“Boards” in medicine refers to two related but distinct things: the certification exams doctors take to prove expertise in a specialty, and the organizations that administer those exams and set professional standards. When someone says a doctor is “board certified,” it means they passed a rigorous specialty exam after completing their training. There are also state medical boards, which serve a completely different function: licensing doctors to practice and disciplining those who violate standards of care.
Two Types of Boards, Two Different Jobs
State medical boards are government agencies. Every state has one, and their job is straightforward: grant licenses that allow doctors to practice medicine within that state, investigate complaints from patients, and take disciplinary action when a physician acts unethically or incompetently. A doctor cannot legally see patients without a state license.
Specialty certification boards are something different entirely. These are professional organizations that test whether a doctor has deep expertise in a specific field like cardiology, surgery, or pediatrics. This certification is voluntary and goes beyond what a state license requires. A doctor can legally practice without board certification, but most hospitals and insurance networks expect it, and patients increasingly look for it as a marker of quality.
How Specialty Certification Works
The path to board certification follows a predictable sequence. After finishing medical school and earning either an MD or DO degree, a doctor must pass the United States Medical Licensing Examination to get a state license. Then comes residency, a supervised training period in a chosen specialty that lasts three to seven years depending on the field. During this time, the doctor is considered “board eligible,” meaning they’re on track but haven’t yet taken the certification exam.
The certification exam itself typically happens during the final year of residency or shortly after. Most exams are computer-based, though some boards require two parts: a written test covering general knowledge and a second focusing on the specific specialty. Certain fields also require an oral exam where candidates talk through clinical scenarios with examiners. Pass the exam, and you’re board certified.
Doctors who want to narrow their focus even further can pursue subspecialty certification. A cardiologist, for instance, might get additional certification in interventional cardiology or heart failure. This requires completing a fellowship (extra years of focused training beyond residency) and passing another exam.
The 24 Recognized Specialty Boards
The American Board of Medical Specialties (ABMS) is the umbrella organization that oversees 24 member boards, each responsible for a different area of medicine. These range from broad fields like internal medicine, family medicine, surgery, and pediatrics to narrower specialties like nuclear medicine, colon and rectal surgery, and medical genetics. Together, these 24 boards cover virtually every area of physician practice.
Osteopathic physicians (DOs) have a parallel system through the American Osteopathic Association, which offers its own board certifications. During a recent transition period, ABMS boards also began offering certification to osteopathic physicians under specific circumstances, so the two systems now overlap more than they once did.
What It Costs
Board exams are not cheap. The American Board of Internal Medicine, one of the largest certifying bodies, charges $1,430 for the initial internal medicine certification exam. Subspecialty exams cost more: $2,325 for fields like gastroenterology, oncology, and infectious disease, and $2,480 for cardiovascular specialties. Neurocritical care tops out at $2,995. Late registration adds $400, and testing at an international center costs an extra $500. Fees vary across the 24 boards, but the financial commitment is significant at every level.
Certification Doesn’t Last Forever
Board certification isn’t a one-time achievement. Most specialty boards require doctors to participate in Maintenance of Certification (MOC), an ongoing cycle of continuing education, self-assessment, and periodic re-examination. The American Board of Pediatrics describes it as “the continuous and ongoing process of lifelong learning, assessment, and health care improvement.” The specific requirements and cycle lengths vary by board, but the underlying principle is the same: medicine changes, and certified doctors are expected to keep up.
Does Board Certification Actually Matter?
There’s real evidence that it does. A Harvard Medical School study analyzed patient outcomes for nearly 7,000 newly trained hospitalist physicians across 455,000 hospitalizations. Patients treated by doctors who scored in the top 25 percent on their board exam had 8 percent lower odds of dying within seven days of hospitalization compared to patients of doctors who scored in the bottom 25 percent. Both groups had passing scores, so even among certified physicians, exam performance correlated with measurably better outcomes.
Interestingly, the same study found no connection between patient outcomes and the milestone ratings that residency programs use to evaluate trainees during their training. The board exam, in other words, captured something about physician competence that other evaluation methods missed. This is one reason hospitals, insurers, and credentialing committees treat board certification as more than a formality. It remains the most widely recognized, independently verified signal that a doctor has proven their expertise in a specialty.