There are more than a dozen distinct types of surgeons, each specializing in a specific area of the body or patient population. The American Board of Medical Specialties recognizes 10 primary surgical boards, but within those boards exist dozens of subspecialties and fellowships that narrow a surgeon’s focus even further. Here’s a breakdown of each type, what they operate on, and how their training differs.
General Surgeons
General surgery is the broadest surgical specialty and serves as the foundation for several others. General surgeons operate on the abdomen, digestive tract, skin, breast, and soft tissues. Common procedures include gallbladder removal, hernia repairs, appendectomies, and some cancer operations. Residency training lasts five years after medical school.
Many surgeons use general surgery as a launching point for further specialization. Fellowship-trained subspecialties that branch off from general surgery include surgical oncology, trauma surgery, and minimally invasive surgery. A surgical oncologist, for example, completes general surgery residency and then additional fellowship training focused on removing solid tumors like pancreatic cancer, melanoma, sarcomas, and gastrointestinal cancers.
Orthopedic Surgeons
Orthopedic surgeons treat the musculoskeletal system: bones, joints, ligaments, tendons, and muscles. Training takes five years (one preparatory year plus four in orthopedic surgery), and many orthopedic surgeons then subspecialize further. The American Academy of Orthopaedic Surgeons identifies several distinct subspecialties within the field.
Joint replacement surgeons perform hip, knee, shoulder, and elbow replacements, including complex revision surgeries when a previous implant fails. Sports medicine surgeons focus on injuries from athletics and rely heavily on arthroscopic techniques to treat damaged joints. Spine surgeons handle conditions from herniated discs to scoliosis and complex spinal fusions. Trauma surgeons in orthopedics specialize in acute fracture management across all body regions and age groups. Hand surgeons operate on the intricate structures of the hand and wrist. Foot and ankle specialists treat everything from diabetic foot complications to sports injuries and congenital deformities. And orthopedic oncologists remove bone and soft tissue tumors of the limbs and spine.
Neurosurgeons
Neurosurgeons operate on the brain, spinal cord, and peripheral nerves. Their training is among the longest in medicine: one year of general surgery followed by five years of neurosurgical training, totaling six years after medical school. Some pursue additional fellowships in areas like pediatric neurosurgery or cerebrovascular surgery.
There is significant overlap between neurosurgeons and orthopedic surgeons when it comes to the spine. Both can treat disc degeneration, spinal stenosis, herniated discs, and spine fractures. However, conditions like spinal cord tumors, spina bifida, or tumors between the skull and upper spine require operating inside the brain or the protective membrane of the spinal cord, which only a neurosurgeon performs. In many cases, a surgeon’s specific subspecialty training matters more than whether they carry the neurosurgery or orthopedic label.
Cardiothoracic Surgeons
Cardiothoracic surgeons operate inside the chest. Their scope covers the heart, lungs, esophagus, and other structures within the thoracic cavity. A typical day might include a coronary artery bypass in the morning and a lung lobe removal in the afternoon. Training requires completing a full five-year general surgery residency plus two additional years of thoracic surgery training, making it a seven-year minimum after medical school.
The dominant disease these surgeons treat is atherosclerosis, the same plaque buildup in arteries that vascular surgeons address in other parts of the body. The general dividing line: thoracic surgeons operate inside the chest, while vascular surgeons operate outside it. That boundary has blurred somewhat with newer techniques for repairing aortic aneurysms, which both specialties now perform.
Vascular Surgeons
Vascular surgeons focus on the blood vessels outside the heart and chest, including arteries and veins in the neck, abdomen, and limbs. They treat conditions like carotid artery disease, peripheral artery disease, and aortic aneurysms. Vascular surgery emerged as its own primary specialty relatively recently, with its own dedicated residency programs and board certification through the American Board of Surgery. The traditional path requires completing general surgery training plus one to two additional years in vascular surgery.
Plastic Surgeons
Plastic surgery splits into two categories with a formal distinction defined by the American Medical Association. Cosmetic surgery reshapes normal body structures to improve appearance. Reconstructive surgery repairs abnormal structures caused by congenital defects, trauma, infection, tumors, or disease. Reconstructive surgery is generally covered by insurance, while cosmetic procedures typically are not.
Training involves three years of preparatory surgical training followed by two years of plastic surgery. Many plastic surgeons then add six to twelve months of focused training in a particular area like hand surgery, craniofacial surgery, or microsurgery. Their work ranges from breast reconstruction after cancer treatment to cleft palate repair in children to burn wound management.
Urologists
Urologists operate on the urinary tract in both men and women, as well as the male reproductive system. This includes the kidneys, bladder, ureters, and prostate. Common procedures range from kidney stone removal to prostate cancer surgery. Training takes at least five years: two years of general surgery followed by a minimum of three (usually four) years in urology.
ENT Surgeons
Otolaryngologists, commonly called ENT (ear, nose, and throat) surgeons, operate on the head and neck region excluding the brain and eyes. Training involves one year of general surgery plus four years of otolaryngology. Within the field, subspecialists include head and neck oncologists who remove cancers of the throat, mouth, and related structures; neurotologists who focus on the inner ear and related nerve pathways; rhinologists who specialize in the sinuses and nasal passages; and pediatric otolaryngologists who treat children with conditions like chronic ear infections or airway problems.
Eye Surgeons
Ophthalmologists are the surgeons of the eye. Their training path is unique: one year of broad patient care in a field like internal medicine or pediatrics, followed by three years of ophthalmology residency. They perform procedures ranging from cataract removal and laser vision correction to retinal detachment repair and glaucoma surgery. Ophthalmology is distinct from optometry; optometrists provide vision care and prescribe glasses but do not perform surgery.
Colon and Rectal Surgeons
These surgeons focus exclusively on the large intestine, rectum, and anus. They treat conditions like colorectal cancer, inflammatory bowel disease, diverticulitis, and hemorrhoids. Training requires completing a full general surgery residency plus one additional year of specialized colon and rectal surgery fellowship.
OB-GYN Surgeons
Obstetrician-gynecologists perform surgical procedures related to the female reproductive system, from cesarean sections to hysterectomies. Residency lasts four years. Those who subspecialize in gynecologic oncology complete an additional two to three years of fellowship training to surgically treat cancers of the uterus, ovaries, and cervix.
Pediatric Surgeons
Pediatric surgeons operate on infants, children, and adolescents. Their training adds two years of fellowship on top of a complete general surgery residency, making it a minimum of seven years after medical school. The conditions they handle are often dramatically different from adult surgery. These include congenital defects like abdominal wall abnormalities, diaphragmatic hernias, and intestinal malformations that are present at birth. They also treat childhood cancers such as Wilms tumor, neuroblastoma, and hepatoblastoma, along with conditions like Hirschsprung disease, where a section of the bowel lacks the nerve cells needed to function.
Oral and Maxillofacial Surgeons
These surgeons occupy a unique position in medicine. They hold a dental degree and complete a minimum of four additional years in a surgical training program. Their scope covers the jaw, face, and mouth, including wisdom tooth extractions, corrective jaw surgery, facial trauma reconstruction, and treatment of oral cancers. They are the only surgical specialists who begin with a dental rather than medical degree.
How Training Length Compares
All surgical residencies last at least five years after medical school, but the total commitment varies significantly by specialty. On the shorter end, ophthalmology requires four years of postgraduate training. General surgery, orthopedics, and urology each take five years. On the longer end, neurosurgery takes six years, and specialties that require general surgery residency plus a fellowship (like cardiothoracic, pediatric, or surgical oncology) can reach seven to eight years of postgraduate training. Surgeons who then subspecialize further through additional fellowships may train for a decade or more after earning their medical degree.
Once certified, surgeons must maintain their credentials through ongoing requirements. The American Board of Surgery requires a certification assessment every two years, continuing medical education credits tracked on a rolling five-year basis, an active and unrestricted medical license, and participation in a quality assessment or outcomes registry program.