A clinical competency examination (CCX) is a performance-based test in which a trainee meets a trained actor playing a patient, takes a history, performs a physical examination, and then documents the encounter and explains the reasoning behind it. Unlike a multiple-choice paper, it measures what a candidate does rather than what a candidate knows. The label itself is not a national standard: particular medical schools use it, at least one commercial software product carries the name, and the wider profession more often says OSCE or CPX. In this guide you’ll learn what a CCX contains, how examiners score it, why the United States retired its national clinical skills exam in 2021, who still sits these exams today, and what recent research says about assessing clinical skills well.
What a clinical competency examination is
A CCX is built around a simulated clinical encounter. A candidate reads a short doorway instruction, walks into a room, and spends a fixed number of minutes with a standardized patient: a person trained to portray the same case, with the same answers and the same physical findings, for every candidate who comes through that door. The encounter is timed, and a bell ends it whether or not the candidate has finished.
What separates this format from an informal bedside quiz is the second half. After the encounter, the candidate sits at a computer and writes the note: what the patient said, what the examination showed, what the differential diagnosis is, and which investigations should come next. Southern Illinois University School of Medicine, which uses the term formally, describes its CCX as standardized patient encounters followed by computer-based documentation and clinical reasoning. That post-encounter component is where the exam stops testing bedside manner and starts testing thought.
Where the term comes from
CCX is a local label rather than a national one. At Southern Illinois University, CCX exams run at the middle and end of each unit in Year 1, at the end of each unit in Year 2, at the end of the pediatrics and psychiatry core rotations, and finally as a Summative Clinical Competency Examination (SCCX) in Year 3 once clinical rotations are complete. The acronym also belongs to a commercial assessment platform, DxR CCX, sold to medical, physician assistant and nursing programs. Neither usage makes CCX a term that appears on a licensing board’s website.
CCX, OSCE and CPX: sorting out the labels
Three labels describe overlapping things, and a reader who does not separate them will go in circles.
- OSCE (objective structured clinical examination) is the generic, internationally used name for a circuit of short, standardized stations. Research on this kind of exam almost always calls it an OSCE.
- CPX (clinical performance examination) is the label many United States medical schools attach to their longer summative standardized-patient exam. Stanford, among others, runs a CPX series.
- CCX (clinical competency examination) is the narrowest of the three: an institutional term, plus a software product name.
The practical consequence is that a student told to prepare for a CCX should ask which format the school actually means. Station length, the number of stations, and how much the written note is worth vary a great deal between institutions.
Other things CCX can stand for
Outside medical education the letters are noisy. CCX is a Koenigsegg sports car, a family of Poly desk telephones, a Minnesota television station, and a roofing supplier, and those meanings dominate general search results by a wide margin. Inside the biomedical literature the letters also turn up in chemokine receptor names such as CCX-CKR. CCX is not standard shorthand in a patient’s chart. A reader who has found these three letters in their own medical record has almost certainly found a different abbreviation.
What a clinical competency examination assesses
A well-designed clinical skills exam separates performance into domains and scores each one, rather than producing a single impressionistic verdict. The domains below recur across CCX, CPX and OSCE formats.
| Domain | What the examiner is looking for |
|---|---|
| History taking | Whether the candidate elicits the facts that actually discriminate between diagnoses, in a sensible order, without leading the patient. |
| Physical examination | Whether the right manoeuvres are chosen for the presenting problem, performed correctly, and performed gently. |
| Communication | Whether the candidate explains findings in plain language, checks understanding, and responds to what the patient is worried about. |
| Clinical reasoning | Whether the differential diagnosis fits the information gathered, and whether the proposed investigations would actually change the answer. |
| Documentation | Whether the post-encounter note is accurate, legible, complete, and free of findings that were never observed. |
| Professionalism | Hand hygiene, consent, draping, time management, and knowing when to ask for help rather than improvise. |
The elements a station tests are the same ones that fill a real chart. A history-taking station asks the candidate to elicit and organize a focused anamnesi della malattia attuale, and a longer case may add a targeted revisione dei sistemi. Physical examination stations ask for specific manoeuvres, from measuring an accurate blood pressure to eliciting a deep tendon reflex. Neurology and trauma scenarios often require the candidate to score a Scala del Coma di Glasgow, while a mental status case asks the candidate to document an valutazione dell'orientamento. Geriatric stations routinely ask the candidate to assess attività della vita quotidiana.
The written note is scored just as carefully. Examiners look for accurate shorthand, and a note earns credit for recording nessun disagio acuto only when the observation actually supports it. Order-writing exercises check whether a candidate knows when to issue an immediate medical order. Weighting shifts by station: a case about breaking bad news may allot most of its marks to communication and almost none to physical examination, and a cardiology case reverses that balance.
How a CCX station is run and scored
Checklists and global rating scales
Two scoring instruments usually run side by side. A checklist records discrete, observable actions: the candidate washed their hands, asked whether the chest pain radiated, checked for ankle swelling. Checklists are easy to score consistently and hard to argue with afterwards. A global rating scale asks the examiner or the standardized patient for an overall judgement instead, on a short numbered scale: was this candidate organized, empathetic, safe?
The two disagree more often than students expect. A candidate can tick nearly every box on a checklist and still be rated poorly overall, because the questions arrived as an interrogation rather than a conversation. Most programs treat that gap as informative rather than as a scoring error.
Why a single station proves very little
Performance in this format is strongly case-specific. Doing well with a chest pain case predicts surprisingly little about doing well with an abdominal pain case. This is the most important technical fact about clinical skills exams, and it explains why they use circuits of many short stations rather than one long case. Reliability comes from sampling widely, across more stations, examiners and patient problems, not from making any single station longer or sterner.
Standard setting, the process that decides where the pass mark falls, is a separate exercise again. Some programs require a minimum score at every station. Others allow a strong performance in one to offset a weak one and set a single cumulative bar.
The end of Step 2 CS and what replaced it
For roughly sixteen years the United States had a national clinical skills exam. It no longer does, and that is the change that reshaped this whole landscape.
| Date | What happened |
|---|---|
| 2004 | Step 2 Clinical Skills (Step 2 CS) is introduced, becoming the only national clinical skills test required for United States licensure. |
| May 2020 | The USMLE program suspends Step 2 CS because of the COVID-19 pandemic, and states an intention to relaunch a modified exam within 12 to 18 months. |
| 26 January 2021 | The FSMB and NBME announce that work to relaunch Step 2 CS has been discontinued, with no plans to bring it back. ECFMG announces expanded Pathways for international medical graduates the same day. |
| 2021 onward | Clinical reasoning and communication continue to be sampled elsewhere in the USMLE sequence, through computer-based case simulations in Step 3 and communication content in Step 1. Neither is a replacement. |
| 2021 onward | Responsibility for assessing clinical skills returns to medical schools, prompting regional consortia such as the Florida Clinical Skills Collaborative and the long-running California Consortium for the Assessment of Clinical Competence. |
What this changed for medical schools
Responsibility for certifying clinical skills fell back to individual schools, without a national benchmark to calibrate against. Schools responded by pooling effort. In February 2021, representatives of all ten allopathic and osteopathic medical schools in Florida formed a clinical skills collaborative for precisely this reason. The California Consortium for the Assessment of Clinical Competence, which predates the change by decades, became a model that others studied.
Assessment thinking also shifted toward entrustable professional activities: concrete units of work, such as obtaining informed consent or handing a patient over at the end of a shift, that faculty either trust a trainee to perform unsupervised or do not. That reframing asks a different question from a station score. It asks what this particular person can safely be left to do.
What changed for international medical graduates
Before the suspension, international medical graduates had to pass Step 2 CS to satisfy the clinical and communication skills requirement for ECFMG certification. On the same day the discontinuation was announced, ECFMG announced an expansion of its Pathways, a set of alternative routes by which qualified international graduates can meet that requirement and go on to United States graduate medical education. The criteria have been revised repeatedly since. Anyone relying on them should read the current year’s requirements directly rather than any summary.
Who sits a clinical competency examination today
The audience for this term is narrower than the medical dictionary that surrounds it. Four groups meet a CCX or its equivalents: medical students at institutions that use the label, whose progression depends on passing; osteopathic students, whose COMLEX Level 2-PE was discontinued alongside Step 2 CS; international medical graduates working through ECFMG requirements; and nursing, physician assistant and pharmacy trainees, whose programs run comparable standardized-patient assessments under their own names.
Patients do not encounter this term. They encounter its product instead: a clinician who was taught to explain a finding clearly because somebody once scored them on whether they did.
How trainees prepare for a clinical skills exam
Preparing for a performance exam looks different from preparing for a knowledge exam, and the most common mistake is treating the two the same way.
- Practise out loud with another person. Reading a history-taking framework silently does not build the skill the exam measures.
- Rehearse the post-encounter note under time pressure, not just the encounter. Candidates who run out of minutes usually lose them at the keyboard.
- Build one opening and one closing that work anywhere. A reliable introduction and a reliable summary free up attention for the part of the case that is genuinely unfamiliar.
- Ask for specific feedback rather than a score. The research summarized below is unusually clear about what separates useful feedback from noise.
- Sample broadly across presenting complaints instead of deepening a favourite case. Because performance is case-specific, breadth is what protects a result.
Ultimi progressi scientifici
Research on assessing clinical skills has been busy since the national exam disappeared. Four recent findings deserve attention.
Schools are pooling their exams into regional consortia
A 2022 report in Cureus described how all ten of Florida’s allopathic and osteopathic medical schools built a shared clinical skills collaboration after Step 2 CS and the osteopathic COMLEX Level 2-PE were discontinued. Surveying its own members, the study found that the most commonly cited reason for joining was a desire to establish a shared assessment in place of the lost national exams, and that members ranked running a joint assessment pilot as their highest priority for the year ahead.
What this means for you: the clinical skills exam you sit is increasingly likely to be designed and standardized beyond your own faculty. If your school belongs to a consortium, the bar you are measured against is being set by a group of institutions rather than by local habit, which usually makes it steadier from year to year.
An aside on the jargon: a consortium here just means a group of schools that pool cases, examiners and scoring data instead of each building an exam alone.
Good feedback is specific, balanced, and names the gap
A 2023 systematic review in MedEdPublish examined fourteen studies to work out what actually makes written feedback after a clinical skills station useful. Ten candidate qualities were tested. Only a few held up when independent reviewers tried to apply them: feedback should be specific, should describe the gap in the learner’s performance, should be balanced, and should be constructive and behavioural. The remaining qualities that circulate in the literature showed poor agreement between reviewers, which suggests they do not work as standards.
What this means for you: if the comment you get back after a station reads “good effort, work on your history”, you have received nothing you can act on. Asking an examiner for feedback that names a specific behaviour and the gap it left is not asking for a favour. It is asking for what the evidence identifies as the working definition of quality feedback.
An aside on the jargon: the reviewers measured agreement with a kappa coefficient, a number showing how often independent raters agree beyond what chance alone would produce. “Specific” scored about 0.79, which is strong agreement. Most of the other qualities scored below 0.22, which is close to noise.
Practising with an AI patient improved interview scores, modestly
A 2024 controlled trial in JMIR Medical Education gave 35 fourth-year medical students in Japan a large language model simulating a patient to practise medical interviews with, and compared them against 110 students from the previous year who had no such tool. The group that practised with the AI scored higher on the medical interview component of the national pre-clerkship OSCE. The difference was real but small, roughly one point on the scale used, and the authors were explicit that the platform did little for nonverbal communication and should supplement traditional simulation rather than replace it.
What this means for you: rehearsing questions with a chatbot patient can plausibly sharpen the verbal half of an interview, and it is available at two in the morning when a classmate is not. It will not teach you where to put your hands, when to stop talking, or how to sit with someone who has just started crying. Those are still learned with people.
An aside on the jargon: this was a nonrandomized controlled trial, meaning students were not assigned to the two groups by chance. That design cannot rule out the possibility that the year-groups differed to begin with, so the result points in a direction rather than settling the question.
AI is entering assessment faster than the evidence about it
A 2025 scoping review in BMC Medical Education screened more than 3,200 publications and included 310 on artificial intelligence in undergraduate medical education. It found the field expanding very quickly, with applications reaching clinical assessment, procedural skills evaluation and automated grading. It also found something more sobering: not one included publication assessed what AI does to students’ clinical reasoning or critical thinking, and there is neither a standardized approach for integrating these tools nor a consensus on AI competencies or ethical frameworks.
What this means for you: tools that score or coach your clinical skills are arriving in medical schools ahead of the evidence that they help you think better. Being told to use one is not the same as that tool having been validated, and it is entirely fair to ask what a given system was tested on.
An aside on the jargon: a scoping review maps how much research exists on a question and what it covers. It is a survey of the terrain, not a verdict on whether the thing works.
Glossario
| Termine | Definizione |
|---|---|
| Clinical competency examination (CCX) | A performance-based exam using standardized patients, followed by written documentation and clinical reasoning. The name is used by particular institutions and by a software product, not by national licensing bodies. |
| Objective structured clinical examination (OSCE) | The generic name for a circuit of short, standardized clinical stations. This is the term used in almost all published research on the format. |
| Clinical performance examination (CPX) | The label many United States medical schools use for their longer summative standardized-patient examination. |
| Paziente standardizzato (SP) | A person trained to portray the same case identically for every candidate, so that everyone is tested against the same encounter. |
| Post-encounter note | The written record a candidate produces after leaving the room, setting out findings, a differential diagnosis, and a plan. It is scored. |
| Checklist | A scoring sheet of discrete, observable actions that an examiner marks as done or not done. |
| Global rating scale | An examiner’s overall judgement of a performance on a short numbered scale, used alongside a checklist. |
| Standard setting | The formal process that decides where a pass mark falls. It is a judgement made by a panel, not a fact discovered in the data. |
| Entrustable professional activity (EPA) | A concrete unit of clinical work that faculty either trust a trainee to perform unsupervised or do not. An alternative to scoring skills in isolation. |
| Step 2 CS | The United States Medical Licensing Examination’s national clinical skills exam, suspended in May 2020 and permanently discontinued in January 2021. |
Domande frequenti
Is a CCX the same thing as an OSCE?
They overlap, but they are not synonyms. OSCE is the generic name for a circuit of short standardized stations and is the term used in the research literature. CCX is an institutional label for a particular design that pairs a standardized patient encounter with a computer-based post-encounter note testing documentation and clinical reasoning. A CCX is a kind of standardized-patient examination; whether your school’s version looks like a classic OSCE circuit depends entirely on how that school built it. Ask for the format, not the acronym.
Does the CCX still exist now that Step 2 CS is gone?
Yes. The two were never the same thing. Step 2 CS was a national licensing exam run by the USMLE program and was permanently discontinued in January 2021. A CCX is a school-run assessment, and schools that used the format before 2021 have generally kept it. If anything, the disappearance of the national exam made institutional clinical skills assessments more consequential, because there is no longer a national benchmark sitting behind them.
What happens if a trainee fails a clinical competency examination?
Policies are set by each program, so there is no single answer. Commonly, a failed station or a failed overall attempt triggers a remediation plan: targeted practice, supervised feedback sessions, and a reassessment. Some programs require a minimum score at each station; others allow strong stations to offset weak ones against a cumulative pass mark. Progression to the next stage of training is often contingent on passing. The specifics live in your program’s assessment handbook.
How long is a CCX station?
It varies by institution and by purpose. Short OSCE-style stations commonly run somewhere between five and fifteen minutes for the encounter itself, with additional time allotted for the written note afterwards. Summative examinations tend to use longer, more integrated cases. Because the timing is fixed and enforced, rehearsing under the actual clock matters more than most candidates expect, particularly for the documentation half.
Do real patients take part in a CCX?
Usually not. The point of a standardized patient is standardization: a trained person portrays the same case with the same answers and the same findings for every candidate, so that scores compare like with like. Some programs also use volunteer patients with genuine stable physical findings for examination-focused stations, and some use manikins or simulators for procedures. Where real people are involved, programs obtain consent and protect privacy.
Do international medical graduates still need a clinical skills exam?
Not in the form of Step 2 CS, which no longer exists. Before its suspension, international medical graduates had to pass it to satisfy the clinical and communication skills requirement for ECFMG certification. ECFMG now offers Pathways, a set of alternative routes to meeting that requirement. The criteria have changed more than once since 2021, so check the requirements for the current match year on ECFMG’s own site rather than relying on secondhand summaries.
Fonti
- Federation of State Medical Boards and NBME — Work to relaunch USMLE Step 2 CS discontinued — USMLE announcement, 2021 — https://www.usmle.org/work-relaunch-usmle-step-2-cs-discontinued
- ECFMG — USMLE Program Discontinues Step 2 CS — ECFMG News, 2021 — https://www.ecfmg.org/news/2021/01/26/usmle-program-discontinues-step-2-cs/
- Southern Illinois University School of Medicine — CCX Assessments, Office of Educational Curriculum — https://www.siumed.edu/oec/ccx-assessments
- Toonkel R, Castiglioni A, Danforth D, et al. — The Florida Clinical Skills Collaborative: A New Regional Consortium for the Assessment of Clinical Skills — Cureus, 2022 — https://doi.org/10.7759/cureus.31263
- Alsahafi A, Ling DLX, Newell M, Kropmans T — A systematic review of effective quality feedback measurement tools used in clinical skills assessment — MedEdPublish, 2023 — https://pmc.ncbi.nlm.nih.gov/articles/PMC10331851/
- Yamamoto A, Koda M, Ogawa H, et al. — Enhancing Medical Interview Skills Through AI-Simulated Patient Interactions: Nonrandomized Controlled Trial — JMIR Medical Education, 2024 — https://mededu.jmir.org/2024/1/e58753
- Simoni J, Urtubia-Fernandez J, Mengual E, et al. — Artificial intelligence in undergraduate medical education: an updated scoping review — BMC Medical Education, 2025 — https://bmcmededuc.biomedcentral.com/articles/10.1186/s12909-025-08188-2
Approfondimenti
- Significato di HPI: Guida alla storia della malattia attuale
- Significato di ROS: Revisione della Guida ai Sistemi
- Significato GCS: Guida alla scala del coma di Glasgow
- DTR Significato: Guida al riflesso tendineo profondo
- Significato di ADL: guida alle attività della vita quotidiana
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