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 t

ests 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.

Symptoms alone can't tell you whether a DGBI patient has carbohydrate malabsorption — but a breath test can.A recent stu...
06/06/2026

Symptoms alone can't tell you whether a DGBI patient has carbohydrate malabsorption — but a breath test can.

A recent study and editorial in The American Journal of Gastroenterology prospectively followed 301 patients with disorders of gut–brain interaction (DGBI) and found that 59.1% met criteria for carbohydrate intolerance. On multivariable analysis, lactose malabsorption and fructose malabsorption measured on standardized breath tests were independently associated with higher IBS symptom scores, greater symptom burden, and lower quality of life.

That matters for how you build your DGBI workup:
Carbohydrate malabsorption belongs as a first-class diagnostic consideration alongside SIBO/IMO — not an afterthought.
Objective breath test results help distinguish malabsorption from intolerance and guide more targeted dietary recommendations.
Patients in the malabsorption-positive group carry a heavier overall burden of disease — identifying them earlier changes the clinical conversation.

CDI's Adult and Pediatric HMBT Programs are built to make this evidence usable in practice:
Comprehensive testing menu in one program → lactose, fructose, and sucrose malabsorption alongside SIBO/IMO, so one order covers the full functional GI differential.
1 business day turnaround after sample receipt → results arrive in time to shape the next step in care, not the next appointment.
Max $299 out-of-pocket cap → cost-related friction reduced so testing doesn't stall at the patient conversation.

Evidence confirms that standardized carbohydrate breath testing is clinically meaningful in DGBI. CDI's work is to make it easier to complete, faster to interpret, and simpler to integrate.

Full evidence spotlight here →
commdx.com/carbohydrate-malabsorption-breath-testing-evidence-spotlight/

06/03/2026

If breath testing feels clunky, it's not your team. It's the model.

Managing breath test orders, patient data, and results across scattered systems creates unnecessary friction — for staff and for patients. CDI's MyGI Gateway platform demo shows what a streamlined workflow actually looks like in practice.

What changes when the workflow is centralized:
🔵Order: Place breath test orders directly through MyGI Gateway — no separate system required.
🔵Track: Real-time updates and notifications keep you informed whether you're in the office or on the go.
🔵Result: Advanced analytics and intuitive reporting deliver actionable insights for SIBO, IMO, and carbohydrate malabsorption — all in one platform.

How CDI supports:
🔵MyGI Gateway centralized hub → less scattered data, fewer missed steps.
🔵Real-time notifications → faster awareness of order and result status.
🔵Secure team collaboration → everyone stays aligned on diagnostics and patient care.

See the full workflow we use with GI groups and hospital-affiliated clinics.

When the process feels simple and well guided, patients are far more likely to complete their at-home breath test.“This ...
06/02/2026

When the process feels simple and well guided, patients are far more likely to complete their at-home breath test.

“This was my first time using CDI at-home testing. I had some questions and their customer service was amazing. I called a couple of times and each time I received great customer service and the answers I was looking for. Everyone was polite and very helpful. Making sure I had the proper paperwork was needed. I was very pleased with the experience.”

When patients feel guided from the start, it reduces friction in the process and helps your team avoid unnecessary follow-up around paperwork, questions, or kit completion.

How CDI supports:
At-home collection that keeps testing convenient for patients.
Clear prep materials and instructions that help set expectations.
Dedicated patient support that helps answer questions before they slow the workflow.

If you’d like to see the materials patients receive from CDI, our team can walk you through the full experience.

05/29/2026

Breath testing works best when the process feels clear, safe, and easy to complete at home.
Patients can perform CDI’s tests in the comfort of their own home, which helps reduce anxiety compared with in-office testing.

The process is turnkey and straightforward, with instructions included in the kit and dedicated patient support available if questions come up.

That matters in practice because a simpler experience can lead to higher completion rates and fewer delays in the diagnostic workflow. It also helps reduce in-office aerosolization, which is another reason at-home testing has become a practical option for many GI practices.

How CDI supports:

🔵 At-home, non-invasive testing → more comfortable for patients.
🔵 Clear instructions and patient guides → easier completion.
🔵 Dedicated customer support → fewer barriers when questions arise.

Clear process → less anxiety → smoother testing.

Food-related symptoms are common, but they do not tell you whether you are dealing with allergy, intolerance, or malabso...
05/27/2026

Food-related symptoms are common, but they do not tell you whether you are dealing with allergy, intolerance, or malabsorption.

That distinction matters because food sensitivities are digestive-system responses, not immune-system responses, and the article notes that lactose, fructose, and sucrose intolerances are often better evaluated with breath testing than with trial-and-error elimination diets. The piece also points out that elimination diets and food diaries can be slower and less direct when the goal is to identify specific problem foods.

What changes in practice:
🔵 Use breath testing when carbohydrate malabsorption is part of the differential.
🔵 Reduce reliance on prolonged elimination-and-rechallenge workflows.
🔵 Give patients a clearer, more objective path than symptom tracking alone.

How CDI supports:
🔵 Non-invasive at-home hydrogen and methane breath testing → easier for patients, fewer barriers.

🔵 Testing for lactose, fructose, and sucrose malabsorption → supports targeted evaluation.

🔵 Faster results than diet diaries alone → helps practices move from uncertainty to action.

Clear testing → clearer triggers → more efficient GI workups.

Full workflow checklist here → https://f.mtr.cool/liazcddcas

When you remove the friction from the diagnostic process, your return ratios climb and your practice efficiency improves...
05/25/2026

When you remove the friction from the diagnostic process, your return ratios climb and your practice efficiency improves.

We often hear from patients that the simplicity of the test is what stood out most:

"The kit was promptly received in the mail. The directions were clear and straightforward. Returning the completed test kit was easy."
—Christopher Dunn Verified 5-Star Google Review

Every time a patient finds the process intuitive, you save your staff the time and effort of managing incomplete workups or re-issuing kits. A seamless patient experience isn't just about satisfaction—it's an operational necessity for high-performing GI practices.

CDI supports your practice with:

🔵Intuitive, at-home collection materials designed for clarity.

🔵Streamlined return processes that encourage patient follow-through.

🔵Proactive resources that answer patient questions before they become staff phone calls.

If you’d like to see the materials your patients receive from CDI, our team would be happy to walk you through the full experience.

Intestinal Methanogen Overgrowth (IMO) is often hidden behind IBS-C symptoms, making clinical diagnosis based on symptom...
05/22/2026

Intestinal Methanogen Overgrowth (IMO) is often hidden behind IBS-C symptoms, making clinical diagnosis based on symptoms alone inherently unreliable.

While methane is a known driver of constipation and slowed transit, the correlation between symptoms and methane production cannot be quantified without objective testing. A 2022 study highlighted the efficacy of methane breath testing, showing a fasting single methane measurement cutoff of ≥10 ppm can detect IMO with 86.4% sensitivity and 100% specificity, providing a clear biomarker to confirm presence and monitor treatment response.

What changes in your workup:
🔵 Incorporate methane breath testing for all patients presenting with constipation-predominant IBS symptoms.
🔵Use quantifiable methane levels to differentiate IMO from other functional GI disorders, allowing for targeted antibiotic or dietary interventions.
🔵 Monitor methane levels post-treatment to objectively assess efficacy and guide long-term management.

How CDI supports the IMO workup:
🔵 Hydrogen and methane breath testing → objective, guideline-endorsed diagnosis for IMO.
🔵 24-hour turnaround on results → faster transition from testing to targeted therapy.
🔵 MyGI Gateway status tracking → visibility into every patient’s diagnostic status, from kit distribution to final result.

Objective measurement → targeted intervention → clearer path to symptom relief.

Full clinical breakdown here → https://f.mtr.cool/zysingsqkg

Patient cost anxiety can slow down testing before it even starts.The Breath Test Timer is part of a broader CDI approach...
05/20/2026

Patient cost anxiety can slow down testing before it even starts.

The Breath Test Timer is part of a broader CDI approach that aims to make the process easier to understand, from preparation through result delivery. When practices can confidently explain what happens next, patients are more likely to move forward without hesitation.

What changes in practice:
🔵 Front-desk and clinical staff have a clearer workflow to explain.
🔵 Patients get less uncertainty around the test-taking process.
🔵 Operational clarity helps reduce back-and-forth before collection.

How CDI supports:
🔵 At-home, non-invasive testing → less friction for patients.
🔵 Clear prep support → fewer collection errors.
🔵 MyGI Gateway visibility → less chasing and more confidence in follow-through.

Simple process → fewer questions → smoother patient completion.

Explore the Breath Test Timer as a practical tool for patients → https://f.mtr.cool/rvslhmaznj

IBS, IBD, and SIBO share enough symptoms that even experienced clinicians pause at the chart.Abdominal pain, bloating, c...
05/18/2026

IBS, IBD, and SIBO share enough symptoms that even experienced clinicians pause at the chart.

Abdominal pain, bloating, constipation, and diarrhea appear across all three conditions — and research has found that SIBO is often present in patients already diagnosed with IBD, and may actually be the root cause of IBS in a meaningful subset of patients. When conditions co-exist, treating one without identifying the other leaves the clinical picture incomplete.

What changes in your diagnostic approach:

🔵 SIBO cannot be confirmed or ruled out by symptoms or exclusion criteria alone — a hydrogen and methane breath test is required per the North American Consensus on Breath Testing

🔵 IBS diagnosis relies on Rome IV criteria and exclusion of other conditions — but without a SIBO breath test in the workup, a concurrent bacterial overgrowth may go undetected

🔵 IBD diagnosis requires invasive procedures — but SIBO testing is non-invasive and can run in parallel without adding procedural burden

How CDI supports the differential workup:

🔵 Hydrogen and methane breath testing for SIBO and IMO → objective data alongside your clinical criteria

🔵 At-home, non-invasive collection → can be ordered while IBD or IBS workup is already underway

🔵 Results within one business day → no delays in a diagnostic process that is already complex

When three conditions look alike on paper, objective testing is what separates them in practice.

Full clinical breakdown here → commdx.com/ibs-ibd-and-sibo-diagnosing-and-deciphering-the-differences/

05/15/2026

When a practice integrates breath testing, the clinical decision to order is only the first step. What happens between order and result determines whether that decision produces anything useful.

Most breath testing friction is not clinical — it is operational. Kits that are not registered. Results that take too long to arrive. Staff fielding billing questions they cannot answer. Each gap adds time between a patient's symptoms and a clinician's next decision.

What a well-structured breath testing program removes from your workflow:

🔵 Unclear result turnaround → CDI delivers results within one business day of receipt, directly to your portal — no follow-up calls required
🔵 Decentralized data → MyGI Gateway provides centralized access to all kitsstatuses and result status in one platform, free for providers and patients
🔵 Staff time on compliance and billing questions → CDI's dedicated service team handles ordering, prep, insurance inquiries, and result interpretation directly

Three qualities worth evaluating in any breath testing program:
🔵 Accuracy standards — CDI tests adhere to ISO 13485 and FDA registration standards
🔵 Population coverage — SIBO, IMO, and carbohydrate malabsorption testing for both adult and pediatric patients
🔵 Operational support — not just a kit, but a program with a team behind it

The right program makes breath testing easier to order, complete, and act on.

Full program overview → commdx.com/adult-gi-breath-testing/

Address

Salem, MA

Opening Hours

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

Telephone

+18882585966

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