What an advance health care directive is

An advance health care directive is a legal document that does two things: it names someone to make medical decisions on your behalf if you cannot, and it records your own wishes about medical treatment so providers and your designated agent know what you want.

California uses the term “advance health care directive” to cover both functions in a single document. Some other states separate these into a “healthcare power of attorney” (naming the agent) and a “living will” (recording treatment preferences). In California, one document typically handles both.

The document is governed by California Probate Code 4600-4806, the Health Care Decisions Law.

Why it matters

Without an advance directive, medical providers have limited guidance about what you would want if you became unable to communicate. California law gives priority to a legally designated healthcare agent. If there is no agent, providers look to family members in a specified order: spouse or domestic partner, adult children, parents, siblings, and so on under Probate Code 4716.

That default hierarchy may or may not reflect your actual preferences. A sibling you do not want involved in your care may have the same legal authority as a close friend you would trust with everything. A partner you have lived with for years may have no authority at all without a formal document.

An advance directive lets you choose who speaks for you and gives them the legal authority to do it.

The healthcare agent

Your healthcare agent (sometimes called your healthcare proxy or healthcare power of attorney) is the person you authorize to make medical decisions when you cannot make them yourself. That includes decisions about:

  • Specific treatments to accept or decline
  • Surgery, hospitalization, and diagnostic procedures
  • Pain management and comfort care
  • Whether to continue, withhold, or withdraw life-sustaining treatment
  • Donation of organs or tissue after death
  • Where you receive care, including decisions about hospice or palliative care

The agent is bound to follow your instructions in the directive where they are clear, and to act in your best interest where the directive does not address a specific situation.

Choosing the right person matters. This is someone who needs to be able to speak clearly and firmly with medical providers under pressure, make difficult decisions you may have discussed but never fully resolved in writing, and carry out your wishes even if other family members disagree.

Name a backup agent (called a successor in the California form) in case your first choice is unavailable.

Your treatment preferences

The directive also records your own wishes about medical treatment. These can range from general statements about quality of life and personal values to specific instructions about particular treatments.

Common areas addressed in an advance directive:

Life-sustaining treatment. Do you want all possible measures taken to prolong life, or do you want treatment withheld or withdrawn if you are in a terminal condition, a permanent coma, or an advanced state of dementia with no reasonable expectation of recovery? These are not simple yes/no questions, and the answers often depend on the specific circumstances. The directive can address different scenarios with different instructions.

Artificial nutrition and hydration. Tube feeding and IV fluids are life-sustaining treatments. California law requires specific language in the directive if you want to allow their removal in end-of-life circumstances.

Pain management. Many people specify that they want adequate pain control even if it might have the secondary effect of shortening life. California law supports this preference, and stating it explicitly helps ensure providers follow it.

Organ donation. The directive can record your preferences about organ, tissue, and eye donation. You can also register on the California DMV organ donor registry separately.

Hospice and palliative care. You can specify preferences for comfort-focused care over curative treatment in end-of-life circumstances.

How California’s advance directive form works

California has a statutory advance directive form published by the California Medical Association. It is a multi-page document that walks through all of these decisions with checkboxes and space for written instructions. You do not have to use the statutory form, but using it ensures compliance with California law.

The document must be signed by you in the presence of two adult witnesses who are not your healthcare agent, not your heirs, and not employees of your healthcare provider. Alternatively, you can have it notarized instead of using witnesses.

An advance directive signed correctly in California must be honored by healthcare providers in California. If you spend significant time in another state, check whether your California directive is valid there. Many states have reciprocal recognition, but some have additional requirements.

A Physician Orders for Life-Sustaining Treatment (POLST) is a medical order, signed by both you and your physician, that translates your advance directive preferences into immediately actionable medical instructions. A POLST travels with you through the healthcare system and is followed by emergency responders and hospital staff as a standing order.

An advance directive is a legal document expressing your wishes. A POLST is a medical order carrying them out. For people with serious illness or advanced age, having both is the standard of care. For a relatively healthy person doing general estate planning, the advance directive is the primary document, and a POLST may not be appropriate yet.

The connection to your estate plan

An advance directive addresses health care decisions. A durable financial power of attorney addresses financial and legal decisions. A living trust and pour-over will address asset distribution. All three sets of documents work together.

For the full picture of how these documents fit together in a complete estate plan, see the estate planning service page. For specifics on the financial side of incapacity planning, see the power of attorney page.

Making sure providers have access to the document

An advance directive is only useful if providers can find it when they need it. Give copies to:

  • Your named healthcare agent and successor agent
  • Your primary care physician, to be included in your medical record
  • Any specialists or healthcare facilities you use regularly
  • A trusted family member or friend who would be contacted in an emergency
  • Your estate planning attorney’s file

California also has an Advance Health Care Directive Registry through the Secretary of State’s office, where you can file your directive for a small fee. Providers can access it in emergencies.

The California State Bar at calbar.ca.gov can connect you with a licensed estate planning attorney in San Diego County who can draft an advance directive, review it with you, and make sure it is executed correctly.

Trust Law SD connects San Diego residents with experienced local attorneys. Call (858) 925-5546 to get matched with an attorney who can prepare your advance health directive and the coordinating estate planning documents. See the advance health directives service page for more on what the document covers.

Can my family override my advance directive in California?

Your healthcare agent and medical providers are required to follow your advance directive. However, disputes can arise. If a family member challenges your directive or your agent’s decisions, the matter may go to court. The strongest protection is a clearly written directive with a trusted, capable agent who understands your wishes and is prepared to carry them out firmly if challenged.

Does an advance directive expire in California?

California advance directives do not automatically expire. However, if your health situation, values, or preferences change significantly, or if you want to change your named agent, you should update the document. Revoke the old one in writing and have a new one properly executed.

What if I become incapacitated before signing an advance directive?

Once you lack the mental capacity to understand and sign legal documents, you cannot execute an advance directive. At that point, California’s default hierarchy applies for healthcare decisions, which may or may not produce the outcome you would have wanted. This is why having the document in place while you are healthy is important, not just when you anticipate needing it.