A preliminary year (often called a “prelim year”) is a one-year residency position that provides foundational clinical training before a resident moves into a more specialized program. Unlike a categorical residency, which takes you from day one through board certification in a single specialty, a prelim year covers only the first year of graduate medical education. It exists because several specialties require a year of broad clinical experience before their specialized training begins at the PGY-2 level.
How a Prelim Year Differs From Categorical Residency
A categorical position offers the full course of residency training needed for board certification in a given specialty. If you match into a categorical internal medicine program, for example, you’re committed for all three years and the program is committed to you. A preliminary position, by contrast, offers only one to two years of training, generally completed before entering an advanced specialty program.
The key distinction is commitment length. When you finish a prelim year, your relationship with that program ends. You then move on to the advanced program where you matched separately, starting as a PGY-2. Specialties that commonly require a prelim year or its equivalent include anesthesiology, dermatology, neurology, ophthalmology, radiology, and radiation oncology. These fields need their residents to have core clinical skills but don’t offer that first-year training themselves.
Three Types of Preliminary Training
There are three flavors of preliminary year, and which one you pursue depends on where you’re headed afterward.
Preliminary medicine focuses heavily on internal medicine. A typical curriculum includes about three blocks (each roughly four weeks) of inpatient internal medicine, a block of ICU time, a block of night float, emergency medicine, family medicine, and ambulatory medicine rotations, plus four or more blocks of electives. This track is the better fit for residents heading into specialties with strong medicine foundations, like anesthesiology, neurology, or physical medicine and rehabilitation. It’s also a reasonable choice for students still weighing whether internal medicine itself might be their long-term career.
Preliminary surgery is structured around surgical rotations and is designed for residents who need operative and perioperative exposure before entering a surgical subspecialty at the PGY-2 level.
Transitional year (TY) programs are also classified as preliminary training, but they offer a broader mix of clinical disciplines. A transitional year typically includes two to three blocks of inpatient medicine alongside rotations in pediatrics, surgery, OB-GYN, or family medicine, depending on the program. Residents heading into specialties that value breadth over depth, like ophthalmology or radiology, often prefer transitional years. The ACGME, which accredits these programs, specifies that transitional years must include ambulatory care experiences across fields like family medicine, general internal medicine, general surgery, or pediatrics. Night float is capped at four continuous weeks and eight total weeks during the year.
What the Day-to-Day Looks Like
Prelim interns work hard. A time study of PGY-1 internal medicine residents found that the average workday runs about 12.5 hours. On a typical non-call day, interns manage around six patients, handle one new admission, and discharge about one and a half patients. The biggest chunk of the day, roughly 40%, is spent on the computer: entering orders, reviewing charts, writing notes. About 20% goes to discussing patients with the team (presenting on rounds, coordinating care by phone), and around 18% involves direct face-to-face time with patients.
Education gets squeezed. PGY-1 residents in one study averaged only about 12 minutes per day in scheduled conferences and 6 minutes of independent reading while at the hospital. Ward teams are typically structured with two interns, a senior resident (PGY-2 or PGY-3), an attending physician, and one or two medical students. Call schedules vary, but a common model has the “long call” team accepting all new admissions during an extended afternoon and evening shift every fourth day.
Whether you’re on a prelim medicine, prelim surgery, or transitional year track, you’re functioning as a full intern. You carry patients, write orders, respond to overnight pages on your call nights, and present cases on rounds. The clinical responsibility is identical to what categorical interns experience on the same rotations.
How Matching Works for Prelim Years
Applying to a prelim year adds a layer of complexity to the Match process. Many applicants are simultaneously applying to two separate programs: an advanced position in their target specialty (starting at PGY-2) and a preliminary or transitional year for their intern year. These are treated as independent matches. You rank your advanced programs on one list and your prelim or TY programs on another.
This means you could, in theory, match into an advanced dermatology spot in one city and a prelim medicine year in another, then relocate after intern year. It also means you could match one but not the other, which creates real uncertainty.
The application timeline follows the same ERAS schedule as all residency applications. For the 2026 cycle, applicants can begin submitting applications in early September 2025, programs start reviewing materials later that month, and the season runs through May 2026. Applicants targeting both a prelim year and an advanced position need to prepare two sets of rank lists and, often, attend two separate sets of interviews.
Pay and Benefits During a Prelim Year
Prelim year residents are paid on the same PGY-1 salary scale as categorical interns. At George Washington University, for instance, the PGY-1 salary for 2025 is about $72,745. Compensation varies by institution and region, but prelim interns receive the same salary and benefits package (health insurance, malpractice coverage, paid time off) as any other first-year resident at that hospital. There is no financial penalty for being in a preliminary track rather than a categorical one.
What Happens After the Prelim Year
If everything goes according to plan, you finish your prelim year, pack up, and start PGY-2 at the advanced program where you already matched. Your prelim year counts as your intern year, satisfying the clinical prerequisite your advanced specialty requires.
The riskier scenario is completing a prelim year without a secured PGY-2 position. This happens to applicants who didn’t match into an advanced spot and used the prelim year to strengthen their application for a second attempt. The outcomes are mixed. In one study of reapplicants to integrated plastic surgery, about 73% of those who did a prelim year eventually matched into some specialty, but only about 39% matched into their original target of plastic surgery. Research fellowships, by comparison, produced higher match rates into the desired specialty. The takeaway: a prelim year keeps you clinically active and earning a salary, but it doesn’t guarantee a stronger application the second time around, particularly in the most competitive specialties.
Residents who don’t match into their first-choice field after a prelim year sometimes pivot. In the plastic surgery study, those who ended up in other specialties most commonly landed in general surgery, followed by fields like anesthesiology, radiology, emergency medicine, and pathology.
Who Should Consider a Prelim Year
For many residents, a prelim year isn’t optional. If you’re going into a specialty that only offers advanced positions (ophthalmology and dermatology are common examples), you need a prelim year or transitional year to complete your intern training. It’s simply part of the path.
For applicants who didn’t match into their target specialty, a prelim year offers a way to stay in clinical medicine, build relationships with faculty who can write recommendation letters, and demonstrate competence while reapplying. But it’s worth weighing that choice carefully against alternatives like research fellowships, which in some fields produce better reapplication outcomes. The right choice depends on the specialty, your application weaknesses, and whether clinical experience or academic productivity will strengthen your candidacy more.