A California power of attorney for health care is a written document that names a trusted adult to make medical decisions for you if you cannot make them yourself. It is part of California’s advance healthcare directive framework under Division 4.7 of the Probate Code, and once signed properly, it gives your chosen agent authority over treatment choices, provider selection, and even matters that arise after your death, such as organ donation and disposition of remains.
To be valid, the document needs three things: a date, your signature, and either notarization or the signatures of two qualified witnesses.1California Legislative Information. California Probate Code 4673 Everything else, from who you pick to when their authority starts, is either your choice or a default the law sets that you can override.
Who You Can Name as Your Agent
You can pick almost any adult. Most people choose a spouse, adult child, sibling, or close friend. Medical training is not required. What matters is that the person understands your values, can hold their ground in a tense conversation with doctors, and will actually follow your wishes when family members push back.
California blocks a narrow set of people because of conflicts of interest. Your agent cannot be your supervising healthcare provider, an employee of the healthcare facility where you receive care, or an operator or employee of a community care or residential care facility where you live. Those individuals may serve only if they are related to you by blood, marriage, or adoption, or if they are a coworker.2California Legislative Information. California Probate Code 4701
Name at least one alternate. Your first choice may be unavailable, unwilling, or unreachable at the moment you need them, and an alternate keeps you from defaulting into no agent at all.
How to Sign It So It’s Valid
You have two paths to a valid signature: get it notarized, or sign it in front of two qualified witnesses. If you physically cannot sign, another adult may sign for you in your presence and at your direction.
If you use witnesses, both must be adults, neither can be your named agent, and neither can be your healthcare provider or an employee of your provider, community care facility, or residential care facility for the elderly. At least one of the two witnesses must be someone not related to you by blood, marriage, or adoption and not entitled to any part of your estate.3California Legislative Information. California Probate Code 4674
If You Live in a Skilled Nursing Facility
Signing while a patient in a skilled nursing facility triggers an extra safeguard. A patient advocate or ombudsman designated by the Department of Aging must sign as a witness, either as one of your two witnesses or on top of notarization. The rule exists because the custodial nature of skilled nursing care can make it harder for a patient to act freely, and an independent advocate confirms the document reflects your actual wishes.
Electronic Directives
Electronic advance directives are allowed but held to a stricter standard. An electronic version must be acknowledged before a notary public. Witnesses alone will not do. Any digital signature has to be unique to you, verifiable, and linked to the document in a way that would invalidate the signature if the document is later changed.1California Legislative Information. California Probate Code 4673
When Your Agent’s Authority Kicks In
By default, your agent has no authority until a determination is made that you lack the capacity to make your own medical decisions, and their authority stops again if you regain capacity.4California Legislative Information. California Probate Code PROB 4682 This is called a springing power because it springs into effect only when needed.
You can override the default. If you want your agent to have authority immediately, even while you can still speak for yourself, say so in the document. People managing a progressive illness sometimes prefer this so their agent can coordinate with doctors from the beginning rather than waiting on a formal incapacity finding.
Under the springing default, providers usually want a physician’s written statement confirming incapacity before they honor your agent’s authority. You can shorten the wait by writing into the document exactly how incapacity should be determined, such as requiring one or two independent physicians to sign off.
A related point on capacity: California presumes every adult has the capacity to sign a directive, and anyone challenging it later bears the burden of proving otherwise.5California Legislative Information. California Probate Code PROB 4657 That presumption is strongest when you sign well before any diagnosis raises the question. Waiting until concerns arise makes the document easier to challenge.
What Your Agent Can and Cannot Do
Unless you write in restrictions, your agent essentially steps into your shoes. They can consent to or refuse any treatment, pick or dismiss providers, approve diagnostic tests and surgery, and direct whether to withhold or withdraw life-sustaining treatment, including artificial nutrition and hydration.6California Legislative Information. California Probate Code PROB 4683
The authority reaches past your death. Under the same statute, your agent can authorize organ and tissue donation under the Uniform Anatomical Gift Act, consent to an autopsy, and direct the disposition of your remains. If you have specific wishes on any of those, put them in writing so your agent is not guessing.
How Your Agent Is Supposed to Decide
Your agent cannot substitute their own preferences for yours. California law requires the agent to follow your written instructions first, then your known wishes, and only if neither provides guidance may the agent act on their assessment of your best interest, taking your personal values into account.7California Legislative Information. California Probate Code 4684 The more specific your written instructions, the less room for family conflict.
Hard Limits Built Into the Law
Even with the broadest grant, your agent cannot commit you to a mental health treatment facility or consent on your behalf to convulsive treatment, psychosurgery, sterilization, or abortion.2California Legislative Information. California Probate Code 4701 These are statutory limits and the document cannot expand them.
You can also add your own restrictions. Prohibit withdrawal of specific treatments, require a second opinion before major surgery, or require that a named family member be consulted. Anything you write in binds your agent.
Access to Your Medical Records
An agent under California law qualifies as a “personal representative” under the federal HIPAA Privacy Rule. Providers must treat your agent as they would treat you when it comes to your protected health information, including reviewing records and directing copies to a third party.8U.S. Department of Health and Human Services. Individuals’ Right Under HIPAA to Access Their Health Information The access is limited to information relevant to the decisions the agent is authorized to make.9eCFR. 45 CFR 164.502 – Uses and Disclosures of Protected Health Information
No special HIPAA language is required in the directive. A properly executed California power of attorney for health care is enough on its own. Some people add a HIPAA authorization paragraph anyway to reduce friction with cautious records departments; it is not legally necessary, but it can speed things up.
Changing or Revoking the Document
You can revoke or update your directive at any time, as long as you have capacity. California treats revoking your agent differently from revoking other instructions. To revoke your agent designation, you must either sign a written statement or personally inform your supervising healthcare provider. To revoke other instructions in the directive, any method that communicates your intent will do.10California Legislative Information. California Probate Code PROB 4695
The cleanest way to make changes is to sign an entirely new directive with the same formalities as the original. Handwritten edits invite disputes. After signing a new one, tell your former agent, your current providers, and anyone else holding a copy of the old document.
Divorce Revokes a Spouse Agent Automatically
If you named your spouse as agent and later divorce or annul the marriage, California automatically revokes the designation. Nothing needs to be filed. If you and your former spouse later remarry, the designation is automatically revived.11California Legislative Information. California Probate Code PROB 4697 Anyone going through a divorce should name a new agent quickly, because the automatic revocation leaves you with no designated decision-maker in the meantime.
Using California’s Free Statutory Form
California publishes a free statutory form in Probate Code Section 4701 that most people can complete without a lawyer. It has separate parts for naming an agent and alternates, writing out treatment instructions, addressing organ donation, and designating a primary physician. You can use all of it, part of it, or a completely different form, provided the signing and witnessing rules are met.2California Legislative Information. California Probate Code 4701
The statutory form is a solid starting point for most situations. Where it struggles is with complex medical situations, blended families, or specific wishes that do not fit its checkboxes. In those cases, an attorney-drafted directive can head off ambiguity that leads to fights later.
What Happens If You Skip It
Without a signed directive, California gives you thin alternatives. You can verbally designate a surrogate by telling your supervising healthcare provider, but that designation lasts only for the course of treatment, the length of your hospital stay, or 60 days, whichever is shortest.12California Legislative Information. California Probate Code 4711 It is a stopgap.
If no surrogate is designated and no directive exists, family or the hospital may need to seek a court-appointed conservatorship. That is expensive and slow, commonly running several thousand dollars in attorney fees plus court costs, a court-appointed attorney for the proposed conservatee, and possible bond premiums. It can take weeks or months, during which medical decisions get delayed or made by default, and the person under conservatorship can lose the right to decide where they live, what treatment they receive, and how their money is managed.
A signed directive avoids all of that. Using the statutory form costs nothing and takes under an hour.
How This Differs From a POLST
A POLST (Physician Orders for Life-Sustaining Treatment) is often confused with an advance directive but does something different. A POLST is a medical order signed by a physician, not a planning document signed by a patient. It translates preferences into specific orders that emergency responders and hospital staff follow immediately, covering things like CPR, intubation, and comfort-focused care. POLST forms are intended for people with serious illness or who are frail and near end of life. A healthy adult does not need one. The two documents work together when both apply: the directive names your decision-maker and records your general preferences, while a POLST gives medical personnel concrete orders to act on in a crisis.
If You Spend Time in Another State
A California directive is usually honored elsewhere. Most states have statutes recognizing out-of-state advance directives if the document was valid where signed or meets the requirements of the state providing treatment, and outright refusals are rare in practice. Interpretation is the harder issue, because terminology and rules vary. If you spend significant time in a second state, having a local attorney review your California directive, or preparing a second one that complies with that state’s rules, is a reasonable precaution.