G0121
GICMS status: AColorectal cancer screening; colonoscopy on individual not meeting criteria for high risk.
Work RVU
3.36
Practice RVU
4.92
Malpractice RVU
0.34
Total RVU
8.62
2026 Medicare payment
$287.92
National GPCI = 1.000 · Conversion factor $33.4009 · Non-facility
Model this code
Drop G0121 into a scenario to see how unit volume rolls up to annual wRVUs, gross collections, and bonus.
Open in calculator →When to use it
Average-risk Medicare screening colonoscopy. Once per 10 years.
Documentation checklist
- ✓Screening indication documented.
- ✓No personal or family history of polyps/CRC qualifying as high risk.
Common pitfalls
- !If a polyp is found and removed, the screening becomes diagnostic — use 45385 with modifier PT.
- !Patient cost share is waived for screening but may apply for the diagnostic conversion.
Common modifiers
PT (Medicare screening converted to diagnostic)33 (commercial)
Common ICD-10 pairings
Z12.11
Educational reference, not billing or legal advice. Verify against your payer contracts and your compliance team before submission.