The best recent estimate puts the average IQ of doctors at about 113 — roughly the 80th percentile of the population — based on 178 medical practitioners in a large UK survey (Wolfram, 2023). Individual doctors vary widely, from below 100 to well above 130, and no medical school uses an IQ cut-off.
The best available data on doctors’ IQ
Reliable, recent IQ data for physicians are scarcer than the internet suggests. The most useful modern source is Tobias Wolfram’s 2023 study in Intelligence, which linked occupation codes with cognitive test results for about 29,000 adults in the UK Understanding Society panel. In the figures tabulated from that study, medical practitioners (N = 178) had an estimated mean of 112.7 on the IQ scale — among the highest of the occupations listed, though slightly below solicitors (114.2) and physical scientists (114.4).
An older data point comes from the Second World War: in Naomi Stewart’s (1947) analysis of US Army General Classification Test (AGCT) scores, medical students were among the top-scoring groups with a median of 127 — but on the AGCT’s own scale, which was not normed like a modern IQ test and is not directly comparable. It confirms the ranking, not the exact number.
Physician IQ range: how spread out are doctors?
The average hides a wide spread. If doctors’ scores are spread with the typical within-occupation standard deviation of about 13 points, the middle two-thirds of doctors would fall roughly between 100 and 126, and about one doctor in ten would score above 129. The table translates this into ranges:
| IQ range | Doctors (model) | General population |
|---|---|---|
| below 90 | ~4% | 25% |
| 90–99 | ~12% | 25% |
| 100–109 | ~25% | 25% |
| 110–119 | ~30% | 16% |
| 120–129 | ~20% | 7% |
| 130 or above | ~9% | 2% |
Model: normal distribution around the estimated mean with SD 13, the average within-occupation spread implied by Wolfram (2023), where roughly three-quarters of IQ variance lay within rather than between occupations. Real distributions can be skewed.
That overlap matters. It means a person with an IQ of 105 is not unusual among practising doctors, and a person with an IQ of 130 is not “meant” to be one. What distinguishes the profession is a long filter of grades, admissions tests, licensing exams and clinical training — and each of those filters measures far more than reasoning speed.
What IQ do you need to be a doctor?
There is no IQ requirement for medicine anywhere. Medical schools select on school or university grades, admissions tests such as the MCAT (US/Canada) or UCAT (UK/Australia/NZ), interviews and personal statements. These tests correlate with general ability but are not IQ tests; they also reward science knowledge, reading stamina and preparation. In practice, the academic demands of a medical degree make above-average reasoning ability helpful, and the data above are consistent with most doctors scoring in the 100–125 range.
Does a higher IQ make a better doctor?
Across all jobs, general mental ability predicts performance moderately: Schmidt and Hunter (1998) estimated a validity of about .51, and a 2022 re-analysis by Sackett and colleagues revised that to about .31. In medicine, clinical judgement, communication, conscientiousness, empathy and accumulated experience all add to what an IQ test can capture. A thoughtful doctor who listens carefully and checks their work can outperform a faster thinker who does not.
Specialties: surgeons vs. GPs vs. psychiatrists
You will find confident claims online that surgeons, radiologists or neurologists have higher IQs than family doctors. We could not find representative, peer-reviewed IQ data by medical specialty, so we do not publish any. Specialty choice is driven by interests, lifestyle, training competition and personality at least as much as by test scores.
How to read these numbers
Every number on this page comes with three caveats. First, the UK estimates are based on a short survey battery — word recall, number series, everyday numeric problems, serial subtraction and verbal fluency — rather than a full clinical IQ test, so they are less precise for individuals and tend to compress group differences. Second, they describe people working in an occupation at one time (2011–2013), not what the job requires. Third, they are averages: Hauser’s analysis of the Wisconsin Longitudinal Study found that the correlation between occupation and measured ability was only moderate (about .39–.44), and that the spread of ability was almost as wide in high-status occupations as in others.
Sources
- Wolfram, T. (2023). (Not just) intelligence stratifies the occupational hierarchy: Ranking 360 professions by IQ and non-cognitive traits. Intelligence, 98, 101755. Occupation figures as tabulated in J. Thompson, “Minds and professions” (2023).
- Stewart, N. (1947). AGCT scores of Army personnel grouped by occupation. Occupations, 26, 5–41.
- Engen (1952), thesis, University of Detroit, summarising Stewart (1947) AGCT medians (accountant 130; chemist 127; medical student 127; engineering students 125–128 on the AGCT scale).
- Hauser, R. M. (2002). Meritocracy, cognitive ability, and the sources of occupational success. CDE Working Paper 98-07, University of Wisconsin–Madison (Wisconsin Longitudinal Study).
- Schmidt, F. L., & Hunter, J. E. (1998). The validity and utility of selection methods in personnel psychology. Psychological Bulletin, 124(2), 262–274.
- Sackett, P. R., Zhang, C., Berry, C. M., & Lievens, F. (2022). Revisiting meta-analytic estimates of validity in personnel selection. Journal of Applied Psychology, 107(11), 2040–2068.
Frequently asked questions
What is the average IQ of doctors?
The best recent estimate, from Wolfram (2023) using UK Understanding Society data, is about 113 for medical practitioners (N = 178) on the standard IQ scale.
What IQ do you need to be a doctor?
None is officially required. Medical schools select on grades, admissions tests (MCAT, UCAT), interviews and other criteria. Most doctors probably score between about 100 and 125.
Do all doctors have an IQ above 120?
No. On a typical spread of about 13 points, fewer than a third of doctors would be expected to score above 120.
Do surgeons have higher IQs than other doctors?
There are no reliable, representative IQ data by medical specialty, so claims about specialty IQ rankings should be treated with caution.
Is IQ the best predictor of being a good doctor?
No. Cognitive ability predicts job performance only moderately (validity around .31 in the latest meta-analytic estimates); communication, conscientiousness and experience matter a great deal.