Gastroenterology billing
In gastroenterology, one decision drives most of the billing outcome: was this colonoscopy screening or diagnostic? Get the modifier and diagnosis sequencing wrong and the patient receives a surprise bill for a procedure that should have carried no cost share.
What actually gets denied
When a polyp is removed during a screening colonoscopy, the service converts. Commercial claims need modifier 33 and Medicare needs PT, with the screening diagnosis sequenced first, or the preventive benefit is lost and the patient is billed.
Multiple endoscopy rules reduce payment against the base code of the family; incorrect sequencing quietly reduces the allowable.
Snare, hot biopsy, cold forceps and EMR are distinct codes and cannot be chosen from a template.
High-risk versus average-risk patients have different covered intervals; a procedure done early denies as too frequent.
Payer behavior
Monitored anesthesia care for endoscopy is separately billed by the anesthesia provider and has its own medical necessity policy — the two claims must agree.
ASC, hospital outpatient and office settings pay differently and use different claim forms.
Specimens sent out generate a separate claim that must carry a matching diagnosis to pay.
Documentation traps
The intent of the procedure must be documented before findings are described.
Whether the cecum was reached affects code selection and quality reporting.
Technique-specific codes are reported per technique, not per polyp.
Every gastroenterology account is staffed by coders who bill this specialty daily. The work spans our full medical billing and revenue cycle management services — coding, claim scrubbing, denial management and A/R recovery — and you can see how engagements are structured on our pricing page. For the full specialty bench, go back to all specialties we bill, or contact us at (555) 555-0142.
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