Most medical fellowships last 1 to 3 years, depending on the specialty. Some highly specialized surgical fellowships can stretch longer, but the majority fall within that range. Fellowship comes after residency, so it represents the final stage of a doctor’s formal training before fully independent practice.
How Fellowship Fits Into the Full Training Timeline
A fellowship is subspecialty training that follows residency. To put it in context: a doctor completes 4 years of medical school, then 3 to 7 years of residency (depending on the field), and then 1 to 3 years of fellowship. A cardiologist, for example, finishes 3 years of internal medicine residency and then enters a 3-year cardiology fellowship. That’s a minimum of 10 years of training after college before practicing independently as a cardiologist.
Not every doctor does a fellowship. Fellowship is optional and pursued only by those who want to specialize further within their field. A general internist or family medicine physician, for instance, can practice right after residency. But someone who wants to focus on a niche area, like transplant surgery or interventional pulmonology, needs the additional fellowship training.
Common Fellowship Lengths by Specialty
The duration varies significantly based on the complexity of the subspecialty and the skills involved. Here’s how some of the most common fellowships break down:
- 1-year fellowships: Geriatric medicine, sports medicine, hospice and palliative medicine, sleep medicine, surgical critical care, surgery of the hand, hospital medicine
- 2-year fellowships: Adolescent medicine, adult congenital heart disease, pediatric urology, complex general surgical oncology, neuroradiology
- 3-year fellowships: Cardiology, gastroenterology, pulmonary and critical care, hematology/oncology, gynecologic oncology
Pediatric surgery is a 2-year fellowship. The first year typically splits time between neonatal and pediatric intensive care units alongside pediatric surgery rotations, while the second year is spent entirely in pediatric surgery.
Sub-Subspecialty Fellowships Add More Time
Some doctors pursue an additional fellowship after their first one, narrowing their expertise even further. These are sometimes called advanced or sub-subspecialty fellowships, and they typically last 1 year. A cardiologist who completes a 3-year general cardiology fellowship might then do a 1-year fellowship in interventional cardiology, echocardiography, or heart failure and transplant. A gastroenterologist might add a year of advanced endoscopy or inflammatory bowel disease training.
Mayo Clinic alone lists over 30 of these 1-year advanced fellowships across internal medicine subspecialties, covering areas as specific as amyloid cardiology, esophageal diseases, pulmonary hypertension, and onco-nephrology. These extra years are voluntary, but they’re increasingly common in competitive academic medicine.
Research Can Extend the Timeline
Many fellowship programs include a research component built into the standard training period. In a 3-year cardiology fellowship, for example, one of those years is often dedicated primarily to research. Some fellows choose to extend their training further to pursue a master’s degree or complete additional research projects. At the University of Michigan, an academic medicine fellowship is structured as 12 months but has been extended to 2 years for fellows simultaneously completing a graduate degree.
Research-heavy fellowship tracks at academic medical centers can add 1 to 2 years beyond the clinical minimum. This is more common among physicians planning careers in academic medicine, where a publication record and research training are essential for faculty positions.
Combined Programs Can Save Time
The ACGME, the organization that accredits graduate medical training in the United States, began formally accrediting combined residency-fellowship programs in 2024. These programs merge training in two specialties or a specialty and subspecialty into a single, streamlined track. Examples include emergency medicine combined with critical care, internal medicine combined with psychiatry, and pediatrics combined with child and adolescent psychiatry.
The appeal is efficiency. Instead of completing a full residency and then a separate fellowship, trainees move through an integrated curriculum that covers both. While the ACGME hasn’t published standardized time savings for each combination, the goal is to reduce redundant training while maintaining the same competency standards.
What Fellows Earn During Training
Fellows are paid, but their salaries are modest relative to what they’ll earn as attending physicians. Pay is based on post-graduate year (PGY) level, which counts every year since medical school graduation. A doctor entering fellowship after a 3-year residency would be at PGY-4 or higher.
At Northwestern’s McGaw Medical Center, 2026-2027 stipends range from about $78,500 for PGY-1 (first-year residents) to roughly $99,300 for PGY-7 and above. A typical fellow at PGY-4 through PGY-6 earns between $89,000 and $95,600. Fellows at Northwestern also receive an $11,000 annual academic stipend on top of base salary. These figures are representative of large academic medical centers, though pay varies by institution and region.
For context, the average starting salary for a physician finishing fellowship and entering independent practice is several times higher, often $250,000 to $400,000 or more depending on the specialty. Each additional year of fellowship means another year at trainee wages, which is a real financial consideration, particularly for doctors carrying medical school debt.
The Longest Training Paths in Medicine
The longest total training timelines belong to subspecialists who build on already-lengthy residencies. Neurosurgery residency alone is 7 years. A neurosurgeon who then pursues a fellowship in pediatric neurosurgery or spine surgery adds 1 to 2 more years, bringing the total post-medical school training to 8 or 9 years, and 12 to 13 years after starting college.
Cardiothoracic surgery follows a similar path: 5 years of general surgery residency, then a 2 to 3 year cardiothoracic fellowship. Congenital cardiac surgery requires an additional 2 years of training beyond that. Plastic surgery residency runs 6 years on its own, with optional fellowships in hand surgery, craniofacial surgery, or microsurgery adding another year.
On the shorter end, a family medicine physician who completes a 1-year geriatric medicine or sports medicine fellowship finishes all training in just 4 years after medical school. The range across medicine, from shortest to longest fellowship-inclusive paths, spans roughly 4 to 10 years of post-medical school training.