The Gastroenterology SSG expects endoscopy evidence equivalent to JAG certification. For colonoscopy that means a caecal intubation rate above 90% with validated procedure numbers; for upper GI, demonstrated competency via DOPS over approximately 200 cases. Log in JETS, export your KPI data, and pair it with reflective practice to create evidence that is self-explanatory to assessors.
Why endoscopy decides gastroenterology applications
The GMC Gastroenterology with General Internal Medicine Specialty Specific Guidance (SSG) is built around a set of Capabilities in Practice (CiPs). Several of those CiPs - including managing patients with gastrointestinal conditions requiring endoscopic intervention - are directly tied to procedural evidence. This is different from most physician specialties, where evidence is largely composed of clinical assessments, case reports, reflections, and structured reports from referees.
In gastroenterology, a Portfolio Pathway application without credible endoscopy evidence faces an almost certain request for further evidence or a deferral. We have seen applications from senior, experienced gastroenterologists stall precisely because the endoscopy section of their portfolio was thin, inconsistently documented, or presented without the quality data that assessors look for. The clinical competence is rarely in question. The portfolio packaging is.
This article is a companion to the Gastroenterology Portfolio Pathway complete guide. It focuses specifically on the endoscopy logbook: what to include, what format assessors expect, and how to fill gaps where they exist.
JAG publishes its colonoscopy and upper GI certification thresholds on the JAG website, and these numbers inform what Portfolio Pathway assessors consider adequate. Check the current JAG certification competencies before building your evidence strategy - they are updated periodically and the figures in this article reflect guidance current as of June 2026.
What the GMC SSG actually says
The GMC Specialty Specific Guidance for Gastroenterology is derived from the JRCPTB Gastroenterology and General Internal Medicine curriculum, which was updated in 2022. The curriculum defines gastroenterological procedures as a high-stakes CiP group and specifies that evidence should demonstrate both the volume and quality of endoscopic practice, drawing on the JETS portfolio as the primary source.
The SSG notes that endoscopy evidence should include:
- Logbook evidence of independent practice in upper gastrointestinal endoscopy and colonoscopy
- Quality performance indicators sourced from JETS or equivalent validated systems
- Direct Observation of Procedural Skills (DOPS) assessments for endoscopic procedures, completed by a suitably qualified senior colleague
- JAG certification or a structured demonstration of equivalent competence where JAG certification is not available
- Evidence of independent decision-making: consent, indication, risk discussion, and post-procedure management
The phrase "equivalent competence" in the SSG is important and frequently misread. It does not mean "any logbook from any system." It means evidence that maps against the JAG competency framework at the level JAG certification would demonstrate. If you are not JAG-certified, you carry the burden of showing, procedurally and statistically, that you are at the same level as someone who is.
Most substantive gastroenterology consultant posts are dual gastroenterology and General Internal Medicine (GIM). That means your Portfolio Pathway application will also need to satisfy the GIM capabilities - including the acute take and acute medicine evidence. This article focuses on the endoscopy element. The GIM requirements are covered separately in the gastroenterology overview and the GIM guide.
JAG certification and the JETS portfolio
The Joint Advisory Group on GI Endoscopy (JAG) is the body responsible for quality and training standards in endoscopy across the UK. It sits within the Royal College of Physicians and sets the competency framework against which all endoscopy training and certification is measured. JAG certification is the gold standard evidence of endoscopic competence for both trainees and non-training grade doctors.
The JAG Endoscopy Training System (JETS) is the NHS platform for logging procedures, completing DOPS assessments, and tracking progress against JAG certification thresholds. JETS generates the quality data - caecal intubation rates, adenoma detection rates, procedure completion, complication logging - that assessors use to evaluate competence. It is not a new platform: JETS has been the standard NHS endoscopy logbook for over a decade, and any gastroenterologist working in an NHS Trust should be logging there.
If you are not currently logging in JETS, this is the single most impactful thing you can do for your Portfolio Pathway application before anything else. Contact your Trust's endoscopy lead or JAG link assessor. Access can usually be arranged within days.
How JAG certification works for senior doctors
JAG certification is typically associated with trainees completing the gastroenterology or surgical curriculum. However, it is also available to non-training grade doctors - Specialty Doctors, Specialist Grade, Locum Consultants - who can demonstrate the required competency thresholds. The process involves a JAG assessor reviewing your JETS data and, where required, completing a direct assessment. Check the JAG website for the current non-training grade pathway and contact your local Endoscopy Training Centre if you are considering this route.
Holding JAG certification before submitting your Portfolio Pathway application removes a significant source of assessor uncertainty. It is not the only path, but it is the cleanest one.
Procedure numbers: the three core modalities
The gastroenterology SSG and the JETS framework distinguish between core endoscopy modalities (those expected of any gastroenterologist) and advanced or subspecialty modalities (those required only in specific practice patterns). The core modalities are upper GI endoscopy (OGD - oesophago-gastro-duodenoscopy), colonoscopy, and flexible sigmoidoscopy.
| Procedure | JAG certification threshold | Key performance indicator | Type |
|---|---|---|---|
|
Upper GI endoscopy (OGD)
Oesophagus, stomach, duodenum
|
~200 procedures Competency-based via DOPS |
Completion rate, lesion detection, Barrett's surveillance quality | Core |
|
Colonoscopy
Full colonoscopy to caecum
|
~300 procedures CIR above 90% |
Caecal intubation rate (CIR), adenoma detection rate (ADR), withdrawal time, complication rate | Core |
|
Flexible sigmoidoscopy
Sigmoid colon and rectum
|
~150 procedures Completion rate standard |
Completion rate, polyp detection | Supporting |
|
ERCP
Endoscopic retrograde cholangiopancreatography
|
Separate JAG certification pathway | Deep cannulation rate, complication rate, radiation dose | Advanced |
|
Endoscopic ultrasound (EUS)
Diagnostic and interventional
|
Subspecialty pathway - not required for core certification | Diagnostic accuracy, FNA yield where applicable | Advanced |
The procedure counts above are indicative thresholds associated with JAG certification, not Portfolio Pathway-specific requirements. The GMC does not set its own number. What it does require is evidence of competence at the standard JAG certification would demonstrate. A candidate with 350 colonoscopies logged in JETS, a CIR consistently above 90%, ADR in the expected range, and DOPS signed off at independent level is straightforwardly demonstrating that standard. A candidate with 150 colonoscopies and no KPI data is not.
If your procedure numbers are close to but not yet at JAG certification thresholds, address this before applying. A post that gives you access to lists is more valuable in this period than a post that restricts endoscopy. The what a PP-supportive Trust looks like article covers how to assess this when considering a move.
Quality indicators: the numbers inside the numbers
Volume is necessary but not sufficient. A high procedure count with poor quality indicators is evidence of high-volume poor practice, not competence. Assessors know this and look at your quality indicators alongside your numbers. JAG publishes explicit benchmarks, and your personal KPIs should be presented against those benchmarks with a reflection on any variation.
The dashboard above illustrates the format. Your JETS data exports contain exactly these figures. The task for Portfolio Pathway submission is not to generate new numbers - it is to extract what is already in JETS, present it clearly, and write a short reflection on what the data shows about your practice. Where a KPI is below benchmark, acknowledge it honestly, explain the context if relevant (for example, a high proportion of incomplete procedures attributable to poor bowel preparation and documented as such), and show how you have sought to improve it.
Assessors give credit for honest self-awareness. A candidate who presents 94% CIR with a brief reflection saying "my CIR dropped to 87% in the six months after transferring to a new Trust; I worked with the endoscopy trainer to review technique and it has since recovered to above 90%" is demonstrating exactly the reflective quality the GMC's Good Medical Practice 2024 framework expects.
ADR and the case mix problem
Adenoma detection rate is a colonoscopy quality indicator, but it is sensitive to case mix. A practitioner doing primarily inflammatory bowel disease surveillance in a younger population will naturally have a lower ADR than one doing bowel cancer screening in a 60-70 age group. If your ADR appears low because of case mix, explain this in your reflection and present your number alongside the actual JAG benchmark for your case mix where possible. The National Endoscopy Database (NED) produces national benchmarks stratified by indication. A reference to NED data in your reflection shows methodological awareness.
DOPS for endoscopy: how to use them
Direct Observation of Procedural Skills (DOPS) is the standard workplace-based assessment tool for procedural evidence in the Portfolio Pathway context. The general framework is covered in the workplace-based assessments article. Endoscopy DOPS have specific variants within JETS - the JAG DOPS for OGD, colonoscopy, and flexible sigmoidoscopy - that are more procedure-specific than the generic Royal College DOPS forms.
For Portfolio Pathway purposes:
- JAG DOPS completed within JETS are the strongest form of endoscopy procedural assessment. They are signed by an assessor with an identified relationship to the platform, they timestamp the procedure, and they feed into your JAG certification progress data.
- Generic Royal College DOPS forms completed on paper by a senior colleague are weaker but can still count, particularly if they are recent, signed by a named consultant with a clear relationship to the procedure performed, and paired with your JETS logbook data for the same period.
- Aim for at least two DOPS per core modality per year of your portfolio window. More is better. A portfolio with two DOPS for 300 colonoscopies looks sparse; one with six DOPS across the same volume, covering early lists, complex cases, and teaching cases, looks like a supervised practitioner who engaged actively with feedback.
The reflection attached to each DOPS matters. A DOPS with a one-line reflection ("good procedure, nothing to add") is wasted evidence. A DOPS with a paragraph identifying what was technically challenging, what the assessor's specific feedback was, and what you changed as a result is the kind of procedural reflection the GMC's framework expects. Link your DOPS reflections to the CiPs they demonstrate, particularly the procedure-specific CiPs in the gastroenterology curriculum.
Book DOPS assessments for cases that are likely to show your range - a complex therapeutic procedure, a case requiring sedation adjustment, a technically difficult colonoscopy in a patient with previous abdominal surgery. Routine uncomplicated cases produce useful volume data but less distinctive DOPS evidence. Your assessor can only assess what they observe.
Building your endoscopy evidence package
The evidence package for endoscopy should be a self-contained section of your portfolio, clearly indexed, that takes an assessor from "what procedures does this applicant do?" to "do they do them well and do they reflect meaningfully on their practice?" in under ten minutes. That is a practical target, not a principle. Assessors review many portfolios. Dense, unstructured logbook data does not achieve it.
Exporting your JETS data
JETS allows you to export a complete procedure log in PDF format from the procedure log section of your dashboard. You should export the full log rather than a filtered summary - assessors can see what a filter might be hiding. The export includes dates, procedure type, completion status, sedation used, and the assessor relationship for any directly observed procedures.
Separately, the KPI reports section of JETS generates your personal performance data against JAG benchmarks. Export the most recent 12-month period and the full summary since you began logging. Include both: recent data shows current performance; historical data shows your trajectory.
Export your complete JETS procedure log
Log in to JETS, navigate to your procedure log, and export as PDF. Include all procedures, not just completed ones. Date-stamp the export so assessors know it is current.
Export your KPI report
From the JETS dashboard, generate your personal KPI report. Download the 12-month view and the all-time summary. Present both in your portfolio.
Compile your DOPS forms
Gather the JAG DOPS from JETS and any paper DOPS completed outside the platform. Order them chronologically and attach the reflection for each.
Write the endoscopy summary reflection
Write a single structured reflection (not a list of procedures, not a CV summary) that discusses your current scope, your quality trajectory, how you handle complications and adverse events, and how your endoscopy practice maps to the relevant gastroenterology CiPs.
Add the endorsement letter or JAG certificate
If JAG-certified, attach the certificate. If not yet certified, ask your endoscopy lead or a senior JAG-qualified colleague to write a brief endorsement letter confirming your competency level, referencing your JETS data and their direct observation of your practice.
Cross-reference with your audit evidence
If you have completed an endoscopy-related audit or quality improvement project, reference it here. A QI project that improved your department's bowel prep rates, or an audit against BSG IBD surveillance guidelines, directly reinforces your procedural evidence.
Overseas endoscopy evidence: what to expect
Doctors who have performed the majority of their endoscopy outside the UK, or outside the JAG system, face an additional evidential burden. This is not a barrier - it is a higher standard of translation. The assessors need to be confident that your overseas endoscopy practice is genuinely comparable to JAG-certified UK practice. Without a framework to anchor that comparison, a logbook alone does not establish it.
Starting position
- JETS logbook with verified KPI data
- CIR and ADR mapped against JAG benchmarks
- DOPS completed by named UK assessors
- JAG certificate as evidence anchor
- Endoscopy lead familiar with JAG process
Additional evidence needed
- Translated logbook with equivalent KPI data extracted
- Mapping document: overseas system vs JAG framework
- UK DOPS from any current UK practice, however recent
- Letter from a JAG-qualified senior confirming equivalent level
- Evidence of case mix comparability to UK practice
If you have been practising in the UK for any period, even in a post that restricts endoscopy, you should obtain UK DOPS now. A single direct observation of your OGD technique by a JAG-qualified consultant, even in a training capacity, is worth more to an assessor than a foreign logbook of 500 procedures without any UK-based assessment.
The honest picture for doctors applying directly from overseas is that the endoscopy evidence gap is one of the most significant challenges in gastroenterology Portfolio Pathway applications. This is covered more broadly in the internationally-trained doctors and the UK Portfolio Pathway article. For most applicants in this position, taking a UK post before applying - even a locum or specialist grade post with endoscopy lists - is the practical route to building an evidence base that satisfies the SSG.
Some endoscopy systems overseas use different quality metrics, different sedation practices, different scope technology, and different complication reporting frameworks. Assessors are aware of this. A raw procedure count from a system with no KPI equivalent is not the same as JETS data. Do not present it as equivalent. Present it as contextual evidence, explain the system, and build current UK evidence wherever possible to supplement it.
ERCP, EUS and advanced endoscopy
Endoscopic retrograde cholangiopancreatography (ERCP) and endoscopic ultrasound (EUS) are advanced modalities. They are not required for the core gastroenterology Portfolio Pathway application - they are expected only if your proposed scope of practice includes them. A gastroenterologist who has never performed ERCP in an NHS post should not include it in their portfolio, because a post they are applying for may well not require it. Listing ERCP as a claimed competency that the assessors cannot verify from the rest of the portfolio creates questions rather than answers them.
If you do perform ERCP or EUS, include the evidence clearly but separately labelled as advanced endoscopy. For ERCP: deep cannulation rate, procedure completion, complication rate (particularly post-ERCP pancreatitis), radiation dose, and any JAG ERCP certification. For EUS: case volume by indication (diagnostic, FNA, therapeutic), diagnostic accuracy where available, and DOPS or equivalent assessments from a trained EUS supervisor.
These modalities strengthen an application when they are relevant to the proposed scope. They are not a substitute for strong core procedure evidence. An assessor reading a portfolio with excellent ERCP data but weak colonoscopy numbers will note the gap, not be distracted from it.
Common submission mistakes
The most frequent errors in endoscopy evidence sections fall into recognisable patterns. Understanding them in advance saves significant time and avoids the deferral-and-resubmit cycle.
Submitting a logbook without KPI data
A list of procedures with no quality indicators is a count, not evidence of competence. Assessors cannot determine CIR, ADR, or complication rates from a list of dates and procedure types. Always include your KPI export from JETS alongside the procedure log.
Using only paper DOPS without linking to logbook
Paper DOPS submitted without the logbook context are harder to evaluate. The assessor cannot see whether the DOPS represents your 20th or 200th colonoscopy. Link every DOPS explicitly to the JETS period it covers and place it in the chronological context of your logbook.
Presenting overseas evidence without a mapping document
A logbook from a non-UK system presented without explanation creates uncertainty. A one-page mapping document explaining the endoscopy system used, how quality was measured, and how the data maps to JAG standards dramatically improves readability. This document does not need to be long - two or three paragraphs and a table is sufficient.
Omitting the reflective summary
The reflective practice article explains why reflection matters. In the endoscopy context, the risk of omitting a reflection is that the logbook looks like a procedural transaction record rather than a demonstration of professional practice. The reflection is where you show that you think about the quality of what you do, that you understand why CIR matters to bowel cancer outcomes, and that you know what to do when a procedure goes wrong.
Evidence that is too old
The five-year rule article explains the GMC's currency of evidence policy. Endoscopy evidence from more than five years ago carries less weight unless supplemented with recent data. If the bulk of your logbook is old, the priority is building current JETS entries, not polishing the historical record.
Waiting until JAG certification is complete before applying
JAG certification is not a prerequisite for Portfolio Pathway application. You can apply with a clear plan to achieve certification during or immediately after the application window, provided your current evidence demonstrates competence at that level. What you cannot do is rely on a vague future intention. Be specific: "I have applied for JAG certification; my JETS data shows CIR 91.2% and ADR 17%; the certification panel is scheduled for September 2026."
If certification is in progress, the evidence package needs to be compelling on its own terms. A pending certification that does not come through leaves a gap in the application. Assess your readiness honestly before opening your GMC Online window - the 24-month clock starts whether you are ready or not. The GMC Online application walkthrough explains what happens once you open the window.
All 18 specialisms
This article is part of the gastroenterology evidence cluster. Every specialism with a live Portfolio Pathway overview is below. Gastroenterology is the parent specialism for this deep-dive.
This deep-dive is part of the gastroenterology evidence cluster. Read it alongside the parent guide and the general evidence articles it cross-references.