10 Best Gastroenterology Billing Companies in the USA
A GI practice runs high procedure volume, and each claim needs coding precise enough to reflect exactly what happened a colonoscopy that starts as screening and becomes diagnostic mid-scope, a biopsy in the same session, modifiers that vary by payer. Generic billing teams handle this inconsistently, not from carelessness, but because it isn't what they do daily.
This guide compares 10 gastroenterology billing companies, explains what separates a strong GI vendor from a generalist, and offers a framework for evaluating options.
Editor's Picks: 10 Gastroenterology Billing Companies
Rank | Company | Best For | Key Strength |
1 | Sirius Solutions Global | GI & multi-specialty practices wanting hands-on RCM | AI-assisted claim scrubbing + human-verified review |
2 | Nexus io | Practices wanting a GI-focused boutique vendor | GI-specific coding and denial workflows |
3 | MBW RCM | Practices concerned about modifier-driven denials | Focus on modifiers 51, 59, and XS in GI claims |
4 | Medical Billers and Coders (MBC) | Practices wanting AAPC-certified GI coding depth | Colonoscopy conversion coding (screening/diagnostic/therapeutic) |
5 | BSI Medical Billing | Practices wanting a long-tenured vendor | Decades of GI-specific billing and credentialing experience |
6 | MedCare MSO | Practices wanting billing plus proprietary software | Combined RCM platform and outsourced billing team |
7 | ModMed (gMed) | Practices wanting an EHR + RCM platform built for GI | GI-specific EHR integrated with billing workflows |
8 | Coronis Health | Practices wanting a specialty-focused RCM enterprise | Specialty-specific coding and analytics at scale |
9 | Practolytics | Multi-specialty practices including GI | Broad specialty coverage with GI billing experience |
10 | Flatworld Solutions | Practices wanting a large BPO with GI service lines | Scale and broad back-office billing support |
Sirius Solutions Global is featured first as this article's publisher; the rest reflects research into publicly available information, not a third-party ranking.
What Makes a Great Gastroenterology Billing Company?
Evaluate any vendor against these criteria:
● Gastroenterology-specific billing experience
● Coding expertise, particularly screening-to-diagnostic conversion and modifier accuracy
● A defined denial management process, not just resubmission
● Active A/R management
● Eligibility verification before the procedure
● Prior authorization support
● Claim scrubbing before submission
● Transparent, regular reporting
● Technology integration with your EHR/PM system
● Pricing and contract flexibility
Is your GI practice losing revenue to preventable billing issues? Request a Revenue Cycle Review → https://www.siriussolutionsglobal.com/register-now |
10 Gastroenterology Billing Companies
1. Sirius Solutions Global
Sirius Solutions Global provides gastroenterology billing and revenue cycle management, pairing AI-assisted claim scrubbing with human review of denials, modifiers, and payer correspondence.
● Best for: GI and multi-specialty practices wanting a billing partner where actual staff review complex claims, not automation alone.
● Primary strengths: AI-assisted workflows combined with human-verified review, eligibility verification, coding, denial management, prior authorization, and credentialing.
● Potential consideration: Confirm current experience with your specific payer mix and GI procedure volume.
● Why GI practices may consider them: A team that treats technology as a first pass, not the final word, on claims that need judgment — like screening-to-diagnostic colonoscopy conversion.
2. Nexus io
Founded in 2015 and based in Phoenix, Nexus io focuses specifically on gastroenterology billing, combining AI-assisted claim review with AAPC-certified GI coding.
● Best for: Practices wanting a boutique vendor built specifically around GI billing.
● Primary strengths: GI-specific coding workflows and claims-cleaning technology.
● Potential consideration: As a smaller, specialty-focused vendor, confirm capacity for higher claim volumes.
● Why GI practices may consider them: A narrower focus that may translate into deeper GI-specific expertise than a generalist vendor.
3. MBW RCM
MBW RCM concentrates on the modifier and coding complexities specific to gastroenterology, including the screening-versus-diagnostic distinction that drives a large share of GI payer disputes.
● Best for: Practices with recurring modifier-related denials.
● Primary strengths: Deep focus on modifiers 51, 59, and XS in gastroenterology claims.
● Potential consideration: Confirm current performance data directly rather than relying on published figures.
● Why GI practices may consider them: Specific expertise in the exact denial category that trips up many GI claims.
4. Medical Billers and Coders (MBC)
MBC provides AAPC-certified coding built around reviewing GI operative reports line by line to confirm correct CPT selection for colonoscopy procedures.
● Best for: Practices wanting certified coders reviewing every operative report against the claim.
● Primary strengths: Colonoscopy conversion coding and add-on code capture for bundled procedures.
● Potential consideration: Ask for GI-specific references and current clean claim data, not just general company metrics.
● Why GI practices may consider them: A coding-first approach specifically built around the highest-risk GI coding decision.
5. BSI Medical Billing
BSI Medical Billing has provided gastroenterology billing services for several decades, covering credentialing, coding, and A/R management.
● Best for: Practices wanting a long-tenured vendor with institutional GI billing knowledge.
● Primary strengths: Decades of specialty-specific billing experience and credentialing support.
● Potential consideration: Confirm current technology stack, since longevity doesn't guarantee modern tooling.
● Why GI practices may consider them: An established operating history specifically in gastroenterology billing.
6. MedCare MSO
MedCare MSO pairs proprietary billing software with an outsourced RCM team, covering credentialing, coding, and compliance review.
● Best for: Practices wanting billing services and software from one vendor.
● Primary strengths: Combined platform-plus-service model built for GI billing codes.
● Potential consideration: Confirm integration if you already use a different PM system.
● Why GI practices may consider them: One vendor covering both the technology and the billing staff.
7. ModMed (gMed)
ModMed's gMed platform is an EHR built specifically for gastroenterology, with RCM functionality integrated directly into the clinical workflow.
● Best for: Practices wanting billing tightly integrated with a GI-specific EHR.
● Primary strengths: Purpose-built GI clinical and billing workflow in one system.
● Potential consideration: Requires adopting the gMed platform — a bigger commitment than a billing-only vendor.
● Why GI practices may consider them: Reduces the gap between documentation and billing by keeping both in the same system.
8. Coronis Health
Coronis Health provides specialty-specific RCM at enterprise scale, with coding and analytics tailored to specialties including gastroenterology.
● Best for: Larger GI groups wanting enterprise-level RCM infrastructure.
● Primary strengths: Specialty coding depth paired with broader analytics.
● Potential consideration: Built for larger practices — confirm fit if you're a smaller group.
● Why GI practices may consider them: Specialty coding resources backed by a larger RCM organization.
9. Practolytics
Practolytics serves hospitals, multispecialty clinics, and solo practitioners with coding, billing, and compliance support including GI.
● Best for: Multi-specialty practices that include GI among several service lines.
● Primary strengths: Broad specialty coverage alongside stated GI billing experience.
● Potential consideration: Confirm GI-specific depth versus its broader multispecialty focus.
● Why GI practices may consider them: One vendor covering GI alongside a group's other specialties.
10. Flatworld Solutions
Flatworld Solutions is a large BPO offering gastroenterology billing within a broader healthcare back-office service line.
● Best for: Practices wanting a large BPO with GI billing among several service lines.
● Primary strengths: Scale, automation, and back-office support beyond billing.
● Potential consideration: Confirm dedicated GI staffing versus general billing applied to GI claims.
● Why GI practices may consider them: Useful if you want billing bundled with other administrative outsourcing.
Gastroenterology Billing Services to Look For
● Eligibility verification — confirming benefits before the procedure prevents avoidable claim and patient-responsibility issues.
● Medical coding — accurate procedure and diagnosis coding is the foundation of a clean claim.
● Claim scrubbing — pre-submission review catches errors before a payer ever sees the claim.
● Denial management — identifying denial patterns prevents the same revenue loss from recurring.
● A/R management — aging accounts lose recovery value the longer they sit unworked.
● Prior authorization — missing authorization is one of the most avoidable denial categories.
● Credentialing — payer enrollment gaps can quietly stall a new provider's ability to bill at all.
● Billing audits — periodic review surfaces workflow and revenue leakage that daily processing misses.
Where Gastroenterology Revenue Leaks
Documentation → Coding → Claim → Adjudication → Payment → A/R — a weak link anywhere in that chain shows up as delayed or lost revenue somewhere downstream.
Challenge | Potential Impact | What a Billing Partner Should Do |
Coding errors | Claim delays or denials | Pre-submission coding review against the operative report |
Eligibility issues | Rejected claims, patient balance disputes | Verify coverage before the procedure |
Authorization gaps | Non-payment risk | Track authorization requirements before scheduling |
Denials | Lost or delayed reimbursement | Analyze root cause, then appeal or correct |
Aging A/R | Cash-flow pressure | Prioritized, scheduled follow-up |
Underpayments | Quiet revenue leakage | Payment variance analysis against contracted rates |
How to Choose the Right Company
● Step 1 — Review specialty experience specific to gastroenterology, not general medical billing.
● Step 2 — Ask about coding expertise, especially colonoscopy conversion and modifier logic.
● Step 3 — Understand their denial workflow, including root-cause analysis.
● Step 4 — Review sample reporting before signing anything.
● Step 5 — Ask about technology and EHR/PM compatibility.
● Step 6 — Understand the full pricing structure, not just the headline rate.
● Step 7 — Review contract terms and exit conditions.
● Step 8 — Request a billing assessment before committing.
Not sure where your current billing workflow stands? Talk With Sirius Solutions Global → https://www.siriussolutionsglobal.com/register-now |
Questions to Ask Before Hiring a Billing Company
● How much gastroenterology billing experience do you have specifically?
● Who handles coding, and are they certified?
● How are denials monitored and categorized?
● How frequently is A/R followed up?
● What reports will our practice actually receive?
● How do you identify underpayments against contracted rates?
● How is eligibility verification handled?
● Do you support prior authorization directly?
● What technology integrates with our current workflow?
● Is there a long-term contract, and what are the exit terms?
● How is pricing calculated?
● Who will be our primary point of contact?
Why Specialized GI Billing Matters
Treating GI billing as generic billing shows up downstream as recurring denials or quiet underpayments — a documentation gap becomes a coding error, then a denial, then aging A/R. Specialty knowledge at the front of that chain prevents most of what surfaces as a billing problem weeks later.
Frequently Asked Questions
Q: What does a gastroenterology billing company do?
It manages some or all of the revenue cycle for GI-specific services — coding, claim submission, eligibility, prior authorization, denial management, and A/R follow-up.
Q: Why should gastroenterology practices use a specialized billing company?
GI claims involve procedure combinations, modifier logic, and screening-to-diagnostic coding distinctions that generalist billing teams don't encounter as often, increasing denial risk.
Q: What services should a GI billing company provide?
At minimum: eligibility verification, coding, claim scrubbing, submission, denial management, A/R follow-up, and transparent reporting — with credentialing and prior authorization support ideally included.
Q: How can billing companies help reduce denials?
By verifying eligibility and authorization before the procedure, reviewing coding against documentation, and analyzing denial patterns for root cause instead of just resubmitting.
Q: What should a GI practice look for when choosing a billing company?
Specialty-specific experience, certified coding staff, a defined denial process, transparent reporting, and clear pricing and contract terms.
Q: How does A/R management affect gastroenterology revenue?
Aging A/R represents revenue already earned but not yet collected — the longer it sits, the more likely it runs into timely filing or appeal deadlines that make recovery harder.
Q: How much does gastroenterology medical billing cost?
Pricing varies by claim volume, service scope, and pricing model (percentage of collections, flat fee, or per-claim). Request a quote based on your specific practice profile.
Q: Is outsourcing gastroenterology billing worth it?
It depends on your current denial rate, A/R performance, and internal staffing. Practices with recurring bottlenecks or limited coding expertise often see the clearest value.
You Focus on Patient Care. We'll Handle the Rest.
Your practice should spend more time treating patients and less time chasing claims. A focused revenue cycle review can help identify where coding, eligibility, denials, or A/R follow-up may be costing your GI practice revenue it already earned.
Editorial Note
This is an editorial comparison based on publicly available company information, not an official industry ranking. Sirius Solutions Global is featured first as the publisher of this article; company details, services, and pricing can change, so verify current information directly with each company before making a decision. This article does not constitute legal, financial, or coding advice — coding and reimbursement depend on documentation, payer policy, and applicable coding guidelines.
