| Independently reported | |
| Authoritative data | No authoritative data on the number and flow of medical tourists between nations[1] |
|---|---|
| Provenance of the headline figure | Traced in a commissioned review to a single consultancy report[1] |
| How method is disclosed | The exact ways in which figures in the most-cited reports were calculated remain unclear[2] |
| How figures become facts | Initial estimates were heavily cited and recycled until they became treated as facts[3] |
| All rows are independently reported: no official statistics on global medical travel market size exist to verify against. No value is given anywhere in this entry. | |
Medical tourism market size is the single most quoted figure in this field and the least traceable. This entry contains no market size figure. That is not an omission: the reason none appears is the subject of the entry.
What a market size figure would require
To state the size of a market in money, three things are needed: a definition of what counts as being in the market, a count of the transactions in it, and a price or value attached to each. In medical travel none of the three is available at global scale.
The definition is contested. A review commissioned by an international economic organisation found that published counts of medical tourists worldwide span orders of magnitude, and attributed the spread to method rather than to the world: in large part, it states, this disparity may be due to different definitions of medical tourism, noting that one firm’s markedly lower figures arose from deliberately excluding dental patients and expatriates.[1]
The count does not exist. The same review states that there is no authoritative data on the number and flow of medical tourists between nations, and that there is a lack of systematic data concerning health services trade, both overall and at a disaggregated level.[1] A 2010 peer-reviewed review states it more bluntly: there is no reliable hard data on patient numbers, flows, treatment types and success rates.[3]
The reason the count is hard is partly structural rather than a matter of effort. The commissioned review observes that many of the flows are confidential to protect privacy around treatments and choices, which makes the count further problematic, and that such health trade is also not seen as a priority for measurement by national stakeholders.[1] Nobody with the standing to require the data has wanted it badly enough.
Where the circulating figures come from
The most useful finding in this literature is about provenance. The commissioned review traces the most frequently cited industry revenue figure back to a single consultancy report, and notes that commonly reproduced figures draw on data collected and projections made by that one firm. It also states that such estimates rely on industry sources which may be biased and inaccurate, and that whilst there is an increasing amount written on the subject of medical tourism, such material is hardly ever evidence-based.[1]
A 2014 commissioned review of the same literature examined the two most-cited consultancy reports and found that the exact ways in which figures in these reports were calculated remain unclear. It records that most papers cited similar figures for patient flow, but often sources were not accessible or figures were based on media reports or on other academic papers, which in turn quoted inaccessible sources, and that reliable calculations of the actual volume of patient flow remain rare. Only eight papers in that review had generated or collected their own data on patient flows.[2]
The mechanism by which an unverified figure becomes an apparent fact is described in one sentence by the 2010 review: initial estimates and ideas about medical tourism were heavily cited and recycled until they became treated as facts. Of the 203 sources it reviewed, 6 were empirical studies reporting primary data and 107 came from popular media, and almost all were speculative in nature.[3]
That ratio, 6 empirical sources in 203, is the most concrete statement available about the state of the evidence, and it requires citing no market figure at all.
How to read a figure that is offered
A market size claim can be assessed without any specialist knowledge by asking four questions of it. What definition of medical travel does it use, and does it include dental patients, expatriates and people treated incidentally while abroad for another reason. What is the count of people or procedures it rests on, and who produced that count. What value is attached to each, and from what source. And what reference year does it describe, as distinct from the year it was published.
A figure that cannot answer all four is an assertion. On the evidence of the three reviews above, most cannot answer any.
Those reviews date from 2010, 2011 and 2014. Their findings concern the structure of the evidence base rather than any particular number, which is why they remain informative, but this entry does not assert that nothing has changed since. It asserts that a market size figure should be traceable, and that these reviews found traceability to be absent in the figures then in circulation.
See also
- Medical tourism statistics, what is actually measured and by whom
- Medical tourism market forecasts, the same figures projected forward
- Medical tourism revenue, the official statistics that do exist for money
- Medical tourism patient flows, the measured movement between countries
References
- Lunt N, Smith R, Exworthy M, Green ST, Horsfall D, Mannion R. Medical Tourism: Treatments, Markets and Health System Implications: A scoping review. 2011, commissioned by the OECD Directorate for Employment, Labour and Social Affairs. Verified against primary record: officially commissioned review opened and read. Retrieved 2 October 2026.
- King H, in Lunt N, Smith RD, Mannion R, et al. Systematic review: what do we know about medical tourism? In Implications for the NHS of inward and outward medical tourism, NIHR Journals Library, January 2014. Independently reported: publicly commissioned peer-reviewed research. Retrieved 2 October 2026.
- Johnston R, Crooks VA, Snyder J, Kingsbury P. What is known about the effects of medical tourism in destination and departure countries? A scoping review. International Journal for Equity in Health, 9:24, 2010. Independently reported: peer-reviewed scoping review. Retrieved 2 October 2026.
Sourcing note: the three reviews were opened and read on 2 October 2026. No market size figure appears in this entry, including none quoted in order to criticise it, because reproducing such a figure circulates it regardless of the surrounding text. The consultancy whose report the commissioned review identifies as the origin of the headline figure is not named here, because the naming belongs to that review rather than to this entry’s own sourcing. The reviews date from 2010, 2011 and 2014, and their findings are reported with those dates attached rather than as the current position.