you say otherwise, your agent’s authority begins only when your primary physician determines you lack capacity to make your own decisions. Until that point you decide, and Probate Code section 4657 presumes you have capacity. You can also choose to have the agent’s authority take effect immediately, which some people prefer for practical reasons.
Probate Code section 4701 sets out a statutory form that satisfies the requirements. It is genuinely usable, and for a straightforward situation it may be all you need. Where the form falls short is where the situation is not straightforward — a blended family, a specific religious or ethical position on treatment, a diagnosis already in play, or an agent likely to face resistance from relatives.
Who can, and cannot, be your health care agent?
Almost any competent adult you trust. The exclusions are narrow and exist to prevent conflicts of interest between your care and someone’s financial or professional position:
- Your supervising health care provider, or an employee of the health care institution where you are receiving care, unless they are related to you or work for the same institution as you
- An operator or employee of a community care facility or residential care facility for the elderly where you are receiving care, on the same terms
Choose someone who will actually be reachable, who can hold a position under pressure from other relatives, and who knows what you would want. Name at least one alternate. The most common practical failure is not a bad agent but an unavailable one.
How is the directive executed in California?
Two routes, and either is sufficient. Under Probate Code section 4673, the directive must be signed and dated by you and either acknowledged before a notary public or signed by two qualified adult witnesses.
| Requirement | Notary route | Witness route |
|---|---|---|
| Who signs | You, before a California notary | You, before two adult witnesses who also sign |
| Witness restrictions | None required | Neither may be your health care provider, an employee of your provider or facility, or the agent you named |
| Related-party rule | None | At least one witness must not be related to you by blood, marriage, or adoption, and must not be entitled to any part of your estate |
| Skilled nursing facility | Additional requirement applies | Additional requirement applies |
The skilled nursing facility rule is the one most often missed. Under Probate Code section 4675, if you are a patient in a skilled nursing facility when you sign, the directive must additionally be witnessed by a patient advocate or ombudsman. This exists because residents of such facilities are the population most exposed to undue influence — and because it is exactly the moment when families rush to get a directive signed. A directive executed in a nursing home without that additional witness may be invalid.
What is POLST, and do you need one as well?
A POLST — Physician Orders for Life-Sustaining Treatment — is a medical order signed by a physician, governed by Probate Code section 4780 and following. An advance directive tells your agent and your doctors what you want. A POLST is an instruction to emergency and treating personnel, on a standard bright pink form, that they act on immediately.
| Advance health care directive | POLST | |
|---|---|---|
| Who it is for | Any competent adult | People with serious illness or advanced frailty |
| Who signs | You, plus notary or witnesses | You or your agent, and a physician or authorised practitioner |
| What it does | Names an agent and records your wishes | Gives immediately actionable medical orders |
| When it operates | When you lack capacity | Now, including in an emergency |
They work together rather than competing. A healthy adult needs a directive and does not need a POLST. Someone with a serious diagnosis usually needs both, and the POLST should be consistent with the directive.
Where should the directive be kept?
Somewhere it will be found in an emergency, which rules out a safe deposit box. Give copies to your agent and alternates, your primary physician for your medical record, and the hospital if a procedure is scheduled. Keep the original accessible at home. California also maintains an optional Advance Health Care Directive Registry through the Secretary of State, which stores the document and issues a wallet card — useful if you travel or if family are spread out.
Revocation is easy and deliberately so. Under Probate Code section 4727, a directive may be revoked at any time while you have capacity, and the appointment of an agent may be revoked by any communication to your supervising health care provider. Making a new directive supersedes an earlier one. Divorce revokes the appointment of a former spouse as agent unless the document says otherwise — which is worth knowing, because most people never revisit the document after a divorce.
Who prepares advance directives at Bay Legal?
Sivendra Ganesh Maraj leads estate planning and probate. Rachael Berg handles trust and estate matters alongside him. A directive is normally prepared as part of a full estate plan, together with a living trust, a pour-over will, and a durable power of attorney for finances, since those documents have to be consistent with one another.
Bay Legal, P.C. serves clients statewide from offices in Palo Alto and Los Angeles, including families across San Francisco and the wider Bay Area, with virtual consultations where that suits.
Frequently Asked Questions
What happens if I do not have an advance health care directive?
Decisions fall to family members without a clear legal ranking to resolve disagreement between them, or in a contested case to a court through a conservatorship or a petition for medical decision-making authority. That takes time you may not have, costs money, and puts a private decision in front of a judge who never met you.
Can I change or revoke my directive?
Yes, at any time while you have capacity. Under Probate Code section 4727 you may revoke it, and the appointment of an agent may be revoked by any communication to your supervising health care provider. Executing a new directive supersedes the old one. Retrieve and destroy old copies, since a superseded document in a physician’s file causes confusion.
Does my California directive work in other states?
Often, but not reliably. Many states honour an out-of-state directive, and some do so expressly. Because the requirements differ, someone who moves or who spends substantial time in another state should execute a directive valid there. Keeping both is generally better than replacing one with the other.
How often should I review it?
Every few years, and after any significant change — a new diagnosis, a marriage or divorce, the death or unavailability of your agent, or a shift in what you would want. A directive naming an agent who has moved away or died is functionally no directive at all.
Do I need a lawyer, or is the statutory form enough?
The Probate Code section 4701 form is valid and for a straightforward situation may be sufficient. Counsel earns its cost where the situation is not straightforward: a blended family, a specific religious or ethical position on treatment, an existing diagnosis, or an agent who is likely to face resistance from relatives.
What is the difference between a directive and a POLST?
A directive names your agent and records your wishes, and operates when you lack capacity. A POLST is a physician’s order, on a standard form, that emergency and treating personnel act on immediately. Healthy adults need a directive. People with serious illness usually need both, kept consistent with each other.
Related Questions
Is a living will the same thing in California?
California does not use a separate living will. The advance health care directive combines the instructions a living will would contain with the appointment of an agent, in one document under Probate Code section 4600 and following.
Can my agent override my written instructions?
Generally no. Your agent must act consistently with your known wishes and with any instructions in the directive. Where the document is silent, the agent decides in your best interest, considering your values.
What if my family disagrees with my agent?
The agent’s authority is legal, and providers should follow it. Sustained conflict can still end up in court, which is the outcome the document exists to prevent — and a reason to tell your family who you named and why, rather than leaving them to discover it.
Does a directive cover mental health treatment?
Only partly. Certain mental health treatments and placements carry separate statutory requirements and may not be authorised by a standard directive. If that is a live concern, it needs specific drafting.
Do I need a directive if I already have a trust?
Yes. A trust deals with property. A directive deals with your body and your medical care. They cover different things and a complete plan has both.
Talk to a California estate planning attorney
An advance health care directive is among the least expensive documents in an estate plan and the one most likely to be needed first. To prepare or update one with a Bay Legal attorney, call the office nearest you or email intake.
Bay Legal, P.C. — serving California statewide
Northern California office
667 Lytton Ave Ste 3, Palo Alto, CA 94301
Southern California office
3211 Cahuenga Blvd W Ste 212, Los Angeles, CA 90068
Intake: intake@baylegal.com
Fax: (650) 963-0041
Website: https://baylegal.com
This page is general information about California law and does not constitute legal advice or create an attorney-client relationship. It is not medical advice. For advice on your specific situation, contact a licensed California attorney and your physician.