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

Procedure · Updated Aug 1, 2026

Colonoscopy: CPT code and Medicare rate

An examination of the colon with a flexible scope. 45378 is the diagnostic version, used to investigate symptoms such as bleeding, anemia, or a change in bowel habits.

Also called: scope of the colon, bowel scope, lower endoscopy.

Usually billed as

45378 Diagnostic Colonoscopy
Office (non-facility)
$378.10
Facility
$164.67

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 done purely for screening uses a different code—see screening colonoscopy.

Common questions Copy link

Colonoscopy: which code is it?
45378—Diagnostic Colonoscopy. An examination of the colon with a flexible scope. 45378 is the diagnostic version, used to investigate symptoms such as bleeding, anemia, or a change in bowel habits.
Colonoscopy: how much does Medicare pay?
Nationally, the Q4 2026 Physician Fee Schedule pays $378.10 in an office (non-facility) setting and $164.67 in a facility setting for 45378. 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.
Colonoscopy: what else affects the billing?
A colonoscopy done purely for screening uses a different code—see screening colonoscopy.

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.

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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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