A registrar is a doctor in advanced specialty training, sitting between junior doctors and fully qualified consultants in the medical hierarchy. The term is used primarily in the UK, Australia, and several other countries. If you’re familiar with the American system, a registrar is roughly equivalent to a senior resident or fellow. Registrars have completed their foundational medical training and are now building deep expertise in a chosen specialty, working with increasing independence while still technically under consultant supervision.
Where Registrars Fit in the Medical Hierarchy
In the UK system, the path from medical school to consultant follows a clear sequence. After graduating, doctors spend two years in foundation training (FY1 and FY2), rotating through different departments to build broad clinical experience. FY1 doctors hold only provisional registration with the General Medical Council, while FY2 doctors gain full registration.
After foundation years, doctors enter specialty training. Depending on the specialty, this takes one of two routes. Some specialties use “run-through” training, where a doctor applies once and progresses from ST1 all the way through to completion. Others use an “uncoupled” system, where doctors first complete two to three years of core training (CT1 to CT3) before applying separately for higher specialty training, which picks up at ST3 or ST4. It’s during these higher specialty training years that a doctor is commonly called a registrar.
The title signals something important to other staff in a hospital: this person has substantial clinical experience, can make complex decisions, and is often the most senior doctor physically present on the ward, especially during nights and weekends.
What a Registrar Actually Does
The registrar’s daily work varies hugely depending on the specialty, but a few responsibilities are consistent. In hospital medicine, the registrar typically leads the acute medical on-call, meaning they’re the go-to doctor when new patients arrive with serious or unclear conditions. They serve as the referring point for the entire hospital, fielding calls from other departments, advising junior doctors, managing the medical assessment unit, and making decisions about patient admissions and discharges.
In surgical specialties, registrars perform operations with varying levels of independence, progressing from assisting a consultant to leading procedures themselves as their training advances. In clinic settings, they see their own patients, order investigations, and develop treatment plans. They also teach and supervise junior doctors, a responsibility that grows as they become more senior.
One of the defining features of the registrar role is the balance between autonomy and oversight. A registrar is expected to handle most clinical situations independently, but a consultant is always available (at least by phone) for complex or high-risk decisions. As training progresses, the consultant steps further back, and the registrar takes on more responsibility, essentially rehearsing for the consultant role they’re working toward.
Exams and the Path to Consultant
Becoming a registrar isn’t just about accumulating years of experience. Doctors must pass demanding professional examinations along the way. Physicians typically need to pass the MRCP (Membership of the Royal Colleges of Physicians), while surgeons sit the MRCS (Membership of the Royal Colleges of Surgeons). These exams are usually required before or during the early stages of specialty training.
During higher specialty training, doctors in many medical specialties must also pass a Specialty Certificate Examination. These are compulsory for earning a Certificate of Completion of Training (CCT) and cover fields like acute medicine, dermatology, neurology, respiratory medicine, rheumatology, and others. Trainees are expected to have made at least one attempt by their penultimate year of training. The SCE tests knowledge beyond everyday practice, ensuring that specialists meet a nationally recognized standard.
Once all exams are passed and training requirements are fulfilled, the doctor receives their CCT. This certificate is the gateway to applying for consultant posts. In practice, the transition isn’t always immediate. Consultant positions can be competitive, and some newly qualified specialists take post-CCT fellowships to gain subspecialist skills, research experience, or service development credentials that strengthen their applications.
GP Registrars vs. Hospital Registrars
Not all registrars work in hospitals. Doctors training to become general practitioners also hold the registrar title during their specialty training years, but their experience looks quite different. A GP registrar works in a community practice under the supervision of an experienced GP, seeing patients with the full range of everyday health concerns rather than focusing on a single organ system or disease type.
The shift from hospital to general practice requires a genuine change in mindset. Hospital medicine emphasizes investigation and intervention, while general practice often relies on watchfulness, reassurance, and recognizing that time itself can be part of the treatment. GP registrars have described needing to “unlearn” the instinct to investigate everything and retrain themselves for a setting where managing uncertainty is a core skill. The supervisory relationship in general practice tends to be close and collaborative, with GP supervisors assessing not just clinical competence but also professionalism, safety, and the registrar’s ability to work independently in a community setting.
How the Term Translates Internationally
If you’re outside the UK, the terminology can be confusing. In the United States, the closest equivalent to a registrar is a senior resident or, in some cases, a fellow (a doctor doing subspecialty training after residency). In Australia, the term registrar is used in much the same way as in the UK, referring to a doctor in advanced specialty training. In some older systems, “Resident Medical Officer” was the general term for doctors in training, and “registrar” specifically denoted a more senior trainee with supervisory duties.
The UK has recently begun phasing in the term “resident doctor” to replace “junior doctor” as a broader label, which can add to the confusion for international readers. The key distinction remains: a registrar is not a beginner. They are a trained, experienced doctor in the later stages of specialization, typically with five or more years of postgraduate clinical work behind them.