C-SSRS Screener (Columbia Suicide Severity Rating Scale): What It Is and How It Works
The C-SSRS (Columbia Suicide Severity Rating Scale) is a suicide risk screening tool developed at Columbia University by Kelly Posner and colleagues and validated by Posner et al. in 2011. It is the most widely used and rigorously validated suicide risk assessment instrument in the world, used by clinicians, emergency departments, schools, the U.S. Department of Defense, the FDA, the CDC, and the World Health Organization. The C-SSRS Screener version is a brief 6-question version designed for non-clinical staff (such as teachers, first responders, or peers) to identify people who may need urgent mental-health attention. If you are in crisis right now, call or text 988 (U.S. Suicide & Crisis Lifeline). You are not alone, and immediate help is available 24/7. The C-SSRS is a clinician-administered screening protocol that supports clinical decision-making — it is not a self-diagnostic tool.
What is the C-SSRS?
The C-SSRS (Columbia Suicide Severity Rating Scale) is a clinician-administered suicide risk screening protocol developed at Columbia University by Dr. Kelly Posner and colleagues in 2008. The full C-SSRS is a structured instrument that measures both the severity and intensity of suicidal ideation and behavior. The C-SSRS Screener is a shorter version (typically 6 questions) used for triage in settings where non-mental-health professionals (such as teachers, primary care staff, or first responders) need to identify people who may require mental-health attention. The C-SSRS is endorsed by the U.S. Department of Defense, FDA, CDC, NIH, SAMHSA, WHO, and the National Action Alliance for Suicide Prevention. It is freely available for community use and has been translated into more than 100 languages.
What the C-SSRS measures
The C-SSRS measures two dimensions of suicide risk: ideation (thoughts about suicide) and behavior (any preparation for, attempt at, or completion of suicide). Ideation is rated on a 5-level severity scale, from passive ideation (such as a wish to be dead) through active ideation with specific plan and intent. Behavior covers actual attempts, interrupted attempts, aborted attempts, preparatory acts or behavior, and non-suicidal self-injurious behavior. The C-SSRS uses two different recall windows: ideation is typically rated for the past month (and the worst point in lifetime); behavior is rated for the lifetime (and the past 3 months). These dimensions and time frames matter because suicide risk is dynamic, and the pattern of ideation and behavior is more informative than any single point in time.
How the C-SSRS is administered
The C-SSRS is administered as a structured interview, typically by a clinician or trained staff member rather than as a self-report. The Screener version uses 6 yes/no questions that walk through ideation (questions 1-5) and behavior (question 6); the full C-SSRS uses a longer set of questions that add intensity measures (frequency, duration, controllability, deterrents, reasons for ideation). Recall windows differ by section: past month and lifetime worst for ideation; lifetime and past 3 months for behavior. The C-SSRS does NOT have a self-administration version intended for unsupervised use — by design, it produces a triage signal that a person needs further clinical assessment, which is why this Symptomatik page describes the protocol rather than offering a self-screen.
Who uses the C-SSRS
The C-SSRS is used by clinicians, emergency department staff, primary care providers, mental health specialists, hospitals, schools, military and veterans' services, first responders, suicide-prevention hotlines, and clinical researchers worldwide. The FDA requires the C-SSRS in clinical trials of drugs with potential suicide-related adverse events. The Joint Commission has named it among acceptable suicide risk screening tools for hospital accreditation. Schools and universities use it as part of student mental-health programs. The Veterans Administration includes it in clinical pathways for service members and veterans. The C-SSRS Screener is specifically designed for non-mental-health professionals — it produces a brief triage signal that the person needs further evaluation, not a clinical diagnosis.
C-SSRS is a screening tool, not a diagnosis or treatment plan
The C-SSRS Screener is a triage instrument — it identifies people who may need urgent mental-health attention, but it does not by itself diagnose anything or determine a treatment plan. A positive screen (a 'yes' answer to certain ideation or any behavior question) indicates that the person needs prompt evaluation by a qualified mental-health clinician. A negative screen does not mean a person is safe — suicide risk can change rapidly, and people sometimes do not disclose ideation. The U.S. Preventive Services Task Force notes that current evidence is insufficient to recommend universal suicide-risk screening in primary care for asymptomatic adults (Grade I — insufficient evidence), meaning the C-SSRS is best used as a targeted instrument when concern arises, not as a routine universal screen. If you or someone you know is in crisis, call or text 988 (U.S. Suicide & Crisis Lifeline), call 911, or go to your nearest emergency room.
Crisis resources — get help now
Reading about suicide can be difficult. If this page is hard for you right now, the resources below are open 24/7 and free to use.
If you or someone near you is in immediate danger, call 911 or go to the nearest emergency room. Emergency clinicians can provide rapid evaluation, safety, and a pathway to mental-health care.
For non-emergency crisis support — including suicidal thoughts, emotional distress, or worry about a loved one — the resources below are available around the clock.
| Resource | How to reach it | Who it serves |
|---|---|---|
| 988 Suicide & Crisis Lifeline | Call or text 988; chat at chat.988lifeline.org | Anyone in the U.S. in emotional distress or suicidal crisis; 24/7/365; free and confidential |
| Veterans Crisis Line | Dial 988 then press 1; text 838255; chat at veteranscrisisline.net/get-help-now/chat/ | Veterans, service members, National Guard and Reserve members, and their supporters — no VA enrollment required |
| Crisis Text Line | Text HOME to 741741 | Anyone needing text-based crisis support; free, confidential, 24/7 |
| 911 / Emergency Room | Call 911 or go to the nearest ER | Life-threatening situations, active self-harm, or medical emergencies |
The 988 Lifeline also offers dedicated lines and resources for several specific populations. These include Spanish speakers, Deaf and Hard of Hearing callers, LGBTQI+ individuals, American Indian / Alaska Native / Indigenous peoples, and Asian American / Native Hawaiian / Pacific Islander communities. Dedicated resources also exist for attempt and loss survivors, youth, and people with neurodivergence.
You are not alone. Suicidal thoughts can ease, and help is available.
How the C-SSRS works in clinical practice
The C-SSRS is built around a simple idea: ask plain-language questions about suicidal thoughts and behavior, then use the pattern of answers to guide what happens next. It is a clinical decision-support tool — the answers feed into decisions about “hospitalization, counseling, referrals, and other actions,” and Columbia provides triage documents that adapt the protocol to different settings.
Who administers the C-SSRS
The Screener version is designed to be used by people who are not mental-health specialists. Columbia describes the questions as requiring “no mental health training,” and the tool is deployed across healthcare facilities, schools, military installations, correctional systems, first-responder organizations, government agencies, and primary care. The Full C-SSRS — which adds richer detail on the intensity of suicidal thinking — is generally used by clinicians who can interpret the additional information.
Why a structured interview, not a self-test
The C-SSRS is given as a structured interview rather than as a self-administered questionnaire. The format lets the person asking the questions follow up, clarify, and judge whether the person seems to be at acute risk. Columbia emphasizes that the screener is efficient — it can be completed in minutes and “reduces unnecessary referrals” by giving non-specialists a structured way to triage. Because the protocol is interview-based, this Symptomatik page describes the C-SSRS rather than offering a self-screen. If you are worried about yourself or someone close to you, please call or text 988.
Where the C-SSRS fits in the VA, military, and beyond
The Department of Defense is among the institutions that have endorsed, recommended, or adopted the C-SSRS. For service members, veterans, National Guard and Reserve members, and their families, the Veterans Crisis Line is the dedicated 24/7 resource — dial 988 then press 1, text 838255, or chat at veteranscrisisline.net. You do not need to be enrolled in VA benefits or health care to connect.
The C-SSRS screener questions and what they assess
The C-SSRS Screener is a short series of yes/no questions. The exact wording and the clinical triage rules live in clinician-facing documents that Columbia distributes for free to communities, healthcare systems, and nonprofit research. Symptomatik does not reproduce the verbatim items here — the protocol is designed to be administered by a person, not self-completed, and the wording and follow-up logic matter.
At a conceptual level, the Screener walks through two areas: suicidal ideation (thoughts) and suicidal behavior (any preparation, interrupted or aborted attempt, or attempt).
How the ideation questions escalate
The ideation portion of the Screener moves from less specific to more specific thinking. Wikipedia’s summary of the published structure describes Question 1 as “wish to be dead,” Question 2 as “non-specific suicidal thoughts,” and Questions 3–5 as “specific suicidal thoughts and intent to act”. The scale as a whole rates ideation along a continuum that, in Wikipedia’s wording, ranges from “wish to be dead” to “active suicidal ideation with specific plan and intent and behaviors”.
This ordering matters because Columbia and the original Posner validation work both treat the severity of ideation as a central signal the tool is measuring. The Posner team found that the two highest ideation levels — “intent or intent with plan” — were associated with higher odds of attempting suicide during the studies’ follow-up periods.
How the behavior question works
The Screener separately asks about suicidal behavior — the scale addresses “Actual Attempt[s], Aborted Attempt[s], Interrupted Attempt[s] and Preparatory Behavior[s]”. Question 6 in the Screener captures suicidal behavior across the person’s lifetime and the past 3 months.
How clinicians use the answers
The pattern of yes/no answers feeds the triage decision — particularly any yes on the higher-severity ideation items or on the behavior question. Options include continuing to monitor, referring for outpatient mental-health care, referring urgently, or arranging immediate evaluation. The specific numeric cut-points used to assign “low / moderate / high” risk live in the Columbia Lighthouse triage documents and are intended for clinicians. Symptomatik does not list them here because they should be applied by trained users in context. Clinicians and authorized organizations can request the materials at cssrs.columbia.edu. If you are reading this because you are worried about your own thoughts, please call or text 988 now.
How accurate is the C-SSRS?
The C-SSRS is one of the most rigorously validated suicide-risk instruments in use. The foundational validation study by Posner and colleagues was published in the American Journal of Psychiatry in 2011.
What the Posner 2011 study examined
The Posner team analyzed the C-SSRS across three multisite studies with a combined sample of 673 participants. Study 1 was a treatment study of adolescents who had attempted suicide (N=124). Study 2 was a medication-efficacy trial with depressed adolescents (N=312). Study 3 enrolled adults presenting to an emergency department for psychiatric reasons (N=237).
What the study found
The authors reported several psychometric findings:
- Convergent and divergent validity with other multi-informant suicidal ideation and behavior scales.
- High sensitivity and specificity for suicidal-behavior classifications compared with another behavior scale and with an independent suicide evaluation board.
- Sensitivity to change over time on both the ideation and behavior subscales, which matters for tracking treatment response.
- Moderate to strong internal consistency on the intensity-of-ideation subscale.
- Predictive validity: among adolescents who had attempted suicide, the C-SSRS’s worst-point lifetime ideation rating predicted attempts during the study, while the comparator Scale for Suicide Ideation did not.
The authors concluded that the C-SSRS is “suitable for assessment of suicidal ideation and behavior in clinical and research settings”.
What this does (and does not) tell us about universal screening
The C-SSRS is widely endorsed, recommended, or adopted by the Department of Defense, CDC, FDA, NIH, SAMHSA, WHO, and the Action Alliance for Suicide Prevention. That endorsement applies to its use in clinical settings, research, and targeted populations — not to a recommendation that every adult should be screened for suicide risk during a routine primary-care visit.
The U.S. Preventive Services Task Force (USPSTF) has issued a Grade I statement on suicide-risk screening in adolescents, adults, and older adults in the general U.S. population without identified psychiatric disorders. A Grade I rating means “the current evidence is insufficient to assess the balance of benefits and harms of screening”. The USPSTF identified evidence gaps in three areas: screening accuracy in primary care, the benefits of early intervention through screening, and the harms of screening or subsequent treatment.
The practical implication is that the C-SSRS is best understood as a targeted assessment tool — used when a clinician or trained staff member has a concern — rather than as a routine universal test. If you are worried about yourself, you do not need to wait for a clinician’s screen; you can call or text 988 any time.
Limitations and considerations
The C-SSRS is well validated and widely used, but it has real limits anyone reading about it should know.
Limits of the instrument itself
- It is not a self-administered tool. The Screener is designed for trained staff or clinicians to ask, not for a person to complete alone.
- It does not replace clinical judgment. A positive screen is a triage signal — a reason to escalate to a clinician — not a diagnosis. A negative screen does not mean a person is safe.
- Cross-cultural reach is broad, validation is ongoing. The C-SSRS is available in more than 100 country-specific translations, which is part of why it is so widely used.
- Screener vs. Full C-SSRS. The Screener is a brief triage version for non-specialists. The Full C-SSRS adds an intensity-of-ideation subscale that captures more detail and was validated for internal consistency by Posner et al..
Limits in how screening is used
- Universal screening is not USPSTF-endorsed. The Grade I rating means the C-SSRS — and screening tools in general — are not recommended as a routine test for every adult in primary care; the role is targeted assessment when concern arises.
- A screen is the beginning, not the end. Like NIMH’s ASQ tool, the C-SSRS Screener sits in a wider workflow: brief screen → clinician evaluation → comprehensive assessment if indicated. The screen alone is not a treatment plan.
If you are worried about yourself or someone else right now, the screening conversation can wait. Call or text 988 for the Suicide & Crisis Lifeline, text HOME to 741741 for Crisis Text Line, or call 911 in an emergency. For veterans and service members, dial 988 then press 1 or text 838255.
What to do if someone you love seems at risk
If a friend, family member, partner, or colleague seems to be struggling, you can make a meaningful difference. The CDC frames suicide as “a serious public health problem that can have lasting effects on communities,” and NIMH notes that “when a person dies by suicide, the effects are felt by family, friends, and communities”.
Take concern seriously and connect them with help
NIMH and CDC describe a public-health approach to suicide prevention organized around risk and protective factors. CDC highlights tailored prevention efforts for specific populations, including veterans and tribal communities and American Indian populations who may face different patterns of risk.
The USPSTF’s evidence review identifies factors associated with elevated suicide risk:
- Mental health disorders
- Adverse childhood events
- Family history of suicide
- LGBTQ+ discrimination
- Access to lethal means
- A history of bullying
- Sleep disturbances
- Chronic medical conditions
- For older adults: social isolation and spousal bereavement
When you notice these patterns or simply feel worried, the most useful thing you can do is take the concern seriously and help the person connect with care. Crisis Text Line frames the goal of crisis intervention as helping a person “move from a hot moment to a cool calm” by drawing on their strengths and coping skills — a useful mental model for any supportive conversation.
Help them reach a professional or crisis line
- Call or text 988 together — the 988 Suicide & Crisis Lifeline is free, confidential, and available 24/7/365.
- Text HOME to 741741 — Crisis Text Line is a text-based option when a voice call isn’t possible or comfortable.
- For a veteran or service member, dial 988 then press 1, text 838255, or use the chat at veteranscrisisline.net.
- Call 911 or go to the nearest emergency room if the situation is life-threatening.
A note for clinicians using related screens
Many primary-care depression screens include a self-harm item that may trigger a C-SSRS follow-up. The PHQ-9 depression questionnaire asks about thoughts of self-harm in item 9. The Edinburgh Postnatal Depression Scale captures self-harm thoughts in perinatal patients in item 10. When either of those items is positive, the C-SSRS is often the next-step structured assessment. NIMH similarly recommends the ASQ as a brief screener whose positive responses lead to a “brief suicide safety assessment (BSSA) conducted by a trained clinician” — the same screen-then-evaluate hierarchy that the C-SSRS Screener sits within.
Look after yourself, too
Supporting someone in crisis is heavy. The 988 Lifeline serves loss and attempt survivors as well as people in distress themselves, and you can call 988 for support too.
Frequently asked questions
How is the C-SSRS scored?
The Screener uses yes/no answers across ideation and behavior questions. The pattern of answers — especially yes on the higher ideation levels or on the behavior question — determines the level of clinical concern and the recommended next step. Specific triage cut-points live in Columbia’s clinician-facing documents at cssrs.columbia.edu and are designed to be applied by trained users.
What is the age range for the C-SSRS?
The C-SSRS is described by Columbia as “universal” and “suitable for all ages,” with versions developed for pediatric through adult populations. The Posner 2011 validation work spanned both adolescents and adults across three studies. For specific age-appropriate versions, refer to the materials at cssrs.columbia.edu.
When is the C-SSRS used?
The C-SSRS is used in emergency departments, hospitals, primary care, mental-health clinics, schools, military and veterans’ services, first-responder organizations, correctional settings, and government agencies. If you are personally in crisis, you do not need a screening visit — call or text 988 any time.
How do I access the official C-SSRS form?
The C-SSRS is free for use by communities, healthcare systems, and nonprofit research. Materials are available through the Columbia Lighthouse Project at cssrs.columbia.edu, including the various versions and language translations. The protocol is designed to be administered by a person, not self-completed.
What is the difference between the Screener and the Full C-SSRS?
The Screener is a short yes/no triage version that walks through ideation and behavior in a few minutes and can be used by people without mental-health training. The Full C-SSRS adds the intensity-of-ideation subscale, which captures more detail about suicidal thinking and was validated for internal consistency in the Posner 2011 study. The Full version is generally used by clinicians who can interpret and act on the additional information.
Is the C-SSRS recommended for everyone in primary care?
No. The U.S. Preventive Services Task Force assigned a Grade I (insufficient evidence) to universal suicide-risk screening in the general adult, older-adult, and adolescent population without identified psychiatric disorders. The C-SSRS is best understood as a targeted assessment when concern arises — not as a routine universal screen. If you are worried about yourself or someone else, you do not need a clinician’s screen to reach for help; call or text 988.