Specialty
Gastroenterology Billing and RCM
Screening or diagnostic. The same colonoscopy pays differently depending on why it happened.
Why it’s different
A colonoscopy that begins as a screening and finds a polyp is no longer a screening, and the patient's cost-sharing changes with it. Getting that transition wrong produces either a patient balance that should never have been billed, or a denial that should never have happened.
Anesthesia billed alongside, and payer-specific bundling rules on multiple procedures in one session, add more places for it to break.
Common challenges
Where the money goes missing.
- Screening to Diagnostic
- Mid-procedure conversion requiring modifier PT or 33, and frequently missed.
- Medicare vs Commercial
- Different screening code sets — G0105 and G0121 against the 45378 series.
- Patient Cost-Sharing
- Waived for screening, then incorrectly applied after conversion.
- Anesthesia Alignment
- Anesthesia claims denied when they don't match the endoscopy claim.
- Bundling Edits
- Multiple procedures in one session hitting NCCI edits without the right modifier.
How we help
We check every endoscopy claim for screening-to-diagnostic conversion, confirm the correct code set for the payer, and reconcile the anesthesia claim against the procedure claim before either goes out.
We do not provide coders. Your clinical team assigns the codes. We verify and validate them.
Key codes
- CPT 45378–45385
- HCPCS G0105 / G0121
- Modifier PT
- Modifier 33
- Modifier 59
Indicative, not exhaustive. Code sets and payer policies change.
Get a Gastroenterology Billing Analysis
Send us a sample of your denials. We'll tell you what's actually driving them in your specialty.