Lisa Mathew, MD, wants to quell any misconceptions that private practice is dull or routine. “That has not been my experience at all,” says Dr. Mathew, a partner with South Denver Gastroenterology in the suburbs of Denver, Colorado.
“It’s an area within GI where we can be quite nimble in trialing new technologies, optimizing patients’ access to care and working to ensure a positive patient experience,” she said.
Nationwide, a flourishing GI private practice community engages in ongoing dialogue about improvements, navigating a changing healthcare environment, and innovation. “That has been a surprising and wonderful twist in my career,” she added.
Dr. Mathew fosters that dialogue through Gastro Broadcast, a podcast she shares with several other GI physicians. Targeted toward private GI practice, it highlights innovations within the community, providing updates on practice management and other technological advances.
In an interview, she spoke frankly about her favorite recent podcast guest, the challenges she’s faced in her career, and why her fellow GI specialists are her “tribe.”
Q: Why did you choose GI?
Dr. Mathew: In medical school at Duke University, I was considering going into ob.gyn., but academically I was a little more drawn toward internal medicine. While I was in my residency at the University of Pennsylvania, I really clicked with the gastroenterologists. I enjoyed their sense of humor. They were dealing with complex medical issues but doing so with a sense of levity and enjoyment in their work. When I entered fellowship at the University of Washington, I felt like I found my tribe. This was a group of people who really love their work, love medicine, love being able to develop their procedural skills, and keep a sense of humor about themselves. I married a cardiologist (and he’s a hilarious cardiologist), but the world of cardiology is a little more buttoned up. I like that GI is a little more relaxed.
Q: What gives you the most joy in your day-to-day practice?
Dr. Mathew: My patients. They are funny and genuine, and they allow you into these moments of vulnerability — it’s an honor to walk through that together. I’m always so grateful for the trust they put in me in those moments. As my practice has matured, it’s been incredible to watch those relationships grow, as well as begin caring for husbands, wives, sons and daughters of my patients. I enjoy being a part of my community.
Q: Can you talk about an interesting recent guest you had on your podcast? Who was it and why did he or she stand out?
Dr. Mathew: Russ Arjal, MD, AGAF, cofounder, chief medical officer and president of Telebelly Health. He’s been working on a platform for exclusively telehealth services that improves access to care; pairing patients with brick-and-mortar gastroenterology to provide any necessary procedural care, such as colonoscopy and upper endoscopy. It was a fantastic interview. I think it’s so refreshing and inspiring to see how people innovate within the field of GI. On the procedural side, you see this all the time. With my advanced endoscopy colleagues, they’re constantly pushing the boundaries of what we can do procedurally. My academic colleagues are constantly thinking through what the next best treatment is or how best can we optimize care. And, in the world of private practice, we’re thinking about practice care delivery — how to improve access and make the experience of being a patient better, with the ultimate goal of improving health outcomes.
Q: What fears did you have to push past to get to where you are in your career?
Dr. Mathew: Imposter Syndrome is a very, very common issue, maybe somewhat more for women in GI. I think it’s something that everybody wrestles with to some degree. For me, it was developing confidence not just in my clinical skills, but in learning all the complexities of running a small business. It takes time to develop confidence in your abilities and judgment. I think to some degree, that’s normal. It just takes a while to settle into whatever your chosen career path is. Having a community and strong mentors to support me has made all the difference.
Q: Describe your biggest practice-related challenge and what you are doing to address it.
Dr. Mathew: One of the greatest challenges in my career has been navigating COVID — both with just the tremendous sea change it had on our ability to practice, as well as the financial consequences to someone in private practice. Those were very challenging times to deliver the care that was needed, protect staff, and to maintain a small business. Fortunately, as with many practices across the nation, we’ve emerged through that.
We pivoted, we innovated with telehealth and other services that allowed us to care for our patients. But there were a lot of lessons learned and a lot of difficult moments.
Q: What teacher or mentor had the greatest impact on you?
Dr. Mathew: My dad has taught me the value of hard work. Being a physician just comes in tandem with hard work. And my mom, who is a nurse, has always shown the importance of empathy. Without it, everything else is a little empty. Medicine is a combination of skill and hard work, but also an ability to connect with other people. Empathy is essential to that.
Q: Describe how you would spend a free Saturday afternoon.
Dr. Mathew: We have three children who are native Coloradans so skiing is their birthright. Our entire family are diehard skiers. This is our joy. When you talk about the beach versus mountains debate, we are firmly team mountains. On a perfect Saturday afternoon, I’m on the slopes with my little crew, just tearing it up, having a great time.
Lightning Round
Texting or talking?
Texting
Favorite city in U.S. besides the one you live in?
Washington, D.C.
Favorite breakfast?
Avocado toast
Place you most want to travel to?
South America
Favorite junk food?
Candy
Favorite season?
Winter
How many cups of coffee do you drink per day?
2 or 3
If you weren’t a gastroenterologist, what would you be?
Ski coach
Best Halloween costume you ever wore?
Bunch of grapes
Favorite type of music?
Indie folk
Favorite movie genre?
Books, not into movies
Cat person or dog person?
Neither, but I am a certified beekeeper
What song do you have to sing along with when you hear it?
Anything by Queen
Introvert or extrovert?
Extrovert with introverted tendencies
Favorite holiday?
Thanksgiving
Optimist or pessimist?
100% glass half full
Summary content
7 Key Takeaways
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1
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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Production cost is under 20 cents per chip.
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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.