Your gut has been trying to tell you something. We know how to listen.
Advanced gut diagnostics in a private concierge studio — a precise, beautifully presented profile of how your interior actually functions.
I know what I need. I'm ready to begin.
Select a diagnostic profile and submit your request. Your clinical team will confirm within one business day.
The science was always there. We brought it to you.
The same clinically validated assessments used in advanced gastroenterology — now delivered in a private studio setting designed entirely around you. Unhurried, concierge-led, and focused on producing a picture of your gut that is precise, personal, and beautifully presented.
Each engagement begins with a thorough intake. The assessments we deploy are selected based on what your body is specifically telling us — not a standard protocol. What you receive at the end is a profile of your interior biology that belongs entirely to you.
Some of what we deploy — and why it matters.
Every assessment is cutting-edge, clinically validated, and drawn from the same tools used in advanced academic gastroenterology. Which we deploy for you — and in what combination — is determined during intake.
Measures the specific gases produced by bacterial fermentation — distinguishing hydrogen-dominant, methane-dominant, and mixed presentations that respond to very different approaches.
Identifies precisely which substrates your system processes sub-optimally and at what threshold — using the same reusable clinical device, generating comparable data over time.
Tracks the complete arc of your digestive rhythm from ingestion to exit — distinguishing presentations that look identical on the surface but require fundamentally different approaches.
Maps muscular mechanics in real time — capturing pressure events that imaging and breath testing cannot see. Often where answers live for presentations that standard workup has failed to explain.
From first visit to The Reveal.
A licensed clinician takes the time to understand your complete picture — your history, your patterns, what you've already tried. Your assessment protocol is built specifically from this conversation, not a standard checklist.
Your assessments are performed in our private Boca Raton studio in a single, unhurried visit. Quiet, considered, and entirely yours. Remote assessments available via supervised home kit with live guidance.
Your results are compiled into a beautifully designed personal profile — precise, clearly written, permanently yours. Share it with any specialist, use it to inform how you eat and live, or simply sit with the clarity of finally knowing.
A complete picture of how your gut actually functions.
The Reveal is a precision-designed profile of your interior biology — presented in language that makes sense the moment you read it, and formatted with the care this kind of data deserves.
It captures your fermentation patterns, your transit data, your enzymatic thresholds — everything your body has been expressing, finally translated into something clear and actionable.
What a typical engagement looks like.
The following reflects the most common profiles we develop. Your actual assessment is determined during intake — your clinician selects the diagnostics that give the most complete picture of your specific presentation.
A note on how this works: We don't offer a fixed menu. After your intake consultation, your clinical team recommends the profile that gives the most complete picture of what your body is telling us. Pricing shown reflects starting engagements — your final protocol is determined during intake based on your specific presentation. GI Diagnostics is a private-pay practice; many clients submit itemized receipts to their carrier for possible reimbursement.
Microbial Clarity.
For the person who suspects their gut — and wants answers, not guesses. Bloating, distension, food intolerance, and IBS-pattern symptoms that haven't responded to diet alone.
Key Diagnostics- Lactulose breath test · hydrogen & methane tracing (Rome IV criteria)
- Fructose & lactose malabsorption panels
- SIBO quantification with time-to-peak analysis
The Full Picture.
For those who want to understand their gut completely, not just manage it. Unexplained symptoms, multiple failed protocols, or a readiness to move from symptom relief to system-level clarity.
Key Diagnostics- Complete breath panel + whole-gut transit assessment (wireless motility study)
- Regional transit mapping: gastric, small bowel, colonic
- Integrated fermentation pattern + enzymatic function with dietary correlation
Structural. Mechanical. Definitive.
For complex or long-standing presentations where anatomy and mechanics are the missing piece. Dysphagia, refractory reflux, evacuation disorders, or post-surgical GI dysfunction.
What It Includes- Wearable motility assessment — continuous, ambulatory data across your natural daily pattern
- Structural evaluation selected based on your specific presentation and symptom history
- Longitudinal retesting of key parameters where clinically indicated
Gastroenterology-grade science, in a setting built for the person — not the system.
GI Diagnostics was founded by board-certified gastroenterologists with a clear intention: to bring the most informative gut assessments in medicine into a setting that feels as considered as the science behind them.
A private studio where your licensed clinical team conducts every intake personally, deploys the cutting-edge diagnostics most relevant to your presentation, and delivers a report that belongs entirely to you.
Dr. Nathanson is a physician-scientist whose career has centered on one question: what is the gut actually doing, and how do we measure it with precision? As Director of the NIH-funded Yale Liver Center and former Chief of Digestive Diseases at Yale School of Medicine, he has spent decades translating complex biological research into clinical standards — and defining what rigorous GI medicine looks like in practice.
GI Diagnostics was built on a single conviction: the diagnostic rigor of academic gastroenterology does not belong only in a hospital. Every assessment deployed here, every protocol selected, every Reveal produced reflects a framework developed and verified to the standards of the NIH and the world's leading GI research institutions.
- Director, NIH-Funded Yale Liver Center
- Former Chief, Digestive Diseases · Yale School of Medicine
- Editor-in-Chief, Hepatology
- MD, PhD
Janylet's clinical foundation was built in one of the most demanding environments in medicine: organ transplant coordination at Yale New Haven Health, where diagnostic precision is not a preference — it is the only acceptable standard. As a Certified Clinical Transplant Coordinator, she managed the full clinical arc of the most complex biological presentations in modern medicine.
At GI Diagnostics, she leads every client engagement from intake through Reveal. Her background in high-acuity care coordination is, in practice, a background in not letting anything go unnoticed.
- Advanced Practice Registered Nurse, CCTC
- Yale New Haven Health · Transplant Clinical Operations
- Co-Founder, Spanish New Patient Clinic
- Recognized for Excellence in Patient Advocacy
All assessments are overseen by licensed clinicians. Information is provided for wellness and educational purposes and does not constitute a clinical diagnosis or establish a physician-client relationship.
If you've done the research and still don't have a clear answer — you're exactly who we built this for.
The following are among the most common presentations we see. Each has a measurable, data-driven explanation that standard workup frequently misses.
"I came in with years of questions and a folder of bloodwork that hadn't given me answers. I left with a precise picture of exactly what was happening — and for the first time, it all made sense."
"Every other test I'd had was inconclusive. The SIBO analysis here was the first result that actually explained what my body had been doing for three years. The report was beautiful, clear, and completely changed my approach."
"The level of attention during the intake alone was unlike anything I'd experienced in a medical setting. They listened, asked the right questions, and designed a protocol that was clearly built for me — not a template."
The gut is where better begins — and it is only the beginning.
GI Diagnostics is designed as a complete precision wellness destination. Your initial profile is the foundation. For many, the relationship continues — targeted intravenous infusions to support and accelerate recovery, ongoing monitoring of key parameters, and periodic reassessment to track how your interior evolves over time.
What to know before you reach out.
We are a private-pay practice. Many clients submit itemized receipts to their insurance for possible reimbursement, and we are happy to provide documentation to support that process. We do not bill insurance directly.
A licensed clinician — a physician or nurse practitioner — takes the time to understand your complete history: symptoms, patterns, prior testing, and what you've already tried. Your assessment protocol is built specifically from that conversation. No preset packages, no standard panels.
Most assessments are completed in a single studio visit of two to four hours. Breath protocols require a fasted state and take approximately three hours. The wireless transit study spans several days as the capsule moves through your system — no additional clinic time is required during that period.
Yes — specific protocols vary by assessment. Breath testing requires dietary restrictions and a fasting period beforehand. Your clinical team will provide a detailed preparation guide well in advance of your studio visit.
Your Reveal — a precision-designed personal profile — is delivered digitally, typically within one to two weeks of your assessment. It includes all findings, visual data representations, and plain-language interpretation. A downloadable PDF is yours permanently.
Yes — that is precisely the intention. Your report is formatted to be immediately legible to any specialist. We also offer coordination with outside specialists on request, and your clinical team is available to speak directly with your physician if that would be useful.
