Specialty
Gastroenterology Medical Billing
Screening versus diagnostic — one word that decides whether the patient owes anything.
What makes gastroenterology billing different
Gastroenterology has a coverage distinction sharper than almost any other specialty. A screening colonoscopy is covered at no cost to the patient under preventive benefits. A diagnostic colonoscopy is not. The procedure can be identical.
Worse, the classification can change mid-procedure. A screening colonoscopy that finds and removes a polyp becomes therapeutic, and how that is coded determines whether a patient who was told the procedure was free receives a bill. Getting it wrong is both a revenue problem and a complaint.
Screening that becomes therapeutic
Modifier PT for Medicare, modifier 33 for commercial. Omit it and the patient is billed for a screening they were told was covered.
Removal technique drives the code
Snare, cold biopsy and ablation are separate codes. The note has to state the technique, not merely that a polyp was removed.
Anaesthesia billed without medical necessity
Monitored anaesthesia care is not automatically covered for routine endoscopy. Some payers require documented risk factors.
Screening interval not checked
Payers enforce frequency limits. A colonoscopy inside the interval denies regardless of clinical judgement.
Ask any billing company this
“How do you code a screening colonoscopy that finds a polyp?”
A company that bills your specialty properly will answer this in one sentence. A company that treats every specialty the same will answer it with a brochure.A note on accuracy. Coding rules, coverage policies and payer edits change continually, and the specifics above reflect general practice rather than any individual payer contract or local coverage determination. Treat this page as a map of where to look, not as coding advice for a particular claim.