+1 888 701 6090

Gastroenterology Billing Services

Colonoscopy coding alone has multiple variations based on screening vs diagnostic, findings, and interventions performed. Add EGD, capsule endoscopy, and motility studies, and GI billing becomes one of the most complex specialties.

AAPC Certified
HIPAA Compliant
All 50 States
Starting at 2.49%
Get Your Free QuoteCall 888-701-6090
HIPAA Compliant
AAPC Certified
4.9/5 Rating
300+ Practices
45378Colonoscopy
45385Polypectomy
43239EGD Biopsy
91110Capsule

Why Gastroenterology Billing Requires Specialty Expertise

GI billing centers on endoscopy coding. When a screening colonoscopy (45378) finds a polyp, it becomes a diagnostic procedure with different coding and cost-sharing rules. Getting this conversion right affects both provider reimbursement and patient billing.

Common Gastroenterology CPT Codes

Our coders handle these gastroenterology codes daily. This is not an exhaustive list.

Code
Description
45378
Colonoscopy
45385
Polypectomy
43239
EGD Biopsy
91110
Capsule

Gastroenterology Billing Challenges We Solve

Common billing problems in gastroenterology and how our team handles them.

Screening to Diagnostic Conversion

When a screening colonoscopy finds pathology, the coding changes. This affects cost-sharing and requires correct diagnosis code sequencing.

Multiple Procedure Endoscopy

When both colonoscopy and EGD are done same session, specific modifier and code rules apply.

Facility vs Professional

ASC vs office-based endoscopy has different coding and reimbursement rules.

Polyp Removal Technique

Snare (45385), hot biopsy (45384), and cold biopsy have different codes and RVUs.

Common Gastroenterology Denial Reasons

We prevent these before submission and appeal aggressively when they occur.

!
When a screening colonoscopy finds pathology, the coding changes
!
When both colonoscopy and EGD are done same session, specific modifier and code rules apply
!
ASC vs office-based endoscopy has different coding and reimbursement rules
!
Snare (45385), hot biopsy (45384), and cold biopsy have different codes and RVUs

Revenue Opportunities Most Gastroenterology Practices Miss

GI practices lose the most revenue on screening-to-diagnostic conversion coding. When a screening colonoscopy finds a polyp, the procedure is no longer a screening — it's diagnostic. But many practices continue to submit with the screening diagnosis (Z12.11), which means the patient's cost-sharing remains at $0 under the ACA, and the practice misses the higher diagnostic reimbursement from payers. Correct conversion coding can add $100 to $200 per procedure. Same-session multi-procedure coding is the second opportunity. When both EGD and colonoscopy are performed in the same session, both are billable. But the sequencing matters — the higher-RVU procedure should be listed first to minimize the multiple procedure reduction impact.

Payer-Specific Gastroenterology Billing Tips

Medicare covers screening colonoscopy at 100% for patients 45+ (lowered from 50 in recent years). However, when a screening converts to diagnostic, Medicare still covers the colonoscopy at 100% but the polyp removal is subject to the deductible. Commercial payers under the ACA must cover screening at 100%, but their policies on screening-to-diagnostic conversion vary. Some apply the deductible to the polyp removal, others cover the entire procedure at 100%. Prior authorization for GI procedures is relatively uncommon for colonoscopy (most payers consider it preventive) but is increasingly required for capsule endoscopy, motility studies, and advanced endoscopic procedures like EUS and ERCP.

Gastroenterology Billing Best Practices

Practical tips from our coding team to maximize reimbursement and minimize denials.

1
When a screening colonoscopy converts to diagnostic (polyp found), change the primary diagnosis from Z12.11 to the pathology-appropriate code. This affects patient cost-sharing under the ACA.
2
For same-session EGD and colonoscopy, use modifier 59 on the lower-reimbursing procedure. The multiple procedure reduction still applies, so sequence the higher-RVU procedure first.
3
Document the polyp removal technique precisely — snare (45385), hot biopsy (45384), and cold forceps (45380) have different codes and different reimbursement levels.
4
Capsule endoscopy (91110) requires documented failure of standard endoscopy or specific indications (obscure GI bleeding) for medical necessity.

Get Expert Gastroenterology Billing Support

Free billing assessment for your gastroenterology practice. See where revenue is leaking.

98%+ clean claim rate
2.49% starting rate
Results in 30 days

Fill in your details and we'll call you back

Or call directly:888-701-6090

What We Handle for Gastroenterology Practices

Colonoscopy coding (screening and diagnostic)
EGD and upper endoscopy billing
Capsule endoscopy coding
Motility study billing
Same-day multi-procedure coding
ASC vs office-based endoscopy billing

Why Choose Go Medical Billing for Gastroenterology

Our GI coders understand screening-to-diagnostic conversion, polyp removal technique coding, and the multi-procedure rules that apply when both upper and lower endoscopy are performed.

We serve gastroenterology practices in all 50 states, starting at 2.49% of collections. Our credentialing team handles payer enrollment, and our A/R specialists recover aging claims.

Gastroenterology Billing by State

We handle gastroenterology billing in all 50 states. Select your state for location-specific payer details, Medicaid rules, and Medicare MAC policies.

CaliforniaTexasFloridaNew YorkPennsylvaniaIllinoisOhioGeorgiaNorth CarolinaMichiganNew JerseyVirginiaMassachusettsArizonaTennesseeMarylandIndianaMissouriWisconsinColorado
View all 50 states

Related Resources

Medical Billing & Coding ServicesA/R Recovery ServicesCredentialing & ContractingCase Studies & ResultsPricing

Frequently Asked Questions

We code the conversion correctly with proper diagnosis sequencing, ensuring your reimbursement isn't affected and patients aren't incorrectly billed.
Yes. Facility and professional fee billing for ambulatory surgical centers.

Get Expert Gastroenterology Billing Support

Stop losing revenue to gastroenterology coding errors and preventable denials. Call 888-701-6090 for a free billing assessment.

Schedule a Free ConsultationCall 888-701-6090