Commonwealth Diagnostics International

Commonwealth Diagnostics International CDI offers products and services that aid the diagnosis of small intestinal bacterial overgrowth (SIBO) and irritable bowel syndrome (IBS).

Founded in 2015 in Salem, Mass., and operating out of its CLIA-certified laboratory and as an FDA-registered, ISO 13485-certified medical device manufacturer, Commonwealth Diagnostics International (CDI) helps providers identify and diagnose common sources of digestive distress and functional gastrointestinal ailments. CDI’s expansive portfolio of non-invasive at-home hydrogen and methane breath tests supports the diagnosis and treatment of Small Intestinal Bacterial Overgrowth (SIBO) and Intestinal Methanogen Overgrowth (IMO), as well as fructose malabsorption, lactose malabsorption, and sucrose malabsorption. Focused on patient-centric principles, CDI breath tests are easy-to-use, quick, and safe for patients and support meaningful GI health outcomes by helping steer each practitioner’s approach to dietary modification, homeopathic remedies, nutritional supplementation, immune support, high-quality probiotics, and additional testing.

📸 Live from in Phoenix!The CDI team is on-site at Booth 1108, meeting with GI professionals and demonstrating how our ...
10/28/2025

📸 Live from in Phoenix!

The CDI team is on-site at Booth 1108, meeting with GI professionals and demonstrating how our lab-first model elevates diagnostic accuracy.

✅ SIBO/IMO + carb malabsorption insights
✅ Hands-on breath test demos
✅ Practice tools you can use right away

Whether you're optimizing your diagnostic workflow or exploring at-home testing, stop by and see Breath Testing Done Right in action.

📍 Booth 1108 | Phoenix, AZ

🔗 Learn more: commdx.com

Retesting with Purpose (Test-of-Cure)After SIBO/IMO therapy, a timed retest can confirm response and guide next steps. W...
10/28/2025

Retesting with Purpose (Test-of-Cure)

After SIBO/IMO therapy, a timed retest can confirm response and guide next steps. Work with your clinician on appropriate washout (e.g., off antibiotics/probiotics per guidance) and use CDI’s standardized protocol for apples-to-apples comparison.

🔗 How to plan retesting: commdx.com

10/24/2025

🎙️ Modern Gastro Podcast | A Chat with Tamara Duker Freuman, MS RD

“IBS can take so much from people—their comfort traveling, dating, even eating out. When you give patients the right tools and symptom control, it truly gives them their life back.”

In our latest episode, host Craig S. Strasnick (CDI President & CEO) sits down with America’s trusted digestive nutrition expert, Tamara Duker Freuman (New York Gastroenterology Associates), to unpack the real-world toll of IBS and irregularity—and the power of personalized care to change that trajectory.

’llLearn

• Why quality of life—not just symptom counts—should guide strategy

• How tailored interventions (targeted fiber types/prep, meal timing, hydration, motility support, pelvic floor therapy) outperform one-size-fits-all advice

• The role of validated diagnostics (hydrogen & methane breath testing) in distinguishing SIBO/IMO from carbohydrate malabsorption—so treatment isn’t guess-and-check

• Practical nutrition frameworks Tamara uses to help patients feel safe eating—and socializing—again



IBS and irregularity don’t just live in the GI tract; they reshape daily decisions. A precision approach—combining dietetics, behavioral tools, and the right diagnostics—can restore confidence, freedom, and joy.

🎧 Watch/listen on the CDI website and social channels: https://commdx.com/digestive-mysteries/

🔗 Learn more: commdx.com

🌵 See you at in Phoenix! 🌵Commonwealth Diagnostics International (CDI) is exhibiting at the American College of Gastro...
10/22/2025

🌵 See you at in Phoenix! 🌵
Commonwealth Diagnostics International (CDI) is exhibiting at the American College of Gastroenterology Annual Scientific Meeting, Oct 24–29 — come meet us at Booth #1108.

What you’ll find at our booth:

🔬 Breath Testing Done Right: Hydrogen + methane testing aligned with North American Consensus & ACG guidance

🧪 Live walk-throughs: Vial-based collection (no bags), CO₂ correction, and sample-stability safeguards

📈 Clinical utility: How precise timing & interval sampling improve SIBO/IMO and carb-malabsorption detection

⚙️ Lab rigor: GC dual-detector analytics, NIST-traceable calibration, ISO-certified processes

👥 Practice enablement: Ordering options, turnaround times, EMR-friendly reporting, and patient prep resources

Whether you’re optimizing your diagnostic pathway or looking to streamline at-home testing, our team will share protocols, case examples, and practical tips you can use on Monday morning.

📍 Booth #1108 | Phoenix, AZ | Oct 24–29
🔗 Conference details: https://acgmeetings.gi.org/

🔗 Learn about CDI: commdx.com

Want to reserve time with us at the show? Drop a comment or DM, and we’ll book a slot. See you in Phoenix! 🌞

Myth: “Patients Must Stop All Meds Before Testing.”Fact: Only certain agents (e.g., antibiotics, some probiotics, some l...
10/21/2025

Myth: “Patients Must Stop All Meds Before Testing.”

Fact: Only certain agents (e.g., antibiotics, some probiotics, some laxatives) typically need adjustments; many meds do not. Always follow the clinician’s plan and CDI’s prep guide—avoid blanket discontinuation.
🔗 Prep resources: commdx.com

10/16/2025

Which topic should we publish next for clinicians?

A) Mixed H₂/CH₄ curves & constipation
B) High baselines: retest vs. proceed?
C) “Dual peaks”: small bowel vs. colon
D) Glucose vs. lactulose: decision tree

Your vote guides our next clinical brief.

🔗 Catch past resources: commdx.com

🌟 Patient Spotlight: “Smooth, clear, and well-communicated.” – Skip B. 🌟Nothing makes us prouder than hearing from patie...
10/13/2025

🌟 Patient Spotlight: “Smooth, clear, and well-communicated.” – Skip B. 🌟

Nothing makes us prouder than hearing from patients who felt supported at every step. Skip B. shared that CDI’s at-home breath test was “very smooth,” with “clear, easy-to-follow instructions,” and appreciated timely updates when the kit was received and when results were sent to the provider.

What Skip experienced is exactly what we aim to deliver every time:
✅ Simple, at-home collection with step-by-step guidance
✅ Proactive communication (kit received ➝ results delivered)
✅ Fast, clinically actionable results for you and your care team

Whether you’re evaluating SIBO, IMO, or carbohydrate malabsorption, we pair convenience with clinical rigor—that’s .

💙 Thank you, Skip, for trusting CDI!

🔗 Ready to learn more or start your test? Visit commdx.com

🌐 New on the CDI Blog: Why Symptoms Alone Aren’t EnoughBloating, pain, constipation, diarrhea—common symptoms, very diff...
10/10/2025

🌐 New on the CDI Blog: Why Symptoms Alone Aren’t Enough

Bloating, pain, constipation, diarrhea—common symptoms, very different causes. Our latest post breaks down why a “treat-the-symptom” approach often misses the mark in functional GI care, and how hydrogen & methane breath testing adds the objective data clinicians need.

What you’ll learn

Symptom overlap is real: IBS, SIBO, IMO, and carbohydrate malabsorption can look identical at the surface—objective testing separates them.

Why hydrogen and methane matter: Detecting both gases improves accuracy, especially for methane-dominant cases linked to constipation (IMO).

Timing = diagnostic clarity: Guideline-aligned sampling every 15–20 minutes over 2.5–3 hours reduces false positives/negatives.

From data to decisions: How breath test patterns inform diet (targeted carbs—not blanket restriction), motility support, and follow-up strategy.

Patient impact: Faster answers, fewer trial-and-error cycles, and more personalized care plans.

How CDI does Breath Testing Done Right

GC-based analysis with dual detectors for precise H₂/CH₄/CO₂ quantification

North American Consensus & ACG–aligned protocols

Vial-based collection & verified stability to protect sample integrity

Clear, actionable reports that slot into clinic workflows

Read the full post and see how objective testing upgrades outcomes for both patients and providers:
🔗 https://commdx.com/why-symptoms-alone-arent-enough-the-critical-role-of-breath-testing-in-functional-gi-diagnostics/

🌟 Client Spotlight: Stacey L’s At-Home Testing Experience 🌟“Everything I needed was included, the instructions were clea...
09/29/2025

🌟 Client Spotlight: Stacey L’s At-Home Testing Experience 🌟

“Everything I needed was included, the instructions were clear and easy to follow, and I got my results a week after mailing the test. I’m very pleased with the service.”

Even though Stacey’s kit took a bit longer to arrive, once it did, the process was seamless—and fast:

✅ Clear, step-by-step instructions
✅ All materials included in the box
✅ Simple vial collection every 15–20 minutes
✅ Results delivered to her provider ~1 week after mailing

At Commonwealth Diagnostics International (CDI), we’re committed to making accurate, at-home hydrogen & methane breath testing straightforward for patients and actionable for providers.

Ready for answers about SIBO, IMO, or carb malabsorption? Learn more: commdx.com

09/26/2025

🌟 Functional Friday — Modern Gastro Podcast, Ep. 2 🌟
Shared Decisions > One-Size-Fits-All: When Patients Help Pick the Path, Outcomes Improve
“If a patient deems a therapy non-viable, it’s non-viable—full stop. We move on. And efficacy is higher when patients are involved in decision-making… as long as there’s a foundation of honesty.” — Episode 2
Why this matters
Therapy fit trumps therapy force. When a plan doesn’t fit a patient’s life, adherence drops and outcomes suffer.

More options = more wins. The growing toolbox (dietary strategies, behavioral therapies, targeted meds, motility work, validated diagnostics) means you can pivot quickly without losing momentum.

Honesty is clinical data. Transparent symptom reporting and prep adherence are as important as the test itself.

Where CDI helps the shared-decision process
Clear, validated inputs: Hydrogen + methane breath tests (North American Consensus & ACG-aligned; 15–20-min intervals over 2.5–3 hrs) provide objective data to co-author a plan with your patient.

Prep made practical: Step-by-step instructions, reminders, and fast TAT reduce friction—so patients can say “yes” (and stick with it).

Actionable reporting: Results map to SIBO, IMO, and carb malabsorption patterns—supporting tailored dietary, motility, or behavioral options your patient can choose from.

👂 Pro tip for providers: Open each visit with, “Which of these options feels most doable for you over the next 4–6 weeks?” Then align testing, nutrition, and mind–gut tools to that choice.
🎧 Catch Episode 2 for more on building flexible, patient-centered GI care—and why shared decisions improve efficacy.
🔗 Learn how CDI delivers Breath Testing Done Right: https://commdx.com

09/22/2025

What’s the biggest bottleneck between ordering a breath test and starting treatment?

A) Waiting for results
B) Interpreting borderline curves
C) Coordinating diet changes
D) Insurance/authorization

👇 Vote + comment why. We’ll share practical fixes and tools you can use next week.

🔗 Resources: commdx.com

09/20/2025

🌟 Functional Friday — Modern Gastro Podcast, Ep. 2 🌟
Guest Spotlight: Dr. Nitin Ahuja on Precision, Phenotypes & the Future of GI Care

“Precision—starting with how we define conditions—matters. Then leverage big data to answer thorny questions and characterize true phenotypes rigorously.” — Dr. Nitin Ahuja

Why this moves GI forward

Sharper definitions → better trials: Refining diagnostic terminology reduces heterogeneity and noise in research and practice.

Phenotyping with data at scale: Linking symptoms, physiology, and outcomes enables targeted pathways—not one-size-fits-all.

From labels to personalization: The future is matching the right patient to the right intervention at the right time.

Where CDI fits

Personalized care starts with clean inputs.
Commonwealth Diagnostics International (CDI) provides hydrogen & methane breath testing aligned with North American Consensus & ACG guidance (15–20 min intervals over 2.5–3 hrs). That standardization supports:

Reliable phenotyping: Distinguish small-intestinal vs. colonic fermentation patterns for SIBO/IMO and carb malabsorption.

Actionable decisions: Pair results with diet (e.g., low-FODMAP under a GI RD), motility strategies, and mind–gut therapies.

Research-ready data: Consistent protocols enable apples-to-apples comparisons across cohorts.

🎧 Dive into Ep. 2 to hear Dr. Ahuja on precision language, big-data phenotyping, and what’s next for truly individualized GI care.

🔗 Learn how CDI delivers Breath Testing Done Right: commdx.com

Address

Salem, MA

Opening Hours

Monday 9am - 5pm
Tuesday 9am - 5pm
Wednesday 9am - 5pm
Thursday 9am - 5pm
Friday 9am - 5pm

Telephone

+18882585966

Website

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