In the United States, a Doctor of Osteopathic Medicine (DO) is a fully licensed physician with the same legal authority to prescribe medication, perform surgery, and practice in every medical specialty as a Doctor of Medicine (MD). The two degrees lead to the same destination through slightly different educational paths, and patient outcomes under their care are statistically indistinguishable. The confusion arises because the word “osteopath” means something quite different depending on where in the world you are, and because the history of the DO degree is tangled with a century of professional rivalry that still leaves traces today.
What a DO Actually Is
A DO completes four years of medical school covering the same core curriculum as an MD student: anatomy, biochemistry, pharmacology, pathology, clinical rotations in internal medicine, surgery, pediatrics, obstetrics, psychiatry, and so on. The distinguishing addition is training in osteopathic manipulative treatment (OMT), a set of hands-on techniques for diagnosing and treating musculoskeletal problems. After medical school, DOs enter the same residency programs as MDs, train under the same accreditation body (the Accreditation Council for Graduate Medical Education, or ACGME), and can specialize in anything from family medicine to neurosurgery. Every U.S. state grants DOs full, unrestricted medical licenses.
The licensing exams do differ. DO students typically take the COMLEX-USA, the osteopathic licensing examination, though many also sit for the USMLE, which is the standard MD licensing exam. Both pathways lead to the same license, and the question of whether osteopathic students should be required to take one or both exams has been a long-running policy debate within graduate medical education.
How the Two Degrees Diverged
Osteopathic medicine traces back to Andrew Taylor Still, who had trained and practiced as a conventional physician on the American frontier in the 1850s before growing disillusioned with the medical practices of his era. In 1892, he founded the American School of Osteopathy in Kirksville, Missouri, establishing a new discipline that combined Western medical principles with manual therapy and an emphasis on the body’s ability to heal itself.1MDPI / Healthcare. The Revisions of the First Autobiography of AT Still, the Founder of Osteopathy, as a Step towards Integration in the American Healthcare System At the time, this was framed as an alternative to mainstream medicine, not a branch of it.
Over the following century, osteopathic medical education steadily converged with allopathic (MD) education. Osteopathic schools adopted the same biomedical sciences curriculum, added the same clinical training requirements, and their graduates increasingly entered the same hospitals and residency programs. A dramatic inflection point came in 1961, when the California Osteopathic Association pushed through a merger with the California Medical Association that converted DO degrees to MD degrees and effectively eliminated the osteopathic profession in that state for a generation.2PubMed. “Whatever you are, be a good one”: osteopathic identity, equality, and the california merger The osteopathic community largely views that episode as a cautionary tale, and it reinforced the profession’s determination to maintain its separate identity while continuing to seek educational and practice parity with MDs.
The most consequential structural change happened more recently. In 2020, the previously separate accreditation systems for MD and DO residency programs completed a merger under a single system, the ACGME. This meant that DO graduates could now apply to any ACGME-accredited residency on the same footing as MD graduates, at least in principle.
Do Patients Get the Same Quality of Care?
The evidence on this is reassuringly clear. A large study published in JAMA Surgery compared outcomes for patients treated by DO versus MD surgeons and found no difference in 30-day mortality, readmission rates, or length of hospital stay after adjusting for patient and procedure characteristics.3JAMA Surgery. Comparison of Outcomes for Patients Treated by Allopathic vs Osteopathic Surgeons The adjusted mortality rates were nearly identical, and readmission rates and hospital stays were statistically indistinguishable. Whatever differences exist between DO and MD training, they do not appear to translate into different patient outcomes.
This makes intuitive sense when you consider that both types of physicians complete the same residency programs, pass comparable licensing exams, and are held to the same standards of care in clinical practice. By the time a doctor is board-certified and practicing independently, the specific letters after their name tell you very little about the quality of care you will receive.
What About Osteopathic Manipulative Treatment?
OMT is the piece of DO training that has no equivalent in MD education. It involves using the hands to diagnose, treat, and prevent musculoskeletal conditions through techniques like stretching, gentle pressure, and resistance. The evidence for OMT is mixed but not dismissive. A systematic review and meta-analysis of randomized controlled trials found that OMT significantly reduced low back pain compared with both active treatments and no treatment, with benefits observed at short, intermediate, and long-term follow-up.4PubMed Central. Osteopathic manipulative treatment for low back pain: a systematic review and meta-analysis of randomized controlled trials
The picture gets murkier when you compare OMT to sham manipulation, which is the more rigorous test of whether the technique itself matters or whether simply being touched and attended to is what helps. One randomized trial found that patients receiving real OMT reported greater improvements than those getting no treatment at all, but the differences between real and sham OMT were not significant.5PubMed. Osteopathic manipulative treatment for chronic low back pain: a randomized controlled trial A larger and more recent trial did find a statistically significant advantage of real OMT over sham for activity limitations at three months, but the researchers themselves noted the clinical relevance of this small effect was questionable, and there was no difference in pain, quality of life, or medication use between the two groups.6JAMA Internal Medicine. Effect of Osteopathic Manipulative Treatment vs Sham Treatment on Activity Limitations in Patients With Nonspecific Subacute and Chronic Low Back Pain
Here is the twist that surprises many people: most DOs in practice do not actually use OMT with any regularity. A national survey found that roughly three-quarters of responding osteopathic physicians reported using OMT on fewer than 5 percent of their patients, and more than half reported not using it at all.7PubMed. Osteopathic manipulative treatment (OMT) use among osteopathic physicians in the United States In daily practice, a DO cardiologist or a DO emergency medicine physician looks essentially identical to their MD counterparts. OMT training is a defining feature of osteopathic education, but it plays a vanishingly small role in most DOs’ clinical work.
The Residency Match Gap
If DOs and MDs have equivalent licenses and produce the same patient outcomes, you might expect them to have equal access to residency training positions. They do not, at least not yet. The single accreditation system has helped: DO graduates have shown increasing match rates into programs that were previously ACGME-only.8PubMed Central. Single Accreditation and The Match: How Does the Change Affect Osteopathic Graduates? But the gains are uneven across specialties.
In competitive surgical subspecialties, the disparities are stark. A study tracking the 2020 through 2023 match cycles found that overall match rates for DO applicants to selected surgical subspecialties were around 53 percent, compared with roughly 74 percent for MD applicants. The gaps were especially wide in plastic surgery, where DO match rates were in the single digits, and in neurosurgery and thoracic surgery, where DOs matched at roughly a third to half the rate of MDs.9PubMed Central. Comparison of Osteopathic (DO) and Allopathic (MD) Candidates Matching Into Selected Surgical Subspecialties In fields like orthopedic surgery and general surgery, the gap narrowed but still existed.
A review of the merger’s effects across specialties confirmed that while family medicine and pathology saw meaningful gains for DO applicants, persistent barriers remain in dermatology, ophthalmology, plastic surgery, neurosurgery, and orthopedic surgery. The review pointed to structural challenges: the closure of many formerly osteopathic-led residency programs during the merger, limited access to research mentorship at osteopathic medical schools, and degree-based bias among some residency selection committees.10PubMed Central. Effects of the allopathic and osteopathic graduate medical education merger on U.S. specialty training: a review The bias piece is hard to quantify but widely acknowledged within the profession. Some program directors appear to view DO degrees as a signal of weaker candidacy, independent of the applicant’s actual qualifications.
Perception and Stigma
The residency match data hints at a broader perception problem. A study of pathology residency program leaders found that while their actual experience training DO residents was equivalent to their experience with MD residents, they acknowledged that negative perceptions of osteopathic physicians exist within the medical profession and are often reinforced by informal online content and social media.11PubMed Central. Leadership perspectives on osteopathic medical school applicants to pathology residency training This finding captures something important: the stigma is often disconnected from first-hand experience. People who have actually worked with DOs tend to rate them the same as MDs, but the broader perception environment lags behind.
Among patients, most do not know what DO stands for, and those who do sometimes confuse it with chiropractic or other non-physician disciplines. This confusion is not entirely unreasonable given the historical origins of osteopathy and the fact that the word means something completely different outside the United States. If you are a patient, the practical advice is simple: check whether your doctor is licensed as a physician in your state. If they are, the DO or MD distinction tells you almost nothing about their competence, scope of practice, or quality of care.
Why “Osteopath” Means Something Different Overseas
Outside the United States, the title “osteopath” typically refers to a non-physician manual therapist, someone more comparable to a chiropractor or physical therapist than to a medical doctor. A comparative analysis of international osteopathic regulation explicitly excluded the United States from its scope because U.S.-trained DOs are fully licensed physicians whose education, scope of practice, and regulatory framework differ substantially from the osteopathic practitioner model regulated in countries like the United Kingdom, Australia, France, and others.12Elsevier / International Journal of Osteopathic Medicine. International competency and regulatory standards in osteopathic practice
In those countries, osteopaths typically hold a bachelor’s or master’s degree in osteopathy, not a medical doctorate. They cannot prescribe medication, order advanced imaging, or perform surgery. Their practice centers on musculoskeletal assessment and manual therapy. This is a legitimate and regulated profession in many jurisdictions, but it is not the same thing as being a physician. The shared terminology is one of the biggest sources of confusion in this space. A British osteopath and an American DO have almost nothing in common professionally, despite the overlapping name.
If you encounter an “osteopath” outside the U.S. and want to know whether they are a doctor in the medical sense, the answer is almost certainly no. If you encounter a DO in the United States, the answer is yes. The context matters enormously.
Where DOs Practice
One area where DOs and MDs genuinely differ is in their geographic practice patterns. Osteopathic medical schools have historically been located in smaller cities and rural areas, and they have long emphasized primary care and community medicine. This legacy shows up in the data. A national analysis of attending surgeons found that DO surgeons were about twice as likely as MD surgeons to practice in rural areas, with roughly 18 percent of DOs in rural settings compared to about 10 percent of MDs. DO surgeons also practiced in more socioeconomically deprived communities on average.13PubMed Central. Surgical Care in Rural and Underserved Populations: National Analysis of Attending Surgeons
This is not a reflection of inferior training or limited options. Many osteopathic medical schools were founded specifically to address physician shortages in underserved communities, and they continue to recruit and train students with ties to those areas. The result is that DOs fill a disproportionate share of the primary care and rural healthcare workforce, which makes them critical to healthcare access in parts of the country where physician shortages are most acute.
Choosing Between a DO and an MD
For patients, there is no clinically meaningful reason to prefer one degree over the other. Both undergo rigorous medical training, both are licensed to practice the full scope of medicine, and the best available evidence shows no difference in patient outcomes. If you have a preference for a physician who might incorporate hands-on musculoskeletal treatment into your care, a DO could be a good fit, though as noted earlier, most DOs in practice do not regularly use OMT.
For prospective medical students, the choice is more nuanced. DO medical schools tend to have somewhat lower average admissions statistics than MD schools, which makes them an important pathway for students who are committed to medicine but may not have the numbers for the most competitive MD programs. The tradeoff is real but shrinking: DO graduates face stiffer competition in certain highly competitive specialty matches, and some degree-based bias persists in residency selection. In primary care, emergency medicine, psychiatry, and many other fields, the two degrees are functionally interchangeable for career purposes.
The Licensing Exam Question
One lingering structural wrinkle is the dual-exam system. DO students have their own national licensing exam, COMLEX-USA, which is sufficient for medical licensure in all 50 states. But many DO students also take the USMLE, the exam designed for MD students, because some residency programs prefer or require USMLE scores for comparison purposes.14Europe PMC / Journal of Graduate Medical Education. COMLEX-USA and USMLE for Osteopathic Medical Students: Should We Duplicate, Divide, or Unify? This puts DO students in the position of sometimes preparing for and paying for two separate high-stakes exams, a burden their MD peers do not share. The policy debate over whether to unify or streamline these exams has been going on for years without resolution, and it reflects the broader tension between maintaining a distinct osteopathic identity and pursuing full practical equivalence with the MD pathway.
From a patient’s perspective, this is invisible. Your DO physician passed a national licensing exam, met the same minimum competency threshold as an MD, and holds the same unrestricted license. The exam logistics are a problem for the profession and its students, not for you.
The Philosophical Difference That Mostly Isn’t
Osteopathic medicine officially embraces a set of guiding principles: that the body is an integrated unit, that the body has self-healing mechanisms, that structure and function are interrelated, and that rational treatment is based on understanding those principles. These are taught in every osteopathic medical school and featured on every osteopathic organization’s website. In practice, they describe something that most thoughtful physicians of either stripe already believe. The idea that you should treat the whole patient and not just the disease is not unique to osteopathic medicine, even if osteopathic education gives it more explicit emphasis.
Where you can sometimes see a real difference is in how osteopathic physicians approach musculoskeletal complaints. A DO who uses OMT regularly may spend more time with hands-on assessment of a patient’s spine or joints than an MD internist would. But this varies enormously by individual practitioner, specialty, and practice setting. A DO hospitalist managing sepsis in an ICU is doing the exact same work as an MD hospitalist down the hall. The philosophical overlay is more of a professional identity marker than a clinical differentiator for most practicing physicians.