Addressing supply-demand mismatch in GI
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11/01/2023
Impacts of this supply-demand mismatch are felt daily in our GI practices as we strive to expand access in our clinics and endoscopy suites, particularly in rural and urban underserved communities. In gastroenterology, increased demand for care has been driven by a perfect storm of population growth, increased patient awareness of GI health, and rising incidence of digestive diseases.
Between 2019 and 2034, the U.S. population is expected to grow by 10.6%, while the population aged 65 and older expands by over 42%. Recent increases in the CRC screening–eligible population also have contributed to unprecedented demand for GI care. Furthermore, care delivery has become more complex and time-consuming with the evolution of personalized medicine and high prevalence of comorbid conditions. At the same time, we are faced with a dwindling supply of gastroenterology providers. In 2021, there were 15,678 practicing gastroenterologists in the U.S., over half of whom were 55 years or older. This translates to 1 gastroenterologist per 20,830 people captured in the U.S. Census.
Addressing this striking supply-demand mismatch in GI requires a multi-pronged approach that addresses its complex drivers. First and foremost, we must expand the number of GI fellowship training slots to boost our pipeline. There are approximately 1,840 GI fellows currently in training, a third of whom enter the workforce each year. While the number of GI fellowship slots in the GI fellowship match has slowly increased over time (from 525 available slots across 199 programs in 2019 to 657 slots across 230 programs in 2023), this incremental growth is dwarfed by overall need. Continued advocacy for increased funding to support expansion of training slots is necessary to further move the needle – such lobbying recently led to the addition of 1,000 new Medicare-supported graduate medical education positions across specialties over a 5-year period starting in 2020, illustrating that change is possible. At the same time, we must address the factors that are causing gastroenterologists to leave the workforce prematurely through early retirement or part-time work by investing in innovative solutions to address burnout, reduce administrative burdens, enhance the efficiency of care delivery, and maintain financial viability. By investing in our physician workforce and its sustainability, we can ensure that our profession is better prepared to meet the needs of our growing and increasingly complex patient population now and in the future.
We hope you enjoy the November issue of GI & Hepatology News and have a wonderful Thanksgiving.
Megan A. Adams, MD, JD, MSc
Editor-in-Chief
Summary content
7 Key Takeaways
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Developed a paper-based colorimetric sensor array for chemical threat detection.
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Can detect 12 chemical agents, including industrial toxins.
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Utilizes dye-loaded silica particles on self-adhesive paper.
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Provides rapid, simultaneous identification through image analysis.
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Inspired by the mammalian olfactory system for pattern recognition.
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Future developments include a machine learning-enabled reader device.
The guidelines emphasize four-hour gastric emptying studies over two-hour testing. How do you see this affecting diagnostic workflows in practice?
Dr. Staller: Moving to a four-hour solid-meal scintigraphy will actually simplify decision-making. The two-hour reads miss a meaningful proportion of delayed emptying; standardizing on four hours reduces false negatives and the “maybe gastroparesis” purgatory that leads to repeat testing. Practically, it means closer coordination with nuclear medicine (longer slots, consistent standardized meal), updating order sets to default to a four-hour protocol, and educating front-line teams so patients arrive appropriately prepped. The payoff is fewer equivocal studies and more confident treatment plans.
Metoclopramide and erythromycin are the only agents conditionally recommended for initial therapy. How does this align with what is being currently prescribed?
Dr. Staller: This largely mirrors real-world practice. Metoclopramide remains the only FDA-approved prokinetic for gastroparesis, and short “pulsed” erythromycin courses are familiar to many of us—recognizing tachyphylaxis limits durability. Our recommendation is “conditional” because the underlying evidence is modest and patient responses are heterogeneous, but it formalizes what many clinicians already do: start with metoclopramide (lowest effective dose, limited duration, counsel on neurologic adverse effects) and reserve erythromycin for targeted use (exacerbations, bridging).
Several agents, including domperidone and prucalopride, received recommendations against first-line use. How will that influence discussions with patients who ask about these therapies?
Dr. Staller: Two points I share with patients: evidence and access/safety. For domperidone, the data quality is mixed, and US access is through an FDA IND mechanism; you’re committing patients to EKG monitoring and a non-trivial administrative lift. For prucalopride, the gastroparesis-specific evidence isn’t strong enough yet to justify first-line use. So, our stance is not “never,” it’s just “not first.” If someone fails or cannot tolerate initial therapy, we can revisit these options through shared decision-making, setting expectations about benefit, monitoring, and off-label use. The guideline language helps clinicians have a transparent, evidence-based conversation at the first visit.
The guidelines suggest reserving procedures like G-POEM and gastric electrical stimulation for refractory cases. In your practice, how do you decide when a patient is “refractory” to medical therapy?
Dr. Staller: I define “refractory” with three anchors.
1. Adequate trials of foundational care: dietary optimization and glycemic control; an antiemetic; and at least one prokinetic at appropriate dose/duration (with intolerance documented if stopped early).
2. Persistent, function-limiting symptoms: ongoing nausea/vomiting, weight loss, dehydration, ER visits/hospitalizations, or malnutrition despite the above—ideally tracked with a validated instrument (e.g., GCSI) plus nutritional metrics.
3. Objective correlation: delayed emptying on a standardized 4-hour solid-meal study that aligns with the clinical picture (and medications that slow emptying addressed).
At that point, referral to a center with procedural expertise for G-POEM or consideration of gastric electrical stimulation becomes appropriate, with multidisciplinary evaluation (GI, nutrition, psychology, and, when needed, surgery).
What role do you see dietary modification and glycemic control playing alongside pharmacologic therapy in light of these recommendations?
Dr. Staller: They’re the bedrock. A small-particle, lower-fat, calorie-dense diet—often leaning on nutrient-rich liquids—can meaningfully reduce symptom burden. Partnering with dietitians early pays dividends. For diabetes, tighter glycemic control can improve gastric emptying and symptoms; I explicitly review medications that can slow emptying (e.g., opioids; consider timing/necessity of GLP-1 receptor agonists) and encourage continuous glucose monitor-informed adjustments. Pharmacotherapy sits on top of those pillars; without them, medications will likely underperform.
The guideline notes “considerable unmet need” in gastroparesis treatment. Where do you think future therapies or research are most urgently needed?
Dr. Staller: I see three major areas.
1. Truly durable prokinetics: agents that improve emptying and symptoms over months, with better safety than legacy options (e.g., next-gen motilin/ghrelin agonists, better-studied 5-HT4 strategies).
2. Endotyping and biomarkers: we need to stop treating all gastroparesis as one disease. Clinical, physiologic, and microbiome/omic signatures that predict who benefits from which therapy (drug vs G-POEM vs GES) would transform care.
3. Patient-centered trials: larger, longer RCTs that prioritize validated symptom and quality-of-life outcomes, include nutritional endpoints, and reflect real-world medication confounders.
Our guideline intentionally highlights these gaps to hopefully catalyze better trials and smarter referral pathways.
Dr. Staller is with the Division of Gastroenterology, Massachusetts General Hospital and Harvard Medical School, Boston.