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Describe a service in plain words, or type a CPT/HCPCS code.

Procedure · Updated Oct 1, 2026

Screening colonoscopy: CPT code and Medicare rate

A colonoscopy done for screening rather than to investigate symptoms. G0121 covers a patient at average risk; G0105 is used when personal or family history puts the patient at high risk.

Also called: colon cancer screening, routine colonoscopy, preventive colonoscopy.

Usually billed as

G0121
Office (non-facility)
$378.43
Facility
$165.00

National amounts for the Q4 2026 release (October 1 – December 31, 2026), using geographic index values of 1.000. Your local rate differs; the code page has the locality breakdown.

A colonoscopy in which a polyp is removed is a different service, such as 45385, with its own allowed amount.

Common questions Copy link

Screening colonoscopy: which code is it?
G0121. A colonoscopy done for screening rather than to investigate symptoms. G0121 covers a patient at average risk; G0105 is used when personal or family history puts the patient at high risk.
Screening colonoscopy: how much does Medicare pay?
Nationally, the Q4 2026 Physician Fee Schedule pays $378.43 in an office (non-facility) setting and $165.00 in a facility setting for G0121. Your local amount differs—the national figure applies geographic index values of 1.000, and Medicare then pays 80% of the allowed amount after the deductible is met.
Screening colonoscopy: what else affects the billing?
A colonoscopy in which a polyp is removed is a different service, such as 45385, with its own allowed amount.

Need the rate where you practice?

Every code page carries the full locality breakdown, the RVU and GPCI inputs, and the release the numbers come from.

Open the code page

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All procedures How Medicare pays Office vs. facility rates Check a medical bill

This page maps everyday language to the code a claim normally carries. It's general information about how Medicare prices a service, not coding advice for a specific claim. The correct code always depends on what was actually documented and performed.

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