Gastroenterology Billing Services
AnnexMed’s gastroenterology RCM services span diagnostic endoscopies to therapeutic procedures, streamlining billing, maximizing collections, and ensuring compliance through certified GI coders and AR experts.
- 20+ years of medical billing and RCM expertise.
- Certified GI coders trained in gastroenterology billing guidelines.
- Experience across 40+ practice management and EHR systems.
- Proven success with high-volume endoscopy centers and GI groups.
Schedule a Consultation
We deliver consistent results for our partners
78%
Appeal Success Rate
98%
Clean Claim Rate
5000+
GI Claims processed monthly
22
States, GI Groups Served
Gastroenterology RCM Expertise That Goes Deep, Like Your Scopes​​
Whether you’re billing for a routine colonoscopy or a complex ERCP, gastroenterology billing demands precision. AnnexMed specializes in translating detailed procedure notes, applying accurate modifiers, and aligning with evolving payer rules to generate clean claims.Â
With our GI-specific billing services, your team can stay focused on care while we safeguard your revenue and compliance.
RCM Services for Gastroenterology Practices
From front-end checks to denial prevention, we align every step to reduce errors, speed up payments, and protect compliance.
Eligibility and Benefits Verification
We verify eligibility, benefits, and COB up front to avoid downstream rejections. This clears bottlenecks and speeds up gastroenterology reimbursements.
Prior Authorization Services
We manage authorizations for scopes, sedation, and advanced diagnostics. Timely approvals help prevent GI claim denials and treatment delays.
AR Management and Follow-Up
Our gastroenterology AR management workflows push claims from submission to resolution with strategic follow-up.
Denial and Appeal Management
We map patterns, resolve root issues, and build payer-specific edits to stop repeat denials in their tracks.
Accurate GI CPT and ICD Coding
Every procedure from colonoscopy to ERCP is coded with accurate sequencing, bundling, and modifiers (-59, -26, -51).
HIPAA-Compliant GI Billing
We ensure HIPAA-compliant GI billing with pre-submission checks, aligned documentation, and payer-specific reviews for clean, audit-ready claims.
Why AnnexMed?
Comprehensive Revenue Cycle Solutions That Scale With You
AnnexMed brings precision to every aspect of gastroenterology billing, coding, documentation, and payer-specific workflows. We help GI practices reduce denials, speed up reimbursements, and stay fully compliant without slowing operations.
- Coders Trained in GI-Specific CPT and Modifier Logic
- Accurate Documentation Mapping Before Submission
- Integrated With 40+ EHRs and PM Systems
- Dedicated Teams for Prior Auths and COB Checks
- Scalable Support From Solo GI Clinics to Multi-Provider Groups
- Pre-Submission Audits That Catch Denials Before They Happen

Common Billing Challenges that Impacts Revenue
You don’t need another generic billing checklist. You need someone who knows how GI claims actually fall apart and how to prevent it before it hits your AR.
-
Modifier Application Errors
Improper modifier use (-59, -25, -26) when billing bundled or overlapping gastroenterology procedures -
Eligibility Verification Delays
Manual eligibility checks that stall GI patient intake and slow gastroenterology claims from the start
-
Missed Prior Authorizations
Missed pre-authorizations for sedation, high-cost diagnostics, or advanced endoscopic interventions -
Overlooked GI Charges
Unbilled charges for capsule endoscopy, GI panels, or motility studies due to code or note gaps
-
Add-On Billing Denials
Denied claims from incorrect billing of anesthesia, pathology, or post-scope procedural add-ons -
Unclear Procedure Documentation
Incomplete documentation that fails to separate diagnostic and therapeutic intent in GI procedures
Start With a Call. We’ll Meet You Where Your Billing Needs Are.
Whether you need full-cycle Gastroenterology RCM or help cleaning up aged AR, we’ll align with your practice’s goals from day one.
GI Billing Compliance You Can Trust
Compliance Built Into Every Step of Your GI Revenue Cycle
In gastroenterology billing, compliance is foundational to how every process runs, from documentation to payer submissions. At AnnexMed, every GI claim moves through workflows aligned with HIPAA, FDCPA, and payer-specific billing rules to protect PHI, reduce audit risk, and meet evolving regulatory standards.
Our in-house compliance team oversees live audits, system monitoring, and quarterly HIPAA training to keep your billing audit-ready. With SOC 2, ISO 27001, and credentialing oversight in place, we ensure your revenue stays secure, your data protected, and your team confident under review.

SOC 2 Type 1

ISO 27001:2022

ISO 9001:2015

SOC 2 Type 2
Case Studies
From Errors to Excellence! Florida Ortho Practice Hits 95% Coding Accuracy
FAQs in Gastroenterology Billing & Coding
Ready to Get Started?
Whether you need full-scale support or help with just one part of the revenue cycle, AnnexMed offers modular services tailored to your most pressing needs.
Let's get started with,
- A quick discovery call to understand your goals
- Insights on how our services align with your workflows
- Guidance on compliance, turnaround, and scaling
- Option to request case study examples
Why AnnexMed?
- 20+ Years of RCM Excellence
- HIPPA Complaince Workflows
- 50+ Specialties Supported​
- U.S. Based & Offshore Hybrid Teams​