What Is Burnout? The WHO Definition in Plain English

Burnout is a work-related syndrome, not a classified illness. The World Health Organization’s International Classification of Diseases, ICD-11, describes it as a syndrome conceptualized as resulting from chronic workplace stress that has not been successfully managed, with three dimensions: exhaustion, mental distance from or cynicism about one’s job, and a sense of ineffectiveness. The term applies to work only.¹

For anyone asking what is burnout in medical terms, where the WHO files it matters as much as the wording. The WHO classes burnout as an occupational phenomenon, not a medical condition: ICD-11, in effect since 2022, lists it among factors that bring people into contact with health services, not among illnesses.²³ What the entry does not supply is a test: there are no agreed diagnostic criteria, and researchers still argue over how far burnout overlaps with depression.⁴

The ICD-11 answer to “what is burnout”, phrase by phrase

The WHO’s ICD-11 entry for burnout, code QD85, has four parts: a syndrome, a stated origin in chronic workplace stress that has not been successfully managed, three dimensions, and a limit to working life. Each part narrows what counts as burnout.¹

“Syndrome” means a set of signs and symptoms that occur together.⁴ In our reading, the phrase “conceptualized as resulting from” describes how the WHO frames the concept; it does not say the cause has been proven. The cause is itself disputed: in a 2023 commentary in the WHO’s own Bulletin, the psychologists Renzo Bianchi and Irvin Sam Schonfeld wrote that the most comprehensive meta-analysis available finds job stressors to be weak predictors of burnout.⁴

The three dimensions come from research led by the psychologist Christina Maslach: Bianchi and Schonfeld note that the WHO definition closely corresponds to the one built into her questionnaire.⁴ Maslach and Michael Leiter describe burnout as a prolonged response to chronic interpersonal stressors on the job. In their 2016 review, each dimension covers a cluster of experiences, and two were renamed when the research moved beyond health and social care.⁵

The wording of the third dimension has shifted. The WHO’s May 2019 announcement called it reduced professional efficacy; the current ICD-11 release, dated 2026-01, speaks of a sense of ineffectiveness and lack of accomplishment instead.²¹ In our reading, both phrases name the same third dimension, so a summary that quotes the 2019 announcement is out of date in wording, not wrong about the definition.

1. Exhaustion: feelings of energy depletion or exhaustion
2. Mental distance: pulling away from the job, or feeling negative or cynical about it (Maslach’s questionnaire first called this depersonalization)
3. Ineffectiveness: a sense of being ineffective and accomplishing little at work (earlier called reduced personal accomplishment, then professional efficacy)
4. Work only: the WHO says the term refers to the occupational context, not to other areas of life

The entry ends with a boundary. Burnout refers specifically to the occupational context, and the WHO says the term should not be used to describe experiences in other areas of life.¹

Occupational phenomenon, not a medical condition: what that means

Calling burnout an occupational phenomenon means ICD-11 does not class it as an illness. The WHO placed it in the chapter on factors influencing health status or contact with health services, which covers reasons people see health services that are not illnesses or health conditions, in a group of problems associated with employment or unemployment.²¹

Myth

In 2019 the WHO made burnout an official medical diagnosis.

Fact

The WHO's 2019 announcement said burnout is not classified as a medical condition. ICD-11 files it under factors influencing health status or contact with health services, not among illnesses.

ICD-11 was adopted by the World Health Assembly in May 2019 and came into effect in 2022. The classification matters beyond wording, because health insurers use ICD coding to make reimbursement decisions.³

The QD85 entry also lists what burnout is not. Its exclusions are four groups of mental health conditions: mood disorders, anxiety or fear-related disorders, adjustment disorder, and disorders specifically associated with stress. Each has its own codes in ICD-11’s chapter on mental, behavioural or neurodevelopmental disorders.¹

Some countries went further than the WHO, and others held back. Maslach and Leiter report that Sweden began using work-related neurasthenia as a burnout diagnosis in 1997 and that North American health systems have been reluctant to recognize burnout as a clinical diagnosis, partly over concern about a flood of disability claims. Without an official diagnosis, they note, disability applications have cited depression, neurasthenia or chronic fatigue instead.⁵

Where the WHO wording comes from: Maslach’s questionnaire

The Maslach Burnout Inventory (MBI), first published in 1981, is the questionnaire behind the WHO’s wording and, according to Bianchi and Schonfeld, the most widely used measure of burnout.⁴ Maslach and Leiter, co-authors of its manual, describe it as the standard research tool, translated and validated in many languages.⁶⁵

The psychiatrist Herbert Freudenberger was the first to describe staff burnout, in 1974, and the social psychologist Christina Maslach began studying it independently in the same period.⁷ Maslach and Leiter write that the early research was exploratory and mostly qualitative, that the three dimensions emerged from it, and that the MBI was designed to measure them.⁵ Bianchi and Schonfeld read the history differently: in their account, Maslach’s first paper on burnout, in 1976, already described all three components before any systematic study had been done.⁴

1. 1974Herbert Freudenberger first describes staff burnout
2. 1976Christina Maslach's first paper on burnout
3. 1981The Maslach Burnout Inventory is released
4. May 2019The World Health Assembly adopts ICD-11, with burnout as an occupational phenomenon
5. 2022ICD-11 comes into effect

Bianchi and Schonfeld see that sequence as the core problem: in their reading, the questionnaire fixed burnout as a three-part syndrome caused by work stress, and ICD-11 later incorporated that definition.⁴

Not every questionnaire agrees on what burnout is. The Oldenburg Burnout Inventory measures two dimensions, exhaustion and disengagement, while the Shirom-Melamed Burnout Measure and the Copenhagen Burnout Inventory measure only kinds of exhaustion. Maslach and Leiter say the split reflects different ideas of burnout that persist to this day.⁵

Even its developers do not treat an MBI score as a diagnosis. In a 2017 book chapter quoted by Bianchi and colleagues, Maslach and Leiter wrote that no clinical research had established any particular score, or pattern of scores, as a meaningful indicator of serious problems in wellbeing or work performance.⁶ The inventory is copyrighted and paid to use, and its developers, Maslach and Leiter among them, defend the three-dimension model.⁴⁵

Is burnout just depression? Researchers disagree

Burnout and depression overlap, but how much is disputed. A 2019 meta-analysis of 67 papers with 84,169 participants found burnout and depression scores clearly related and concluded they are different constructs, while a 2021 analysis of 14 samples found the link between burnout’s core dimension, exhaustion, and depressive symptoms too strong for the two to count as clearly distinct.⁷⁸

The study

Mixed evidence

Is burnout depression? 67 papers pooled by Koutsimani and colleagues in 2019

Three researchers at the University of Macedonia in Thessaloniki, Greece, pooled studies that measured burnout and depression in the same people. The average correlation was 0.52 (95% confidence interval 0.49 to 0.55), on a scale where 1 would mean the two scores rise and fall in lockstep; for burnout and anxiety it was a little lower. In subgroup comparisons, correlations were lower in studies that used the MBI than in those using other burnout scales, and lower in studies rated good quality than in those rated fair. The authors concluded that burnout and depression are interconnected but not the same.⁷

The result shows the two scores travel together without being interchangeable. Its main caveat is design: 87 percent of the burnout and depression studies measured people only once, so the analysis cannot say which comes first, and the authors call for more long-term studies.⁷

Bianchi, Schonfeld and Eric Laurent read the evidence the other way. Their 2015 review of 92 studies judged the distinction between burnout and depression conceptually fragile and the evidence for burnout’s distinctiveness inconsistent, with the most recent studies casting doubt on it.⁹ In a 2021 study pooling 14 samples of people from several countries and occupations, 12,417 in all, Bianchi and colleagues found that exhaustion was more closely associated with depressive symptoms than with the other two burnout dimensions. The pooled exhaustion-depression correlation, corrected for measurement error, was 0.80, which they call problematically strong.⁸

Maslach and Leiter’s 2016 review answered an earlier study by Schonfeld and Bianchi that found the two indistinguishable at high levels: it measured both with scales dominated by fatigue items, they wrote, so a high correlation (0.77) was to be expected. They agree the two are linked: a Finnish long-term study they cite found that burnout and depression each predicted later changes in the other.⁵

The dispute has a practical side. Bianchi and Schonfeld warn that the burnout label may now mask depression, raising the risk that it goes undiagnosed and untreated.⁴ Whatever the right name, persistent low mood or loss of interest alongside work exhaustion is a reason to see a doctor, as the help section below sets out.

No agreed cutoff: why physician burnout rates range from 0 to 80.5 percent

Burnout rates vary so widely largely because there is no agreed definition or cutoff for counting a case. A 2018 systematic review in JAMA of 182 studies of practicing physicians in 45 countries found at least 142 definitions of burnout, and reported rates of overall burnout from 0 percent to 80.5 percent.¹⁰

National surveys usually count one dimension. According to the national public health institute RIVM, about one employee in five in the Netherlands reported work-related burnout complaints in 2025, up from 13.4 percent a decade earlier.¹¹ The survey, run by Statistics Netherlands (CBS) and the research organization TNO, drew answers from tens of thousands of employees that year.¹² It counts exhaustion only: people who, on average across five statements such as feeling emotionally drained by work, answered “a few times a month” or more often. That is a measure of how people feel, not of diagnosed burnout.¹¹ Maslach and Leiter warn that this narrows Dutch public discussion of burnout to exhaustion and risks missing what the other two dimensions capture.⁵

What the WHO definition leaves open

The ICD-11 entry describes burnout and lists exclusions, but gives no diagnostic criteria, cutoff score, minimum duration or treatment.¹ Bianchi and Schonfeld point out that after nearly 50 years of research no valid diagnosis for burnout exists.⁴

The entry frames burnout around a single source, chronic workplace stress.¹ Maslach and Leiter’s review describes a model of six areas of working life where a mismatch between person and job is linked to burnout: workload, control, reward, community, fairness and values. They caution that most burnout studies have been cross-sectional and many rely on self-report, so the assumed causes have rarely been tested directly.⁵

Because the WHO frames burnout as chronic workplace stress that has not been managed, it helps to understand how the stress response works in the body and why a response that stays switched on for weeks is the concern. Constraints matter too: not everyone can cut their workload or change jobs, and Maslach and Leiter note that most burnout interventions have targeted the individual, although the research points mainly to the work situation.⁵

Crisis help, a doctor soon, or a routine visit

Thoughts of suicide or self-harm need help straight away, whatever their cause. Low mood or loss of interest lasting most of the day for two weeks or more, or tiredness for weeks without a clear reason, calls for a doctor within days or weeks. The advice below comes from the US National Institute of Mental Health (NIMH) and the UK’s NHS; sorting it into three levels of urgency is our choice.

• Straight away: in the US, call or text the 988 Suicide and Crisis Lifeline, which is free, confidential and open 24/7, and call 911 in life-threatening situations, NIMH advises.¹³¹⁴ In the UK, the NHS says to call 999 or go to A&E if someone’s life is at risk or you do not feel you can keep yourself or someone else safe; for urgent help that is not an emergency, contact NHS 111 and select the mental health option, or ask for an urgent GP appointment. Samaritans offers free listening on 116 123 in the UK.¹⁵ Elsewhere, call your local emergency number.
• Within days or weeks: NIMH says a diagnosis of depression requires symptoms most of the day, nearly every day, for at least 2 weeks, one of them low mood or loss of interest or pleasure, and advises talking to a health care provider if signs persist.¹³ The NHS advises seeing a GP if you have felt tired for a few weeks and are not sure why, if tiredness affects daily life, or if it comes with weight loss or mood changes; you may need blood tests to check for anaemia, diabetes or an overactive thyroid.¹⁶
• When it keeps coming back: if exhaustion, distance from your job or a sense of ineffectiveness keeps returning but you are coping day to day, raise it with your doctor at a routine appointment. The NHS says a GP can advise on treatments and help you access mental health services, and that you may be able to refer yourself to some services.¹⁵ Outside the UK and US, read GP as your family doctor.

The bottom line

In the WHO’s words, burnout is a syndrome of exhaustion, distance from the job and a sense of ineffectiveness, tied to chronic workplace stress, limited to work and classed as an occupational phenomenon rather than an illness.¹² No test or cutoff is agreed, so read any burnout score or rate as a measure of how people feel, not a diagnosis.¹⁰ Because burnout and depression overlap, low mood or loss of interest lasting two weeks or more is a reason to see a doctor, whatever you call it.¹³