Top 10 Gastroenterology Billing Companies (2026)

Here are the Top 10 Gastroenterology Billing Companies (2026):

1. Medical Billers and Coders (MBC)
2. Athenahealth
3. Transcure
4. GeBBS Healthcare Solutions
5. Coronis Health
6. R1 RCM
7. AdvancedMD
8. CareCloud
9. Kareo / Tebra
10. Greenway Health

Why Gastroenterology Billing Is a High-Risk Specialty for Revenue Leakage

Gastroenterology billing carries one of the highest rates of uncaptured revenue per procedure of any outpatient specialty. The primary cause is endoscopy bundling complexity: colonoscopy and upper endoscopy CPT codes — 45378-45398 and 43239-43270 — have payer-specific bundling rules that determine whether a diagnostic procedure converts to a therapeutic procedure code, whether a screening colonoscopy converts to diagnostic when polyps are found, and whether add-on procedures are separately billable or bundled into the primary endoscopy code.

A gastroenterology practice using a generalist billing company loses revenue on three predictable fronts: screening-to-diagnostic colonoscopy conversion errors that undercode high-complexity procedures, endoscopy add-on code bundling errors that leave separately billable procedures uncompensated, and anesthesia coordination billing gaps for monitored anesthesia care (MAC) during endoscopy that require separate MAC claim submission with accurate units.

GI Billing: The 4 Highest-Revenue-Risk Coding Scenarios

Top 10 Gastroenterology Billing Companies (2026) — Ranked

#1 — Medical Billers and Coders (MBC)

Best For: Gastroenterology physician groups, GI surgery practices, and multi-specialty groups with high endoscopy volume requiring specialty-specific coding and add-on procedure capture.

MBC’s gastroenterology billing team is built around the single most important GI billing decision: screening-to-diagnostic-to-therapeutic colonoscopy conversion.

Every colonoscopy claim is reviewed by AAPC-certified GI coders against the operative report to confirm correct CPT selection — distinguishing between 45378 (diagnostic colonoscopy), 45380 (colonoscopy with biopsy), 45385 (colonoscopy with lesion removal), and 45388 (colonoscopy with ablation) based on documented procedure findings, not claim-level auto-assignment.

Add-on code capture — the separately billable procedures that generalist billing companies routinely miss because CCI edits superficially suggest bundling — is applied at the claim level with payer-specific modifier 59 and XS logic that preserves separate reimbursement for procedures that payers allow when correctly documented.

MAC anesthesia claims for endoscopy procedures are submitted as separate claims with correct unit calculation, preventing the $200-$600 per case revenue gap that practices with generalist billing consistently experience.

Performance: 97.4% clean claim rate | 95% NCR | AAPC-certified GI coders | Add-on procedure capture | MAC billing included | All U.S. states | 888-357-3226

#2 — Athenahealth

Athenahealth’s network claims engine applies updated CCI edit logic for GI procedure bundles across major payers. For GI practices on the athenaOne platform with standard colonoscopy and upper endoscopy volumes, the platform reduces common bundling errors. The limitation: screening-to-therapeutic conversion requires human coder review of operative documentation that the athenaOne standard billing layer does not perform at the individual procedure level.

#3 — Transcure

Transcure’s AI-powered claim scrubbing applies CCI edit compliance at scale for GI procedure bundles, with documented first-pass accuracy above 96%. Complex screening-to-therapeutic conversion and MAC anesthesia claim coordination still require the specialist coder oversight that Transcure’s AAPC-certified team provides as a supplemental layer to the AI submission engine.

#4 — GeBBS Healthcare Solutions

GeBBS provides GI billing through offshore AAPC-certified coders with documented endoscopy coding training. CCI edit compliance and add-on code logic are applied at the coder level. Real-time payer policy updates for GI-specific LCD changes — particularly Medicare coverage determinations for surveillance colonoscopy intervals — require verification that the offshore team maintains current domestic MAC policy awareness.

#5 — Coronis Health

Coronis Health supports GI billing within health system RCM structures. Hospital-affiliated GI departments with integrated endoscopy suite billing benefit from Coronis’s enterprise infrastructure. Independent GI physician groups should verify that assigned billing staff hold GI-specific coding certification, particularly for the screening-to-therapeutic conversion and add-on procedure capture scenarios that generate the highest revenue variance.

#6 — R1 RCM

R1 RCM’s enterprise denial management handles high-volume GI endoscopy billing for hospital systems with dedicated endoscopy suites. Independent GI physician groups face institutional pricing and operational complexity that exceeds requirements for most outpatient GI practices.

#7 — AdvancedMD

AdvancedMD lacks in-house medical coding. GI practices on the AdvancedMD platform rely on documentation quality alone for coding decisions — creating systematic risk for screening-to-therapeutic conversion and add-on code capture that requires coder intervention to resolve.

#8 — CareCloud

CareCloud’s general outpatient billing infrastructure handles standard E/M claims for GI practices. Endoscopy procedure billing — the highest-revenue and highest-complexity component of GI RCM — requires specialty coding expertise that CareCloud does not consistently provide through its standard billing service layer.

#9 — Kareo / Tebra

Kareo/Tebra is appropriate for GI practices with low endoscopy volume and simple payer mixes. High-volume colonoscopy practices — where the revenue impact of systematic conversion errors compounds across 200-400 procedures monthly — require RCM depth beyond Kareo’s platform.

#10 — Greenway Health

Greenway Health’s ambulatory billing supports standard GI outpatient E/M billing. Endoscopy procedure billing with add-on code capture and MAC anesthesia coordination requires supplemental specialty coder support beyond Greenway’s standard RCM offering.

GI Billing Company Comparison (2026)

Questions to Ask a GI Billing Company Before Signing

• How do your coders determine whether a screening colonoscopy should be converted to a therapeutic code — and can you show me the workflow?
• Which CCI edits affect your GI add-on code capture, and how do you apply modifier 59 versus XS to preserve separate reimbursement?
• Do you submit MAC anesthesia claims as separate claims with correct unit calculation, or does your billing service exclude anesthesia coordination?
• What is your NCR for GI practices with endoscopy volumes above 150 procedures per month?
• How do you track Medicare surveillance colonoscopy interval coverage determinations by MAC jurisdiction?

Bottom Line

Gastroenterology billing accuracy is determined in the operative report review — not the claim submission interface. The difference between a generalist billing company and a GI-specialist RCM partner is whether a coder reads the colonoscopy report and selects the correct therapeutic code, or whether the claim defaults to the diagnostic code because no coder reviewed the procedure findings.

Medical Billers and Coders (MBC) delivers operative-report-level GI coding accuracy with AAPC-certified coders, a 97.4% clean claim rate, and systematic add-on code capture for GI physician groups in all U.S. states.

Phone: 888-357-3226

Email: info@medicalbillersandcoders.com

FAQs: Top 10 Gastroenterology Billing Companies (2026)

Debbie Young

A Subject Matter Expert in healthcare billing operations with nearly 10 years of experience, sharing insights on claims processing, coding support, and revenue cycle optimization. Dedicated to educating healthcare professionals on compliance, accuracy, and strategies to improve billing performance.