What Is a DO Program in Osteopathic Medicine?

A DO program is a four-year doctoral program at a college of osteopathic medicine that trains students to become fully licensed physicians with the Doctor of Osteopathic Medicine (DO) degree. These programs cover the same core medical sciences and clinical rotations as MD programs but add extensive training in osteopathic manipulative treatment, a hands-on diagnostic and therapeutic approach rooted in the musculoskeletal system. Graduates can practice in every medical and surgical specialty, prescribe medications, and perform surgery, yet the path from classroom to residency carries distinct features and challenges worth understanding.

Where Osteopathic Medicine Came From

The DO degree traces back to Andrew Taylor Still, a frontier physician who had trained as a conventional Doctor of Medicine in the 1850s. Dissatisfied with the medical standards of his era, Still developed a new therapeutic system he called osteopathy and founded the American School of Osteopathy in 1892, making him the first Doctor of Osteopathy.¹ His approach blended conventional Western medicine with hands-on physical treatment and an emphasis on promoting health rather than just fighting disease. Early osteopathic principles drew on the idea that the body’s structure and function are deeply interconnected, so treating the musculoskeletal framework could help the entire body heal.

Over the next century, osteopathic medical schools expanded from that single rural institution into a network of colleges across the United States. The curriculum steadily aligned with allopathic (MD) medical education in pharmacology, surgery, pathology, and all other core disciplines, while retaining the additional training in osteopathic philosophy and manual techniques. Today, more than 40 accredited colleges of osteopathic medicine operate in the U.S., and roughly a quarter of all medical students in the country are enrolled in DO programs.

What DO Students Actually Study

The first two years of a DO program look remarkably similar to an MD program. Students study anatomy, biochemistry, physiology, microbiology, pharmacology, and pathology. They learn to take patient histories, conduct physical examinations, and develop clinical reasoning. The major curriculum addition is osteopathic manipulative medicine, typically taught as its own course sequence running alongside the basic sciences. Students practice a wide range of hands-on techniques, from high-velocity thrusts similar to chiropractic adjustments to gentler myofascial release and cranial techniques.

The final two years consist of clinical rotations in hospitals and outpatient clinics, covering internal medicine, surgery, pediatrics, obstetrics, psychiatry, and family medicine. DO students rotate through the same types of clinical settings as their MD counterparts, and in many cases they train side by side at the same hospitals. The philosophical backbone of osteopathic education emphasizes treating the whole patient rather than isolated symptoms, though in day-to-day clinical training the practical overlap with MD education is substantial.

Licensing Exams and How They Differ

Graduating from a DO program is only part of becoming a licensed physician. DO graduates have historically taken the Comprehensive Osteopathic Medical Licensing Examination (COMLEX-USA) series to meet state licensure requirements.² COMLEX is a three-step exam that covers the same breadth of medical knowledge as its allopathic equivalent but includes content on osteopathic principles and manipulative treatment.

Over the past two decades, however, a growing number of DO students have also taken the United States Medical Licensing Examination (USMLE), which is the standard licensing pathway for MD graduates.² The main reason is practical: many residency programs, particularly competitive ones, have historically used USMLE scores in their selection process, and some program directors are simply more familiar with USMLE scoring. Sitting for both exam series means extra study time and extra fees, but many DO students view it as a strategic move to keep more residency doors open.

The Residency Merger and What It Changed

Until recently, DO and MD graduates trained in separate residency systems. MD residency programs were accredited by the Accreditation Council for Graduate Medical Education (ACGME), while osteopathic residencies fell under the American Osteopathic Association (AOA). Between 2015 and 2020, a major structural change called the Single Accreditation System unified all residency training under the ACGME.³ The goal was to expand access for DO graduates, standardize training quality, and eliminate a two-track system that had created confusion in some specialties.

In certain fields the merger clearly opened doors. In otolaryngology, for instance, the unified system was associated with a substantial increase in osteopathic match outcomes without any observable decline in match rates for MD graduates.⁴ In family medicine and pathology, DO representation also grew. In physical medicine and rehabilitation, osteopathic application proportions rose after the merger, though gains in match share slowed compared to the pre-merger trend.⁵

The merger also came with costs. Many formerly AOA-accredited residency programs closed rather than transition to ACGME standards, reducing the total number of training slots where DO graduates had previously matched comfortably. This loss of familiar training pathways hit smaller and community-based programs especially hard.

Persistent Barriers in Competitive Specialties

Despite the merger’s aims, DO applicants still face steep challenges in the most competitive fields. Dermatology, ophthalmology, plastic surgery, neurosurgery, and orthopedic surgery all show disproportionately lower match rates for osteopathic graduates, along with limited representation in top-tier residency programs.³ The barriers are partly structural: DO students often have less access to research mentorship at their home institutions, and some residency programs carry degree-based bias in their selection processes.

The numbers in dermatology are particularly stark. One analysis found that the apparent increase in DO representation in dermatology after unification was misleading, because it was driven almost entirely by formerly AOA programs converting to ACGME status rather than by DO graduates gaining new spots in traditionally ACGME programs. The true post-unification match rate for DO applicants in traditionally ACGME dermatology programs was actually lower than before the merger. Meanwhile, over a quarter of the converted formerly AOA positions in competitive specialties were filled by MD applicants.⁶ For a DO student with ambitions in a highly competitive specialty, this landscape demands early planning, strong research output, and realistic expectations.

The Evidence Behind Osteopathic Manipulative Treatment

Osteopathic manipulative treatment is the clinical skill that most clearly separates a DO’s training from an MD’s. But how strong is the evidence that it actually helps patients? The answer depends on the condition being treated and how you measure success.

For low back pain, which is the most-studied application, a meta-analysis of randomized controlled trials found that OMT produced a statistically significant reduction in pain compared to both active treatments and no-treatment controls, with benefits appearing at short-, intermediate-, and long-term follow-up.⁷ That said, the effect size was modest. A large French randomized trial comparing real OMT to sham OMT (where therapists mimicked the techniques without applying therapeutic force) found a small difference in favor of real treatment in reducing activity limitations at three months, but the researchers themselves questioned whether the improvement was large enough to matter clinically.⁸

Research on OMT for other conditions is thinner. A scoping review of OMT for ear infections in children concluded with low certainty that the techniques may offer modest benefits in reducing recurrence rates and improving middle ear function, but emphasized that the existing evidence is too limited to draw firm conclusions.⁹ There is also early research suggesting OMT techniques applied to the cervical region may influence autonomic nervous system activity, as measured through changes in heart rate variability, though the precise mechanism remains unclear.¹⁰

The honest picture is that OMT has the strongest support for musculoskeletal pain, particularly in the lower back, but even there the effects are relatively small. For most other conditions, research is preliminary. Many practicing DOs use OMT sparingly or not at all, depending on their specialty and patient population, so the hands-on techniques are best understood as an additional tool rather than the centerpiece of modern osteopathic practice.

How DO and MD Physicians Compare in Practice

Once training is complete, the daily work of a DO and an MD in the same specialty is largely indistinguishable. Both prescribe the same medications, order the same tests, and perform the same procedures. But do patients fare any differently depending on which degree their doctor holds?

A large study comparing surgical outcomes between DO and MD surgeons found no evidence that 30-day mortality differed between the two groups, with adjusted mortality rates of about 1.6% for both. There was also no difference in 30-day hospital readmission rates or length of stay.¹¹ The study did find that DO surgeons were more likely to operate on older patients, Medicaid dual-eligible patients, and patients in public hospitals, and they performed a lower proportion of elective operations. In other words, DO surgeons tended to serve slightly more medically complex and socioeconomically disadvantaged populations while achieving equivalent outcomes.

On the interpersonal side, a registry-based study of pain patients found that patients reported more favorable perceptions of DOs than MDs on measures of interpersonal manner and empathy.¹² Whether that reflects something taught in osteopathic training, the self-selection of empathic individuals into DO programs, or the types of practice settings DOs tend to work in is hard to tease apart. But it aligns with the osteopathic philosophy’s emphasis on treating the patient as a whole person rather than a collection of symptoms.

Common Misconceptions About DO Programs

Several persistent myths trip up prospective students and patients alike. One is that a DO is not a “real doctor.” This is flatly wrong. DOs hold a doctoral degree, complete residency training, pass national licensing exams, and hold the same practice rights as MDs in every U.S. state. Another misconception is that DO programs are easier to get into and therefore produce lower-quality physicians. While average admissions metrics at many DO schools are somewhat lower than at many MD schools, the clinical training requirements and licensing standards are equivalent. The surgical outcomes data cited above reinforces that point: patient results do not differ by degree type.

A third misconception runs in the opposite direction, assuming that DOs are primarily manual therapists or alternative medicine practitioners. The vast majority of practicing DOs function exactly like MDs in their chosen specialty. Many never use OMT after residency. The hands-on training is a distinctive feature of the education, but it does not define most DOs’ careers in practice.

Choosing a DO Program as a Prospective Student

If you are weighing a DO program against an MD program, several practical differences are worth considering beyond curriculum content. DO schools tend to have a stronger orientation toward primary care and community medicine, and many are located in underserved areas with the explicit mission of training physicians to serve those communities. If your goal is family medicine, internal medicine, or pediatrics in a community setting, that alignment can be an advantage in both training and professional identity.

If your ambitions lean toward a competitive surgical subspecialty or academic medicine, the path from a DO program is steeper but not impossible. You will likely need to take both COMLEX and USMLE, pursue research experiences outside your home institution, and network strategically to overcome the degree-based bias that still influences some residency selection committees. Students who plan ahead and are realistic about these challenges routinely match into competitive programs, but the extra effort is real and should be factored into your decision.

Cost is another practical consideration. Many newer DO schools are private, and tuition can rival or exceed that of some MD programs. Weigh the total cost of attendance, including living expenses and the potential need for additional exam fees, against the earning trajectory in your intended specialty. A DO degree will not limit your licensure or scope of practice, but the financial calculus of getting there varies by institution.

OMT in Everyday Clinical Use

For practicing DOs who do incorporate OMT, the techniques show up most often in outpatient musculoskeletal care and in primary care settings where patients present with neck pain, back pain, headaches, or joint stiffness. Some DOs in hospital-based practice use OMT as an adjunct for patients recovering from surgery or dealing with pneumonia, drawing on the reasoning that improving rib cage mobility and lymphatic flow may support recovery. This is one of the more intriguing applications, as a clinical trial of older adults hospitalized with pneumonia found that adding OMT to conventional medical care was associated with a one-day reduction in hospital stay and, in a subset analysis, reduced respiratory failure or death.

Still, the integration of OMT into clinical practice is uneven. A DO working as a cardiologist or psychiatrist may never perform a single manipulative technique in their career. Others, particularly those in sports medicine, physical medicine and rehabilitation, or family practice, may use it daily. The degree gives you the skill; whether you use it is shaped by your specialty, your patient population, and frankly whether you found the techniques effective during your training years. Osteopathic medical education is moving toward letting that individual flexibility be a strength rather than a source of identity crisis, acknowledging that the philosophy of whole-person care can be practiced with or without hands-on treatment.

Where DO Graduates Practice

One of the clearest demographic patterns in osteopathic medicine is its footprint in rural and underserved communities. DO programs have historically emphasized training physicians for areas with physician shortages, and the data bears that out. DO surgeons, as one study showed, were more likely to practice in public hospitals and serve Medicaid-eligible patients than their MD counterparts.¹¹ This pattern extends across primary care, where DOs make up a disproportionate share of the physician workforce in small towns and rural counties.

For communities that struggle to attract doctors, the growth of DO programs has been a meaningful pipeline of new physicians. Whether that pipeline shifts as newer DO schools open in suburban and urban areas, and as more osteopathic graduates pursue competitive urban-based specialties, remains an open question that the profession continues to grapple with.