In California, a person qualifies for a 5150 hold when a mental health disorder is causing them to be a danger to themselves, a danger to others, or gravely disabled, and a legally authorized person has probable cause to believe one of those three conditions is present. The authority comes from Section 5150 of the Welfare and Institutions Code, which permits involuntary detention for up to 72 hours of psychiatric evaluation and crisis intervention.1California Legislative Information. California Welfare and Institutions Code 5150 Having a mental health diagnosis is not enough on its own. The condition has to be producing one of those three specific outcomes at the time the hold is initiated.
The Three Qualifying Criteria
Only one of the three has to apply.1California Legislative Information. California Welfare and Institutions Code 5150
Danger to Self
The person is behaving or making statements that indicate a serious risk of self-harm. Suicide attempts, active suicidal threats, and actions that place the person in immediate physical jeopardy all fit here.
Danger to Others
The person has threatened, attempted, or demonstrated a likelihood of inflicting physical harm on another person. A single credible threat combined with the capacity to carry it out can be enough; a pattern is not required.
Gravely Disabled
The person’s condition has left them unable to meet their own basic needs. This category used to be narrow, and it recently got wider.
What “Gravely Disabled” Now Covers
Senate Bill 43 reshaped this criterion. Before SB 43, “gravely disabled” meant an inability to provide for food, clothing, or shelter. The updated definition still covers those, and adds an inability to provide for personal safety or necessary medical care.2California Legislative Information. California Welfare and Institutions Code 5008
SB 43 also expanded the qualifying conditions. A person can now be considered gravely disabled as a result of a severe substance use disorder, or a co-occurring mental health disorder and severe substance use disorder, rather than a mental health disorder alone.3California Department of Health Care Services. Senate Bill 43 Changes to Gravely Disabled FAQs Counties were allowed to defer implementation until January 1, 2026, so the expanded definition applies statewide now.2California Legislative Information. California Welfare and Institutions Code 5008
In practical terms, someone refusing life-sustaining medical treatment because of a severe mental health or substance use condition, or someone who repeatedly puts themselves in dangerous situations they cannot recognize as dangerous, may now qualify under the gravely disabled standard where they would not have before. One limit: intellectual disability alone does not qualify a person as gravely disabled under this statute.
Imminent Harm Is Not Required
This is where expectations and the law diverge most often. California law specifically says the probable cause determination “shall not be limited to consideration of the danger of imminent harm.”1California Legislative Information. California Welfare and Institutions Code 5150 A person does not need to be mid-attempt for a hold to be legally justified. The person’s history and the overall trajectory of their mental health disorder can factor into the decision. A pattern of deteriorating behavior paired with a current crisis can be enough.
The flip side also matters. A person who is upset, odd, intoxicated, or simply refusing treatment does not automatically qualify. There has to be a mental health disorder (or, now, a severe substance use disorder) and one of the three outcomes it is causing. The hold is for assessment and crisis intervention, not for behavior someone else finds alarming or inconvenient.
Who Can Decide a Person Qualifies
The determination that someone meets the criteria is not something a family member, friend, teacher, or employer can make. California law limits that authority to:1California Legislative Information. California Welfare and Institutions Code 5150
- Peace officers, who initiate most 5150 holds in practice.
- The professional person in charge of a county-designated evaluation and treatment facility.
- Attending staff at a county-designated facility, as defined by state regulation.
- County-designated members of a mobile crisis team.
- Other mental health professionals specifically designated by the county.
If you believe someone you know meets the criteria, the route is to call 911 or a local crisis line so an authorized person can make the determination. That person needs probable cause based on direct observation or credible witness accounts. A psychiatric facility cannot refuse a person brought in by a peace officer because no bed is available, and clinical staff cannot block officers from entering the facility with the person being assessed.4California Legislative Information. California Welfare and Institutions Code 5150.1
Minors: Same Criteria, One Added Condition
California applies the same three criteria to minors through a parallel statute, Section 5585.50 of the Welfare and Institutions Code. A minor can be detained for up to 72 hours when a mental health disorder is causing danger to self, danger to others, or grave disability.5California Legislative Information. California Welfare and Institutions Code 5585.50
What differs is the voluntary-treatment check. A minor can only be placed on an involuntary hold if authorization for voluntary treatment is not available, which usually means a parent or legal guardian cannot be reached or has refused to consent. The facility must try to notify the parent or guardian as soon as possible after detention. And if the probable cause rested on a third party’s statement rather than the officer’s or clinician’s own observation, that person can be held civilly liable for knowingly providing false information.5California Legislative Information. California Welfare and Institutions Code 5585.50
What Qualifying Triggers Beyond the Hold Itself
Meeting the criteria does more than start the 72-hour clock. If a person is taken into custody under Section 5150 because they were a danger to themselves or others, assessed, and then admitted to a designated facility for that reason, California prohibits them from owning, possessing, or purchasing any firearm, deadly weapon, or ammunition for five years after release. More than one qualifying hold inside a single year turns that five-year ban into a lifetime prohibition. A person can petition the superior court in their county of residence to challenge the prohibition, and the court must schedule the hearing within 60 days; the state then has to prove by a preponderance of the evidence that the person would not use firearms safely and lawfully.6California Legislative Information. California Welfare and Institutions Code 8103
One boundary worth naming: a 5150 hold is not a criminal arrest and does not create a criminal record. It will not appear on a standard employment background check. The firearm reporting to the Department of Justice is a separate, specific disclosure tied to the gun-purchase background check system, not a general release of your psychiatric history.
The Short Version
Someone qualifies for a 5150 hold when all of the following line up at the moment of detention: a mental health disorder (or, under the SB 43 expansion, a severe substance use disorder or both) is present; that condition is producing danger to self, danger to others, or grave disability as the statute defines it; and a peace officer or county-authorized mental health professional has probable cause to believe so. Imminent harm is not required, but a diagnosis without one of the three outcomes is not enough. Everything else about the hold, from how long it lasts to who pays for it, follows from that initial qualifying determination.