American Health & Medical Research Association
Hands-on therapies

One word, two professions, and the treatment most DOs skip

An American DO is a licensed physician and a British osteopath is not, and inside the US profession the manipulation that gives it its name is a minority activity.

By the Health Research USA editorial team

Published Last updated October 2026

Written from the sources listed below; links checked October 2026. It touches on medicines, doses or health conditions and has not yet been reviewed by a licensed clinician, so use it to prepare for a conversation with yours. How we research and review

Sources20, listed below Reading time16 minutes
On this page
  1. In the United States, a DO Is a Physician
  2. In Most of the World, an Osteopath Is Not a Physician
  3. The Treatment Most DOs Barely Use
  4. What the Treatment Is, and What Three Reviews Say
  5. The Cranial Question
  6. Harm, and What Anyone Looked For
  7. Questions That Get You a Useful Answer

In Columbus, Ohio, you make an appointment with an osteopath and you get a physician. She went to medical school for four years, sat a three-part national licensing examination, and trained in a residency alongside graduates of conventional medical schools. The federation of state medical regulators counts her inside the same population of actively licensed physicians as every MD in the country.

In Manchester, England, you make an appointment with an osteopath and you get something else entirely: a manual therapist on a statutory register, holding a title that is protected by criminal law, regulated under an Act of Parliament written for that profession alone rather than under the law that governs doctors.

Same word. Two professions. Most of what goes wrong in writing about this subject follows from collapsing them, and it goes wrong in both directions. Call American osteopathic physicians alternative practitioners and you have libelled more than 167,000 licensed doctors. Tell a British reader their osteopath is a doctor and you have misled them about what their practitioner can safely handle.

There is a third thing worth knowing before any of that, and it is the fact most likely to change what you expect from an appointment. The hands-on manipulation that gives the profession its name is something most American osteopathic physicians almost never do.

In the united states, a DO is a physician

The architecture is checkable, so check it at the recognizing body rather than taking anyone’s word.

The US Department of Education publishes a list of the programmatic accrediting agencies it recognizes. On it sits the American Osteopathic Association’s Commission on Osteopathic College Accreditation, with a recognized scope covering the accreditation and preaccreditation of freestanding institutions of osteopathic medicine, and of osteopathic medical programs leading to the degree of Doctor of Osteopathy or Doctor of Osteopathic Medicine. That is the federal government confirming the accreditor’s authority, not the accreditor confirming its own.

Graduates sit COMLEX-USA, which the Association of American Colleges of Osteopathic Medicine describes as three standardized examinations of medical knowledge taken in sequence, administered by the National Board of Osteopathic Medical Examiners. The levels run from the preclinical years through residency. The load-bearing sentence on that page is short, and it says that every one of the 50 states accepts COMLEX-USA for licensure. Osteopathic students may also sit the USMLE, the examination series taken by graduates of conventional medical schools.

For scale, the Federation of State Medical Boards publishes a census of licensed physicians drawn directly from state medical and osteopathic boards. Its 2024 census, published in August 2025, counted 1,082,187 physicians holding active, full, unrestricted licenses in the United States and the District of Columbia at the end of 2024. Eighty-nine percent hold an MD. Eleven percent hold a DO. The number of licensed DOs has grown 110 percent since 2010.

The profession’s own count, from the American Osteopathic Association’s 2025 Osteopathic Medical Profession Report as reported in the association’s magazine on 30 October 2025, puts the figure at more than 167,000 DOs, with nearly 40,000 students and a combined total of 207,158. It gives the share of US physicians as roughly 11 percent.

Treat the head count as what it is, a trade body’s census of its own profession, because no better count exists. The share is the part that corroborates. An advocacy organization and an independent regulators’ federation, counting different populations by different methods, land on the same 11 percent.

One structural detail is worth carrying. Some states license MDs and DOs through a single medical board, while others maintain a separate osteopathic board, which is why the federation describes its data as coming from state medical and osteopathic boards. If you ever need to look up a DO’s license, that is the fork in the road.

In most of the world, an osteopath is not a physician

The United Kingdom offers the cleanest contrast, because Parliament wrote it down.

The Osteopaths Act 1993 created a body corporate known as the General Osteopathic Council and required it to develop and regulate the profession, with the protection of the public as its overarching objective. It establishes statutory committees covering education, investigation, professional conduct and health, and requires a Registrar of Osteopaths to maintain a public register showing each osteopath’s type of registration and practice address.

Section 32 is the part with teeth. A person who describes themselves, expressly or by implication, as an osteopath or by a similar osteopathic title “is guilty of an offence unless he is a registered osteopath.” On summary conviction the penalty is a fine not exceeding level five on the standard scale. The regulator’s own enforcement policy lists five protected titles: osteopath, osteopathic practitioner, osteopathic physician, osteopathist and osteotherapist.

Enforcement is real. The council issues cease and desist letters, brings private prosecutions in the most serious cases, and seeks both its costs and publicity on a conviction. One case it names was against someone advertising as an equine osteopath. The page gives no case counts, so nothing here shows how common unlicensed practice is.

None of this has an American equivalent, and that is the point a US reader needs. There is no United States pathway to the non-physician version of the title. If you see the word osteopath on an American website, you are looking at either a licensed physician or at a word with no US credential behind it, and there is no examination or license for the second thing.

The treatment most DOs barely use

In April 1998, two researchers at Michigan State University’s College of Osteopathic Medicine mailed a two-page questionnaire to 3,000 randomly selected osteopathic physicians across the United States, asking what shaped their use of osteopathic manipulative treatment. The response rate was 33.2 percent, so roughly a thousand replies.

More than half of the responding physicians used manipulative treatment on fewer than five percent of their patients.

The strongest single predictor of eventual use was whether postgraduate training had been done in osteopathic, allopathic or mixed-staff facilities. The authors’ own framing was that the technique was becoming a lost art inside the profession.

Two caveats travel with that figure and should never be dropped. The survey was fielded in April 1998, which makes it more than a quarter of a century old. And a 33 percent response rate invites non-response bias, plausibly in the direction that makes the real figure worse rather than better, since physicians who use manipulation seem likelier to answer a survey about it.

No more recent equivalent was found for this article. A 2025 item from the osteopathic association on the same question carries no figures at all. The honest statement is that the best available number is old and nothing current has replaced it.

What this means at the appointment desk is simple. Booking with a DO is booking with a physician, and manipulative treatment is an option some of them offer rather than a feature of the visit. If you want it, ask for it by name before you book.

What the treatment is, and what three reviews say

Osteopathic manipulative treatment is not one technique but a family, and the parts behave differently. High-velocity low-amplitude thrust is the quick push that produces the audible pop. Muscle energy uses the patient’s own resisted contractions against the practitioner’s counterforce. Myofascial release applies sustained pressure to connective tissue. Counterstrain positions a joint away from pain and holds it. Cranial technique is its own argument, below.

Spinal manipulation as a technique, its effectiveness and its vascular safety record belong to this library’s article on spinal manipulation, which covers the thrust itself, the chiropractic trial evidence and the question of neck manipulation and artery tears. What follows is about the multi-technique package as a system.

Readers are often told a Cochrane review found manipulative treatment effective for back pain. There is no Cochrane review of osteopathic manipulative treatment as a whole for low back pain. What exists is sharper and less flattering.

In February 2015, Cochrane published a review of muscle energy technique for non-specific low back pain, led by Helge Franke with Gary Fryer and two methodologists. Twelve randomized trials yielded 14 comparisons and 500 participants in total, every study but one at high risk of bias, all reporting short-term outcomes only. For the largest comparison, muscle energy added to other therapies for chronic low back pain, the pooled pain difference across seven studies and 232 participants was 0.00 on a 100-point scale, with an interval from minus 2.97 to 2.98. Disability came in at a standardized difference of minus 0.18, interval minus 0.43 to 0.08. Against a sham version of the technique, from a single trial of 20 patients, the estimate was wide and uninformative. The reviewers concluded that the studies conducted to date generally provide low-quality evidence that the technique is not effective.

Note who wrote that. Helge Franke is also first author of the 2014 meta-analysis that is the most-cited positive result in this field, published in BMC Musculoskeletal Disorders after an October 2013 search. That review examined 15 studies, 12 at low risk of bias, and reported moderate-quality evidence of effect on pain, a mean difference of minus 12.91 with an interval of minus 20.00 to minus 5.82, and on function, a standardized difference of minus 0.36, interval minus 0.58 to minus 0.14, measured three months after treatment. The same paper reported a postpartum pain effect of minus 41.85 on a 100-point scale, a figure far outside anything the wider manual therapy literature produces, and its authors asked for larger trials with stronger comparison groups.

A second synthesis took the opposite approach and restricted itself to trials with a sham or placebo arm. Published in November 2024 in the journal Diseases, with Edzard Ernst as senior author, it searched to September 2024 and included nine studies. Pooled pain intensity across seven studies and 1,173 patients came to a standardized difference of minus 0.15, with an interval from minus 0.38 to 0.08, which crosses zero. Disability across six studies and 1,153 patients came to minus 0.09, interval minus 0.25 to 0.08, also crossing zero. The reviewers graded their own certainty no higher than moderate, and lower than that for some outcomes. The authors concluded that the treatment is not superior to sham or placebo for pain, disability or quality of life in neck or low back pain.

The newest synthesis goes the other way. Published in the Journal of Osteopathic Medicine in May 2026, searching through October 2025, it found seven trials with about 378 participants in total. Across five trials, pain fell by 1.32 points on a ten-point scale, interval minus 1.71 to minus 0.93. The sham-controlled function result was a standardized difference of 1.75, interval 1.37 to 2.13, and it rests on two trials. Certainty was graded moderate.

Lay those three side by side and the reason they disagree is visible without picking a winner. The comparators differ: one restricted itself to sham, the others pooled sham with usual care and waiting lists. The timing differs, three months against six weeks or less. And the patient numbers differ by an order of magnitude for the same outcome, with 1,153 patients behind the null disability estimate and two trials behind the large positive one. The affiliations sit on opposite sides too. All five authors of the newest review work in a department of osteopathic principles and practice at an osteopathic college, publishing in the profession’s own journal, while the null review’s senior author is the field’s most prominent critic. A standardized difference of 1.75 from two small trials is a red flag rather than a reassurance.

Two further Cochrane reviews do touch the treatment. A 2015 review of low back and pelvic pain in pregnancy, covering 34 trials and 5,121 women, reported moderate-quality evidence from individual studies that osteomanipulative therapy significantly reduced low back pain and functional disability, with craniosacral therapy or acupuncture improving pelvic pain more than usual prenatal care. A 2022 review of chest physiotherapy for pneumonia found that manipulative treatment may improve cure rate against placebo, a risk ratio of 1.59 with an interval of 1.01 to 2.51 from two trials and 79 patients, at very low certainty, with no clear effect on mortality or length of stay.

One more verified point about guidelines, because the claim gets made loosely. The American College of Physicians published a clinical practice guideline on noninvasive treatment of low back pain in February 2017. It names spinal manipulation, at low-quality evidence, inside strong recommendations for both acute and chronic low back pain. It does not name osteopathic manipulative treatment. Guidelines in this area recommend the technique category without specifying which profession performs it, and that distinction is worth holding onto.

The cranial question

Cranial technique is taught inside osteopathy and has a close cousin, craniosacral therapy, practiced largely outside it. The tradition holds that the bones of the skull retain a small rhythmic motion, that a trained hand can feel it, and that a core link transmits it along the membranes of the spinal canal to the sacrum, so the rhythm palpated at the head and at the base of the spine should match.

That is a perceptual claim, and it has been tested directly twice.

In October 1994, the American Physical Therapy Association’s journal published a study in which three physical therapists with expertise in craniosacral therapy each examined the same 12 subjects, children and adults whose histories included physical trauma, surgery or learning disability, reporting the rate they felt to a nurse who had already recorded heart and respiratory rates. The intraclass correlation between examiners, a measure of agreement where 1 means perfect, was minus 0.02. The authors concluded that therapists were unable to measure the motion reliably and that the measurement error might be large enough to make many clinical decisions potentially erroneous.

In 2001, the chiropractic profession’s own journal published the more elegant design. Two registered osteopaths with postgraduate cranial training palpated 11 healthy subjects, each clinician feeling for the rhythm at the head and at the sacrum simultaneously and marking full flexion by pressing silent foot switches wired to a computer. They were blind to each other’s results and could not communicate.

Both findings matter and an honest account reports both. Each examiner was internally consistent, with correlations from plus 0.52 to plus 0.73 for their own repeated readings. No two examiners agreed with each other, with correlations from minus 0.09 to plus 0.31. And the rate measured at the head differed significantly from the rate measured at the sacrum on the same person at the same moment. The authors concluded that the results fail to support the core-link hypothesis as its proponents traditionally hold it.

The intra-examiner consistency is the part usually dropped, and dropping it turns reporting into mockery. Practitioners are not inventing readings at random. They are reliably perceiving something that is not shared between them and does not behave the way the theory says it should.

On treatment, two systematic reviews by the same pair of authors reached matching verdicts. Their 2011 review of cranial osteopathic manipulative medicine, published in the osteopathic association’s own journal, found eight studies and rated their quality from 14 to 23 out of a maximum 27, median 16, concluding the evidence was heterogeneous and insufficient for definitive conclusions. Their 2012 review of craniosacral therapy as a standalone treatment found seven studies, with quality scores running from 2 to 22 out of the same maximum. A floor of 2 out of 27 is not a near miss.

Harm, and what anyone looked for

The controlled trials report very little harm. A 2025 systematic review in BMJ Open covering five randomized trials and 676 older adults, mean age 77.3 years, found all five reported adverse events and none were serious, while concluding that the evidence on benefit was limited and inconclusive. The 2026 review above recorded no serious adverse events where they were monitored.

Against that, the Cochrane pneumonia review recorded transient muscle tenderness after treatment in two participants of one trial, and in another trial three serious adverse events that led to early withdrawal. The best-quantified harm signal in this family comes from spinal manipulation generally rather than from the osteopathic package: a 2024 review of manipulation for migraine pooled two trials and found an increased risk of adverse events, a risk ratio of 2.06 with an interval of 1.24 to 3.41, giving a number needed to harm of six, at very low certainty.

The accurate summary is therefore not that the treatment is safe. It is that the trials recorded few serious events and were mostly not built to detect harm, a limitation the reviewers themselves name.

Questions that get you a useful answer

Three questions are worth more here than any amount of credential-reading.

Will manipulative treatment be part of this visit, and which techniques? Most DOs rarely use it, so if you want it, say so, and if you do not, say that too.

If cranial technique is proposed, what should it achieve, and what will tell us it is not working? The reliability evidence above belongs in that conversation.

What happens if this does not help? A physician has a differential diagnosis and a threshold for imaging. Knowing theirs is more useful than knowing their technique list.

If one sentence is worth keeping, keep this one. The word describes a physician in one country and a manual therapist in another, and inside the American profession the manipulation that gives it its name is a minority activity. Both halves change what you should expect when you walk in, and the second half is the one nobody tells you.

Sources

  1. US Department of Education. “Programmatic Accrediting Agencies.” ed.gov
  2. American Association of Colleges of Osteopathic Medicine. “Board Examinations and Licensure.” aacom.org
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  4. The DO (American Osteopathic Association). “Number of DOs, osteopathic medical students surpasses the 200K mark, 30 October 2025, reporting the AOA's 2025 Osteopathic Medical Profession Report.” thedo.osteopathic.org
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