California Advance Health Care Directive

What an Advance Health Care Directive Actually Does

The moment your child turns 18 in California, your parental authority over healthcare no longer follows automatically. Providers may require the adult's authorization before sharing medical information with you or allowing you to act on their behalf — even if you drove your child to the ER and have been managing their care for two decades.

A California Advance Health Care Directive (AHCD) under Probate Code Section 4600 fixes this. It lets your adult child name you (or anyone they trust) as their healthcare agent, with authority to make medical decisions if they cannot communicate their own. It also lets them spell out treatment preferences — which interventions they want, which they refuse, and under what conditions.

Unlike a conservatorship, an AHCD requires no court filing, no investigator visits, and no attorney fees. Your child signs it, and the named agent's authority applies when your child is unable to make their own healthcare decisions, as the directive provides.

Who Can Sign One

California law presumes that every adult is competent to execute an AHCD. Your child does not need a doctor's certification, a psychological evaluation, or a judge's blessing. The relevant question is whether they understand the nature and consequences of choosing an agent to make healthcare decisions if they cannot make them; a diagnosis alone does not determine capacity.

This is a lower bar than many parents expect. A young adult with autism, Down syndrome, or an intellectual disability who can understand and communicate that they want Mom to act as their healthcare agent if they cannot decide may have the capacity to sign. The person does not need to understand every medical scenario that might arise. They need to grasp the core decision: "I am choosing someone I trust to help with healthcare decisions when I cannot make them."

Signing Requirements

California is strict about execution. An AHCD must be either:

• Notarized by a California notary public, or
• Signed in the presence of at least two disinterested adult witnesses

If your child lives in a skilled nursing facility, one of the two witnesses must be a qualified patient advocate or ombudsperson under California's skilled-nursing-facility requirements. This catches many families off guard — a standard two-witness signing is invalid inside a licensed SNF.

The directive cannot be signed before your child's 18th birthday. Many families draft the document months ahead, then execute it on the actual birthday.

What the Agent Can and Cannot Do

Once activated, the healthcare agent can consent to or refuse medical treatment, choose providers, access medical records, and authorize or withhold life-sustaining measures consistent with the directive's instructions.

There are hard limits. Under Probate Code Section 4652, a healthcare agent cannot authorize:

• Involuntary mental health commitment
• Convulsive therapy (electroconvulsive treatment)
• Psychosurgery
• Sterilization
• Abortion

These decisions remain with the individual or require a separate court order. The AHCD also does not cover financial decisions, educational rights, or housing — those require separate instruments like a Durable Power of Attorney or a Supported Decision-Making Agreement.

AHCD vs. Conservatorship

For many families of young adults with disabilities, an AHCD eliminates the primary reason they were considering a conservatorship in the first place: medical access.

A limited conservatorship in California takes three to six months, costs $3,000 to $10,000 in attorney fees alone, and requires a court investigator to visit your home. An AHCD costs nothing beyond a notary fee (typically $15 per signature in California) and can be signed the same day your child turns 18.

The tradeoff is scope. A conservatorship grants authority the court can enforce against third parties. An AHCD is a voluntary instrument — your child can revoke it at any time, and it covers only healthcare decisions. If your child cannot express preferences at all, even with support, they may lack the capacity to sign an AHCD, and a conservatorship may be the appropriate path. Our California Adult Guardianship & Alternatives Guide includes a capability assessment worksheet that helps you evaluate which tools fit your family's situation.

Common Mistakes to Avoid

Relying on a generic online form. National legal-template sites often produce AHCDs missing California-specific witnessing requirements. Always verify your form references Probate Code Section 4700 (the statutory form) and follows the applicable California execution requirements in Probate Code Section 4600 et seq.

Forgetting HIPAA separately. An AHCD grants decision-making authority, but some medical providers still ask for a standalone HIPAA authorization before releasing records. Signing both on the same day eliminates gaps.

Not distributing copies. An AHCD sitting in a desk drawer helps no one during an ER visit. Give certified copies to your child's primary care physician, specialists, the local hospital, and keep one in your phone (a clear photo of the signed, notarized document).

Assuming it covers everything. An AHCD handles healthcare. It does not let you manage your child's bank account, sign a lease, or sit in an IEP meeting. If you need authority in those domains, you will need additional instruments — a Durable Power of Attorney for finances, an Assignment of Educational Decision-Making Authority for school rights, or possibly a Supported Decision-Making Agreement covering multiple life areas.

Next Steps

Start drafting your AHCD before your child's 18th birthday so it is ready to sign on the day. If you want a complete California-specific planning framework that covers healthcare directives alongside SDM agreements, educational assignments, and financial powers of attorney — with the capability worksheets to determine which tools your family actually needs — the California Adult Guardianship & Alternatives Guide walks through each instrument step by step.

See more California guides →