R. is 52, no family history of cancer, scheduled a first-time screening colonoscopy. ACA preventive-care coverage means a screening colonoscopy at her age is supposed to be a $0 procedure — no deductible, no copay, no coinsurance. She confirmed in writing with the GI office's scheduler. She confirmed again with her insurer's pre-call.
The bill arrived three weeks later: $1,200 in patient responsibility. The procedure had been coded as "diagnostic colonoscopy" (CPT 45378) instead of "screening colonoscopy" (G0121, the Medicare screening code adopted by most commercial carriers post-ACA). The reason: during the procedure the doctor found and removed a single small polyp, and the billing department flipped the entire visit to diagnostic.
This is one of the most common ACA-coverage failures in the country. The 2022 federal guidance explicitly says that a screening colonoscopy that becomes therapeutic — i.e. one or more polyps removed — STILL counts as preventive for billing purposes. The cost-share owed is $0.
Audra's audit cited the Departments of Labor + HHS + Treasury FAQ Part 56, Q1 — the explicit federal guidance on this exact situation. The appeal went out to the insurer (not the provider, because the provider had billed accurately given their internal policy; the insurer needed to reprocess as preventive). The insurer reprocessed within 14 days. Patient responsibility went to $0.