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Precision Gastroenterology Hero

Digestive Health · Advanced GI Medicine

Transforming Digestive Care Through
Precision Gastroenterology

Microbiome Analysis · GI Biomarkers · Endoscopic Imaging · Motility Mapping · IBD Protocols · Gut-Brain Axis

Microbiome

Precision Restored

GI-First

Centered Care

100%

Targeted Protocols

Evidence

Based Outcomes

Department Overview

Pre·ci·sion
Gas·tro·en·
ter·ol·o·gy

/ ˈpreSHən ˌɡastrōənˌterˈäləjē / · noun

noun · precision digestive medicine

The integration of genomic, microbiome, and metabolic profiling with advanced gastrointestinal diagnostics - moving beyond symptom-based treatment to the molecular and cellular root causes driving digestive dysfunction, mucosal inflammation, and gut-systemic disease in each individual patient.

Origin

From Greek gaster (stomach) + enteron (intestine) + -logia (study of). Precision gastroenterology emerged as metagenomic sequencing, single-cell transcriptomics of intestinal epithelium, and spatial proteomics of the gut mucosa revealed that clinically similar presentations of IBD, IBS, and metabolic GI disease harbor molecularly distinct etiologies - requiring individualized diagnostic and therapeutic strategies beyond conventional endoscopic and pharmacologic protocols.

The Precision Gastroenterology Department at the American Board of Precision Medicine trains clinicians to look beyond standard endoscopy and stool panels - integrating microbiome composition analysis, intestinal permeability profiling, mucosal immune phenotyping, and gut-brain axis assessment into a molecularly complete picture of each patient's digestive biology and treatment response potential.

From IBD endotype stratification and SIBO-motility axis dysfunction to mitochondrial enterocyte failure, epigenetic regulation of mucosal immunity, and pharmacogenomic optimization of biologic therapy, this department equips physicians with the molecular and metabolic fluency to identify the upstream biological drivers of GI disease - and to design individualized interventions that address root causes rather than symptoms.

Digestive health is not simply a function of diet and anatomy - it is the downstream expression of a patient's entire microbial, immune, and genomic architecture. At ABOPM, Precision Gastroenterology provides the precision framework to decode that architecture for every patient, transforming fragmented lab values into a coherent, actionable map of individual gut health potential.

N=1

Microbiome Profiling

Root

Cause GI Care

Full

Gut Optimization

Precision Gastroenterology Department · ABOPM

Where Digestive Precision Transforms
Gut Health and GI Medicine

The Precision Gastroenterology Department at ABOPM is redefining digestive care — training physicians to move beyond standard endoscopy and symptom-based protocols, integrating microbiome composition analysis, intestinal permeability profiling, mucosal immune phenotyping, and gut-brain axis assessment into a molecularly complete picture of each patient's unique digestive biology.

Microbiome & Genomic Profiling

Advancing clinical application of metagenomic microbiome sequencing, intestinal epithelial transcriptomics, IBD endotype stratification, SIBO-motility axis evaluation, and pharmacogenomic optimization of biologic therapy — enabling physicians to build a molecularly precise GI portrait for every patient and guide individualized treatment from first consultation.

Mucosal & Gut-Brain Systems

Bridging molecular gastroenterology and systemic outcomes — developing board-certified frameworks for mucosal immune phenotyping, intestinal permeability assessment, mitochondrial enterocyte dysfunction, epigenetic regulation of mucosal immunity, and gut-brain axis analysis to identify and address the upstream molecular drivers of digestive disease and systemic GI-related dysfunction.

Physician Education

Building the next generation of precision gastroenterologists through rigorous board standards, molecular GI literacy training, and interdisciplinary collaboration across clinical genomics, mucosal immunology, metabolic medicine, the microbiome sciences, and translational digestive health research.

"Digestive health is not simply a function of diet and anatomy — it is the downstream expression of a patient's entire microbial, immune, and genomic architecture. The Precision Gastroenterology Department at ABOPM trains physicians to decode that architecture for every patient, transforming fragmented lab values into a coherent, actionable map of individual gut health potential."

American Board of Precision Medicine · Precision Gastroenterology Department

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Precision Gastroenterology Department · ABOPM

Decoding Each Patient's Digestive Biology
to Deliver Precision Gut and GI Care

No two patients develop IBD, IBS, or metabolic GI disease for the same molecular reason. Behind every unexplained digestive complaint, every refractory Crohn's flare, and every failed biologic lies a specific biological substrate — microbial dysbiosis patterns, mucosal immune phenotypes, intestinal permeability signatures, and gut-brain axis dysregulations that population-based treatment algorithms and standard endoscopy were never designed to resolve. Identifying the molecular architecture of each patient's digestive biology — and matching intervention to that architecture — is not a specialized aspiration; it is the precision obligation of modern gastroenterology.

Precision gastroenterology equips clinicians to move beyond standard colonoscopy and empirical pharmacotherapy and into molecularly stratified digestive care — applying metagenomic microbiome profiling, mucosal transcriptomics, intestinal permeability mapping, and gut-brain axis assessment to identify the upstream biological drivers of GI disease and design individualized intervention strategies from the first clinical encounter.

By mastering precision gastroenterology, clinicians gain the power to:

01

Build Each Patient's Microbiome and Genomic GI Portrait

Move beyond colonoscopy and stool culture to construct a molecularly complete digestive profile — applying metagenomic microbiome sequencing, IBD endotype stratification, intestinal epithelial transcriptomics, and SIBO-motility axis evaluation to identify the specific microbial and molecular architecture driving each patient's GI disease and design targeted interventions from the first consultation rather than after multiple failed treatment cycles.

02

Map Mucosal Immune Dysfunction with Molecular Precision

Apply mucosal immune phenotyping, intestinal permeability barrier assessment, neuroinflammatory cytokine profiling, and epithelial tight junction dysfunction analysis to identify the specific immunological network disruptions driving mucosal inflammation, barrier failure, and systemic GI-immune crosstalk — enabling mechanistically targeted interventions that address root causes rather than suppress symptoms with broad immunosuppression.

03

Profile Gut-Brain Axis and Motility Dysfunction

Integrate gut-brain axis neurochemical profiling, enteric nervous system dysfunction assessment, motility disorder molecular mapping, and neuroendocrine GI signaling analysis to characterize the neurobiological drivers of functional GI disorders — identifying patient-specific gut-brain disconnect patterns that predict treatment response and guide neuromodulatory and dietary intervention strategies with molecular precision.

04

Apply PGx-Optimized Biologic and Microbiome Therapy

Use pharmacogenomic profiling of drug-metabolizing enzyme variants, biologic receptor polymorphisms, and immunomodulator pathway genetics to individualize IBD biologic selection and dosing — eliminating primary non-response and adverse drug reactions through genotype-guided therapy, while integrating microbiome restoration strategies to rebuild microbial diversity and mucosal immune homeostasis from the ground up.

05

Lead Precision GI Medicine at Your Institution

Become the molecular gastroenterology authority your institution needs — the physician who builds genomically grounded IBD programs, leads microbiome restoration and gut-brain optimization clinics, and creates the institutional infrastructure for precision digestive care that moves patients from empirical protocol cycling to molecularly individualized strategies that maximize GI health outcomes from the first intervention.

Why Precision Gastroenterology Certification Is Non-Negotiable

Every patient has a digestive biology. The question is, are you equipped to decode it?

Precision-Driven Outcomes

Molecularly stratified GI care consistently outperforms empirical pharmacotherapy — delivering measurably better remission rates, fewer biologic failures, and reduced treatment burden by identifying and addressing the specific molecular drivers of each patient's digestive disease from the first clinical decision rather than discovering them through costly, damaging trial and error.

Future-Ready Practice

Metagenomic microbiome analysis, mucosal spatial transcriptomics, gut-brain neurochemical profiling, AI-guided biologic optimization, and intestinal organoid drug testing are transforming GI medicine — physicians board-certified in precision gastroenterology will define the next generation of molecularly individualized digestive care.

Clinical Authority

Board certification in precision gastroenterology marks you as the microbiome and molecular GI medicine authority — a physician equipped to lead complex IBD programs, precision biologic optimization clinics, and institutional digestive medicine initiatives grounded in molecular biology rather than empirical protocol application.

Cross-System Impact

Precision gastroenterology principles span IBD, IBS, SIBO, metabolic liver disease, colorectal cancer prevention, and gut-immune systemic disease — giving you a molecularly grounded framework to address digestive and gut-systemic health across the full lifespan and every clinical GI presentation you encounter.

Active research areas driving precision gastroenterology forward:

01

Metagenomic Microbiome Profiling & Dysbiosis Classification

Advancing the construction and clinical validation of metagenomic microbiome dysbiosis signatures — characterizing the microbial community composition, functional gene pathway disruptions, short-chain fatty acid production deficits, and bacteriome-mycobiome interaction patterns that predict IBD flare risk, IBS subtype, SIBO recurrence, and biologic therapy response, building the evidence base for microbiome-guided treatment selection that replaces empirical antibiotic and dietary protocols with molecularly stratified microbiome restoration strategies.

02

IBD Endotype Stratification & Molecular Classification

Developing molecularly coherent IBD endotype classification frameworks beyond anatomical Crohn's and ulcerative colitis designations — applying genomic, transcriptomic, mucosal immune phenotyping, and cytokine pathway profiling to define biologically distinct IBD subtypes that predict differential response to anti-TNF, anti-integrin, anti-IL-12/23, and JAK inhibitor therapy, enabling biologic selection matched to the specific immunological and molecular architecture of each patient's inflammatory bowel disease.

03

Mucosal Barrier Integrity & Intestinal Permeability Biology

Advancing the molecular characterization of intestinal barrier dysfunction — applying tight junction protein expression profiling, zonulin pathway assessment, single-cell RNA sequencing of intestinal epithelial and goblet cell populations, and mucosal immune tolerance pathway analysis to identify the patient-specific molecular mechanisms of barrier failure that drive systemic inflammation, autoimmune GI disease, and gut-systemic crosstalk, guiding precision mucosal restoration and barrier strengthening intervention strategies.

04

Gut-Brain Axis Neurobiology & Motility Dysfunction

Characterizing the neuroenteric and gut-brain axis determinants of functional GI disorders — advancing enteric nervous system dysfunction biomarker development, gut-derived serotonin pathway disruption analysis, vagal tone assessment, and neuroendocrine GI signaling profiling methods that identify the molecular signatures of gut-brain disconnect driving IBS, functional dyspepsia, and gastroparesis, enabling precision neuromodulatory and microbiome-based intervention strategies grounded in each patient's specific enteric neurobiology.

05

Pharmacogenomics of GI Biologic & Immunomodulator Therapy

Building the pharmacogenomic evidence base for individualized GI biologic and immunomodulator protocol design — characterizing TPMT, NUDT15, CYP3A4, and TNF receptor pathway variants that predict thiopurine toxicity, biologic primary non-response, and immunomodulator adverse event risk, enabling PGx-guided IBD therapy selection and dosing protocols that optimize mucosal healing outcomes while eliminating genotype-predictable treatment complications before they occur.

Precision Gastroenterology Research · ABOPM

Decoding the Molecular Biology of Digestive Health and GI Disease

The precision gastroenterology revolution is not a future event — it is rewriting how digestive disease is assessed and treated today. Metagenomic microbiome profiling, IBD endotype stratification, mucosal transcriptomics, gut-brain axis neurobiology, and pharmacogenomic biologic optimization are actively transforming how every GI disease and digestive dysfunction is diagnosed, stratified, and therapeutically addressed at the molecular and individual patient level.

The ABOPM Precision Gastroenterology Department positions clinicians at the center of this transformation — equipping them with the molecular GI literacy, microbiome and mucosal immunology frameworks, and board-certified credentials to lead precision gastroenterology programs across every digestive disease presentation and gut health domain.

1 in 4

People globally affected by functional GI disorders

40%

Of IBD patients fail first-line biologic therapy

PGx

Guided biologic selection replacing empirical GI prescribing

Explore Blog Topics → Read clinical insights, case studies & precision gastroenterology updates on our blog

Precision Gastroenterology Department · ABOPM

Meet Our Leadership

Director of Precision Gastroenterology

Director

Precision Gastroenterology

Director of Precision Gastroenterology CEO · Progenabiome & Ventura Clinical Trials

Sabine Hazan-Steinberg, MD

Gastroenterologist · Microbiome Expert · Clinical Trial Leader · MD: University of Miami · Residency: Jackson Memorial Hospital · Fellowship: University of Florida

"Pioneering the intersection of microbiome science and precision gastroenterology — from whole genome sequencing of gut flora to FDA-approved clinical trials, decoding the molecular biology of the gut to transform how digestive disease is diagnosed, treated, and understood."

Dr. Sabine Hazan-Steinberg is a gastroenterologist, microbiome expert, clinical trial leader, author, and global speaker. She is the CEO of Progenabiome — a genetic sequencing research laboratory leading 35+ studies on the role of gut flora in disease — and CEO of Ventura Clinical Trials, where she brings 20+ years and over 300 clinical trials for pharmaceutical companies. She is also Co-founder of Topelia Therapeutics and the first woman accepted into the University of Florida as a Clinical Gastroenterology Fellow.

Dr. Hazan is the published author of Let's Talk Sh!t and Regenesis, and serves as Series Editor on the microbiome for Practical Gastroenterology — a peer-reviewed journal reaching 18,000 gastroenterologists. She has published in numerous prestigious medical journals and speaks at the World Congress of Digestive Disease, Microbiome Congress, MAGI, ILADS, TACA, and the International Drug Discovery Science and Technology Conference. Her lab became the first worldwide to detect SARS-CoV-2 from fecal samples by whole genome sequencing and identified a microbiome susceptibility marker for COVID-19. She also created The Malibu Microbiome Meeting and is pioneering familial fecal transplant research for autism.

300+

Clinical Trials Led

35+

Microbiome Studies Active

18K

GI Physicians Reached via Journal

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Faculty Members

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Genomics Department · ABOPM

Shaping the Future
of Precision Medicine

As precision medicine continues to evolve, genomics will play an increasingly central role in redefining how disease is understood, predicted, and treated at the molecular level.

The Genomics Department at ABOPM remains committed to advancing this field through scientific leadership, clinical innovation, and collaborative discovery. Together with our global community of physicians and researchers, we are helping shape the future of next-generation healthcare.

Explore Certification → Get Involved

Featured Insights

Insights Shaping
Precision Medicine

Explore ABOPM perspectives on genomics, multi-omics, systems thinking, clinical innovation, and the future of physician leadership in precision medicine.

Multi-Omics Clinical Innovation Precision Prevention Physician Leadership

Liquid Biopsy and Early Cancer Detection: Promise and Limitations

Liquid biopsy is transforming cancer detection through minimally invasive genomic testing, offering new opportunities for earlier diagnosis and monitoring. ...more

Precision Oncology

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Polygenic Risk Scores and the Genomic Data Gap: Promise, Limitations, and Equity in Precision Medicine

Polygenic risk scores may transform disease prediction, but gaps in genomic diversity continue to limit equity, accuracy, and access in precision medicine across global populations. ...more

Population Precision

May 26, 2026•9 min read

Artificial Intelligence in Precision Medicine

Artificial intelligence is reshaping precision medicine by improving diagnostics, predicting treatment response, and enabling more personalized, data-driven healthcare strategies. ...more

On the Frontier

May 20, 2026•9 min read