Bariatric Endoscopy Fellowship

What Is a Bariatric Endoscopy Fellowship?

Bariatric endoscopy is an advanced endoscopic subspecialty focused on the management of obesity and its metabolic consequences through luminal and intraluminal approaches—without the staples, anastomoses, or abdominal access of bariatric surgery. The procedural core includes endoscopic sleeve gastroplasty (ESG), intragastric balloon placement and removal, transoral outlet reduction (TORe) for revision of dilated gastrojejunal anastomoses after Roux-en-Y gastric bypass (RYGB), primary obesity surgery endoluminal (POSE) procedures, duodenal mucosal resurfacing (DMR), aspiration therapy, and a growing portfolio of endoscopic revision techniques for failed bariatric surgery anatomy.

This is not standard GI fellowship extended by enthusiasm. An attending gastroenterologist who completed core GI training does not have the procedural fluency to perform ESG independently—the suturing platform, tissue apposition mechanics, and case-volume threshold required sit well above anything encountered in a standard fellowship. It is also not bariatric surgery: you will not be operating in the abdomen, managing surgical anastomotic leaks primarily, or functioning within a surgical team hierarchy. The clinical overlap with bariatric surgery is real and sometimes contested (see the section on adjacent specialties), but the credentialing pathway, the technical skill set, and the patient journey are distinct.

The field sits at the intersection of advanced therapeutic endoscopy, obesity medicine, and metabolic disease management. Trainees who pursue it are typically already capable advanced endoscopists who want to own the endoscopic management of the obese patient longitudinally—primary weight loss procedures, surveillance, metabolic outcomes tracking, and revisional work when bariatric surgery has anatomically failed or when a patient declines or cannot tolerate surgery.

Accreditation Status — What You Need to Know

Bariatric endoscopy fellowship is not ACGME-accredited as of 2025. There is no ACGME program requirements document, no accredited program list, no common program requirements that govern training structure, duty hours, scholarly activity expectations, or evaluation standards. This is a factual status with real downstream consequences and you should understand them before you apply.

Training currently occurs through three structural models:

• Institutional advanced endoscopy fellowships with a bariatric track. A small number of high-volume academic centers have embedded bariatric endoscopy as a formal component of their advanced endoscopy fellowship year, alongside EUS and ERCP. The bariatric component may occupy several months of a twelve-month program or may be a dedicated focus for the full year depending on center volume and program design.
• Standalone one-year bariatric endoscopy fellowships. Select centers with very high ESG and revisional procedure volume have developed dedicated one-year training positions. These are the closest analog to a formal fellowship and are the most likely to produce privileging-ready procedural volume by the end of training.
• Industry-sponsored preceptorships and short-course training. Device manufacturers (Apollo Endosurgery for ESG via the OverStitch platform, Obalon and Orbera for balloons) offer proctored training and certification pathways. These are not fellowships. They produce enough supervised volume to achieve a minimum competency threshold for privileging at some institutions but do not substitute for immersive fellowship-level training in terms of independent procedural fluency, complication management, and patient selection judgment.

What non-accreditation means in practice:

• Credential portability is center-dependent. When you leave training and apply for hospital privileges, there is no ACGME completion certificate that carries national recognition. Each hospital's credentialing committee evaluates your case logs, training attestation letters, and proctor sign-off individually. A well-documented fellowship at a recognized high-volume center carries weight; a thin preceptorship may not.
• Case volume documentation is your credential. Because there is no board exam or accredited completion milestone, your procedure log is the primary evidence of competency. Meticulous logging from day one of training is not optional—it is the asset you will present for every privileging application for the rest of your career.
• Program quality is highly variable. Without accreditation standards, programs differ substantially in case volume, supervision structure, curriculum, and the degree to which trainees achieve independent proficiency. Evaluating programs requires due diligence that accreditation would otherwise provide.
• The accreditation landscape may change. The ASGE and ACG have both engaged with the question of formalizing training standards. Nothing is accredited now, but the trajectory of the field and device adoption make formal pathways more likely over the next several years. Trainees entering now are doing so ahead of that formalization—which has both risk and positioning advantage.

Who Pursues This Fellowship?

The most common pathway into bariatric endoscopy fellowship runs through ACGME GI fellowship followed by advanced endoscopy fellowship (with EUS and ERCP as the primary technical content), after which the trainee either pursues an additional bariatric-focused year or joins a center that has embedded bariatric endoscopy within a longer advanced training program.

A smaller cohort pursues bariatric endoscopy as the primary focus of their advanced endoscopy fellowship year, particularly at centers where ESG volume is high enough to support dedicated training. These trainees may have lighter EUS/ERCP exposure than a traditional advanced endoscopy fellow—a tradeoff that has career implications for practice settings where ERCP and EUS generate the bulk of procedural revenue and referrals.

A third, less common route comes from surgical gastroenterology or foregut surgery: surgeons who have completed bariatric surgery training and want to extend their practice into endoscopic revision and primary endoscopic weight loss procedures. This pathway is procedurally logical—foregut anatomy, RYGB revisions, and stapling mechanics are familiar—but the endoscopic suturing skill set and luminal endoscopy workflow require dedicated training regardless of surgical background.

There is no single required entry point, but the practical floor is completion of ACGME GI fellowship with solid general endoscopy volume. Trainees who arrive with advanced endoscopy experience (particularly flexible endoscopic suturing exposure or EUS/ERCP competency) will advance faster through the bariatric-specific learning curve.

Core Procedural Competencies

A trainee completing a rigorous bariatric endoscopy fellowship should achieve independent competency in the following:

• Endoscopic sleeve gastroplasty (ESG). Full-thickness endoscopic suturing of the gastric greater curvature to reduce luminal volume and alter gastric motility. Technical demands include scope retroflexion stability, tissue grasping under load, suture pattern planning, and management of perforation risk. This is the anchor procedure of the specialty.
• Intragastric balloon placement and removal. Both fluid-filled (Orbera) and gas-filled balloon systems; sedation management, patient selection, balloon exchange, and complication recognition (migration, deflation, intolerance).
• Transoral outlet reduction (TORe). Endoscopic suturing of the dilated gastrojejunal anastomosis in post-RYGB patients with weight regain. Technically demanding due to distorted anatomy, limited working space, and the need for precise tissue apposition at the anastomosis.
• Primary obesity surgery endoluminal (POSE) procedures. Full-thickness plications of the gastric fundus and body; less widely adopted than ESG but part of the procedural vocabulary at centers that offer it.
• Duodenal mucosal resurfacing (DMR). Hydrothermal ablation of the duodenal mucosa targeting metabolic (primarily type 2 diabetes) rather than weight endpoints; still evolving toward broader adoption but present in fellowship curricula at leading centers.
• Endoscopic revision of Roux-en-Y gastric bypass anatomy. Beyond TORe, this includes management of marginal ulcers, evaluation of anastomotic strictures, and endoscopic assessment of pouch and limb anatomy—skills that overlap with advanced endoscopy but require anatomic fluency specific to bariatric surgical constructs.
• Aspiration therapy management. Patient selection, device placement, and follow-up management for aspiration-based obesity treatment, where available.
• Fluoroscopy basics. Real-time fluoroscopic guidance is used in several bariatric endoscopy procedures; radiation safety, image interpretation, and basic fluoroscopic technique are expected skills.
• Complication recognition and management. Periprocedural bleeding, perforation, leaks, and post-procedural pain management—with clear understanding of when surgical consultation is mandatory.
• Patient selection and obesity medicine integration. This is not purely technical. Independent practice requires the ability to assess candidacy (BMI thresholds, metabolic comorbidities, prior surgical history, behavioral readiness), coordinate with dietitians, obesity medicine physicians, and bariatric surgeons, and manage long-term follow-up with realistic outcomes counseling.

Training Program Landscape

The number of centers offering structured bariatric endoscopy training is small relative to programs offering ERCP or EUS training. High-volume academic medical centers with dedicated bariatric endoscopy programs exist at a handful of institutions, concentrated in academic urban centers with high obesity surgery referral volume and established bariatric programs. The ASGE Bariatric Endoscopy Task Force has been the primary professional society node for identifying these programs; their published resources and membership contacts are the most reliable starting point for a current program list, which shifts as centers add or discontinue training positions.

Program duration varies:

• Programs embedded within advanced endoscopy fellowships typically allocate several months to bariatric endoscopy within a twelve-month structure. Whether this is sufficient to reach independent competency depends heavily on case volume during those months.
• Standalone dedicated programs typically run six to twelve months. Twelve-month programs at centers with very high ESG volume are the most likely to produce trainees who can credential and practice independently without a post-fellowship proctorship.

Case volume benchmarks matter and are imprecisely standardized. The ASGE has published competency benchmarks suggesting approximately fifty or more ESG cases as a threshold for procedural competency, though the evidence base for this specific number is expert consensus rather than controlled learning-curve data. Trainees should ask program directors directly: how many ESGs did last year's fellow log? How many TORe cases? The answers to those questions are more informative than program length alone.

Some programs have industry relationships with Apollo Endosurgery (the OverStitch platform used for ESG and TORe) that provide device access, proctoring support, and training resources. This is not inherently problematic but is worth understanding when evaluating how a program's training curriculum is structured and whether it produces broadly competent proceduralists or platform-specific technicians.

Application Process & Timeline

There is no central match, no common application service, and no standardized deadline for bariatric endoscopy fellowships. Every program runs its own selection process on its own calendar. This means the application process is entirely relationship- and initiative-driven, and tardiness is penalized severely—positions at high-volume centers are filled early, often through networks already known to the program director.

The practical timeline for an applicant targeting a position starting after GI fellowship completion (or after advanced endoscopy fellowship):

• 18 months before intended start: Identify target programs. Use ASGE resources, DDW and ACG meeting contacts, and direct outreach to faculty at centers known for bariatric endoscopy volume. Build a list of five to eight programs worth pursuing.
• 15–16 months before intended start: Make initial contact with program directors. Email is standard; brief, specific, and non-generic. State your training background, your specific interest in bariatric endoscopy (not "advanced endoscopy broadly"), and ask about the program's training structure and whether they are accepting fellows for your intended start year. Many program directors respond well to applicants who have done enough homework to ask informed questions.
• 12–14 months before intended start: If you have any opportunity to rotate at a target center during your current fellowship, pursue it. A one- to two-week bariatric endoscopy rotation during GI or advanced endoscopy fellowship, even in an observational capacity, demonstrates genuine interest and gives the program director direct familiarity with you as a trainee.
• 12 months before intended start: Formal applications, where programs request them. Typical components: CV, personal statement focused on bariatric endoscopy specifically, three letters of recommendation (ideally including at least one from a faculty member known to work in therapeutic or advanced endoscopy), and procedure logs showing endoscopy volume.
• 10–12 months before intended start: Interviews. Most programs conduct one to two in-person or virtual interviews. These are genuinely evaluative—program directors are small communities and they talk to each other. Professionalism, intellectual seriousness, and realistic understanding of what non-accredited training means for your career are all assessed.
• 8–10 months before intended start: Offers and acceptance. There is no match scramble to protect you if you hold offers too long; communicate clearly and decide promptly.

Attend DDW (Digestive Disease Week) and ACG annual meetings during your GI or advanced endoscopy fellowship years. The bariatric endoscopy sessions at these meetings are where the community is small enough that introducing yourself to faculty is genuinely feasible and professionally appropriate.

Eligibility & Prerequisites

Minimum requirements across programs generally include:

• Completion of ACGME-accredited GI fellowship (internal medicine base plus three-year GI fellowship, or categorical program equivalent).
• Documented endoscopy volume at or above ASGE competency benchmarks for standard endoscopy procedures—colonoscopy, upper endoscopy, basic hemostasis.
• For most programs, completion of or concurrent enrollment in advanced endoscopy fellowship is either required or strongly preferred. A trainee who has completed core GI fellowship only, without advanced endoscopy training, will be underprepared for the technical demands of ESG and TORe and will likely be screened out at competitive programs.

Preferred but not universally required:

• Flexible endoscopic suturing experience. Even limited exposure to the OverStitch platform during advanced endoscopy fellowship is meaningful preparation and signals to programs that you are not arriving with zero suturing experience.
• Research or publication activity in obesity endoscopy, obesity medicine, or metabolic disease. The field is young enough that even a case report, a poster, or a review article in the area demonstrates intellectual engagement that distinguishes you from applicants whose interest is purely procedural.
• Bariatric surgery rotation or obesity medicine clinical exposure during GI training. Understanding surgical anatomy, the post-bariatric patient's clinical complexity, and how bariatric surgeons think about revisional work makes you a more capable trainee and a more credible colleague in multidisciplinary practice.

Foregut surgery background is valued at some centers, particularly for applicants pursuing bariatric endoscopy from a surgical route. This is not a common pathway but is not disqualifying at programs that have experience integrating surgeon-trainees into an endoscopy-centered curriculum.

Compensation & Funding

Most bariatric endoscopy fellowship positions are funded through institutional stipends structured similarly to advanced endoscopy fellowship compensation at the same institution. Because this fellowship is not ACGME-accredited, there is no standardized stipend scale and no CMS GME funding mechanism tied to position support. See our fellowship compensation data page for current ranges and institution-by-institution variation.

A minority of positions have partial or full industry funding through device manufacturer partnerships. These arrangements are disclosed at reputable programs and do not in themselves compromise training quality, but trainees should understand that industry-funded positions may have implicit expectations around device adoption or publication activity. Ask directly about the funding structure and any associated obligations before accepting.

Direct program inquiry is the only reliable method for current stipend information. Program directors or fellowship coordinators will provide this on request once you are in active conversation about a position.

Boards, Certification & Credentialing

There is no dedicated board certification exam for bariatric endoscopy. No American Board of Medical Specialties (ABMS) member board certifies in this subspecialty as of 2025. This is a direct consequence of non-accreditation and the relatively recent emergence of the field.

Hospital privileging is the operative credentialing mechanism, and it occurs procedure by procedure. When you join a practice or hospital medical staff and seek privileges to perform ESG, TORe, or intragastric balloon procedures, the credentialing committee will ask for:

• A detailed procedure log from training with case counts by procedure type, role (primary operator vs. assisted), and outcomes.
• A letter of attestation from your training program director affirming that you achieved independent competency.
• Proctored cases at the granting institution—typically two to five cases observed by a credentialed bariatric endoscopist who signs off on your performance before independent privileges are granted.
• Evidence of training on the specific device platform(s) used at that institution (e.g., Apollo OverStitch certification for ESG).

The ASGE has published competency benchmarks for bariatric endoscopy procedures, including ESG case volume thresholds, as part of its broader effort to formalize quality standards in the field. These documents are the closest thing to a recognized national standard and are worth knowing intimately—they are what sophisticated credentialing committees will reference when evaluating your application. Download and familiarize yourself with the current ASGE position statements on bariatric endoscopy competency; they are publicly available on the ASGE website.

The strategic implication: your procedure log during fellowship is not administrative paperwork. It is the primary document that will determine whether you can practice independently at your first job. Maintain it in detail from the first week of training. Record procedure type, complexity, your role, complications, and outcomes. A log that ends at "ESG x 52" is less useful than one that documents your progression from supervised to independent across the case series.

Career Outcomes & Practice Settings

Bariatric endoscopists in practice currently occupy three broad settings:

• Academic medical centers with dedicated bariatric endoscopy programs. This is the most common immediate post-fellowship destination for trainees from high-volume programs. The appeal is access to case volume, research infrastructure, multidisciplinary bariatric teams, and the ability to continue building the procedural experience needed to maintain competency in lower-frequency procedures like TORe and DMR. The tradeoff is academic compensation structure, administrative load, and the reality that bariatric endoscopy is still a small fraction of total GI RVU production at most academic departments.
• Private practice GI groups with obesity medicine integration. A growing number of private and hybrid GI practices are adding bariatric endoscopy as a service line, driven by patient demand for non-surgical weight loss options and by the procedural revenue potential of ESG relative to standard GI procedures. The fit is better when the practice has an established obesity medicine or weight loss program that generates referrals, or when the bariatric endoscopist is willing to build that referral base from within primary care and internal medicine networks.
• Multidisciplinary weight loss centers. Hospital-based or free-standing bariatric centers that offer medical, surgical, and endoscopic weight loss options are a natural home for bariatric endoscopists who want to function as the procedural arm of a comprehensive program. These settings typically have the strongest referral infrastructure and the most consistent case volume, but the scope of practice may be narrower than a full GI position.

The GLP-1 receptor agonist era has meaningfully affected the bariatric endoscopy landscape in ways that cut in both directions. GLP-1 agents have reduced the number of patients proceeding to primary bariatric surgery—and some of those patients are choosing ESG as a lower-invasiveness alternative or as a bridge. More significantly, the large number of patients who underwent RYGB or sleeve gastrectomy in prior decades and are now experiencing weight regain, and who may be GLP-1 partial responders, represents a growing pool of candidates for TORe and other revisional endoscopic procedures. The revisional endoscopy demand trajectory is one of the stronger near-term arguments for the field's growth.

Salary & Job Market After Fellowship

Bariatric endoscopists typically enter the job market as advanced endoscopists with an additional subspecialty skill set, and compensation reflects that positioning. See our physician compensation data page for current advanced endoscopy and bariatric endoscopy salary ranges by practice setting—we do not embed specific figures in editorial content because they move with the market and become misleading within a single application cycle.

What is structurally true and unlikely to change quickly:

• Bariatric endoscopy procedures are billed as interventional endoscopy and carry higher RVU values than standard diagnostic or surveillance endoscopy. Compensation structures that include productivity components will reflect this, particularly if you are generating ESG volume in a setting where no one else on staff performs the procedure.
• Geographic variation is substantial. Markets with high obesity prevalence, limited bariatric surgical access, and insurance environments that cover endoscopic obesity procedures will generate more case volume and stronger negotiating position than markets where the procedure is primarily self-pay or where surgical bariatric capacity is robust.
• The self-pay dynamic matters. ESG is not universally covered by commercial insurance as of 2025; coverage is expanding but inconsistent. Practices built primarily on self-pay ESG are more sensitive to economic conditions and patient cost sensitivity than practices where insurance reimbursement is reliable. When evaluating job offers, ask specifically about the payer mix for bariatric endoscopy procedures at that practice.
• Negotiating procedural add-on compensation is reasonable and expected. If you are joining a GI practice as the only person credentialed to perform ESG, the value of that skill set is quantifiable. Come to salary negotiations with an understanding of ESG RVU values and the practice's expected case volume.

How Bariatric Endoscopy Compares to Adjacent Specialties

Understanding the turf and referral dynamics around bariatric endoscopy is not academic—it directly affects your day-to-day professional relationships and practice viability.

Versus advanced endoscopy (ERCP/EUS): Advanced endoscopy fellows who train primarily in ERCP and EUS are procedure-volume-dependent in a different way—pancreaticobiliary disease is episodic and referral-driven from community gastroenterologists and surgeons, whereas bariatric endoscopy is predominantly elective and patient-demand-driven. The technical skill sets overlap at the level of flexible endoscopic suturing and complex scope manipulation, but the clinical workflows, referral sources, and patient populations are distinct. Many academic programs want their advanced endoscopists to do both; in private practice, doing both is a stronger market position than either alone.

Versus bariatric surgery: This is the relationship that requires the most careful navigation. Bariatric surgeons and bariatric endoscopists share a patient population and, in the case of revisional procedures, share clinical scenarios. At well-functioning programs, the relationship is collaborative: surgeons refer patients who are not surgical candidates or who decline surgery, and endoscopists refer patients who fail endoscopic management or develop complications requiring surgical intervention. At programs with less mature multidisciplinary infrastructure, turf conflict is real. ESG outcomes data, compared to sleeve gastrectomy, shows less total weight loss with a better safety profile—a genuine clinical tradeoff that determines patient selection, not a competition. Understanding this framing and being able to articulate it to surgical colleagues is part of functioning professionally in the space.

Versus general GI: A general gastroenterologist cannot perform ESG or TORe without dedicated training and credentialing. This creates a genuine scope-of-practice boundary that does not exist between general and advanced endoscopy in most procedures. It also means that general GI colleagues are a referral source for you, not competitors—provided you have positioned yourself clearly and they understand what you offer.

Versus obesity medicine: Obesity medicine physicians (ABOM-certified internists, endocrinologists, family medicine physicians) manage the medical side of obesity—lifestyle, pharmacotherapy including GLP-1 agents, behavioral intervention. They are natural co-managers and referral partners for bariatric endoscopists, not competitors. Building these relationships early, including during fellowship, is one of the most high-yield career development moves available in this subspecialty.

Building Your Application — Standout Strategies

Concrete actions, ordered by impact:

• Contact the ASGE Bariatric Endoscopy Task Force for a current program list. The ASGE website and member services staff can direct you to published resources and task force contacts. This is the most reliable publicly accessible starting point for identifying programs, because informal program directories circulate in the community but go stale quickly.
• Identify two to three faculty at your target programs and read their published work before reaching out. A message to a program director that references a specific paper, case series, or technique they have published is not flattery—it is evidence that your interest is specific and substantive. Program directors in a small field can distinguish genuine intellectual engagement from a form-letter inquiry within two sentences.
• Arrange a rotation during GI or advanced endoscopy fellowship. A one- to two-week clinical rotation at a target center, even observational, accomplishes three things: it gives you accurate information about the program's actual training experience (vs. the marketing version), it gives the program director direct experience of you as a trainee, and it generates a relationship that can anchor a strong letter of recommendation. Most programs will accommodate a visiting fellow rotation if contacted early and professionally.
• Generate a publication or presentation in obesity endoscopy before you apply. A case report of an unusual ESG complication, a systematic review of TORe outcomes, or a poster at DDW on endoscopic management of post-bariatric anatomy are all achievable during fellowship training and all meaningfully differentiate you from applicants with identical procedural logs and letters. The field is young; literature gaps are real and findable.
• Attend DDW and ACG with explicit bariatric endoscopy programming as a target. Go to the bariatric endoscopy sessions. Introduce yourself to speakers after talks. The community is small enough that being a recognizable face with a substantive question is professionally meaningful in a way that is not true of larger subspecialties.
• Be direct about the non-accreditation reality in your application materials. Applicants who demonstrate that they understand the credentialing implications of non-accredited training—who can articulate how they will document competency, how they will approach hospital privileging, and what their strategy is for building an independent practice—are more credible candidates than applicants who write as though the fellowship is equivalent to an ACGME-accredited pathway. Program directors know the landscape; they want trainees who do too.
• Clarify your post-fellowship practice model before you interview. Know whether you are targeting academic medicine, private practice, or a multidisciplinary weight loss center, and be able to explain why in terms of what that setting requires from bariatric endoscopy and what you bring to it. Vague career goals in a small-community fellowship interview are more visible, and more costly, than they are in a large ACGME match.