Screening colonscopy - CPT G0104, G0105,G0106 AND G0121

A Medicare beneficiary undergoing a screening colonoscopy (no symptoms and no abnormal findings prior to the procedure) will be responsible for the deductible if a polyp is identified and either biopsied or removed.

When there is no need for a therapeutic procedure, the appropriate HCPCS G-code is reported with the ICD-9-CM code reflecting the indication. Effective January 1, 2007, CMS began waiving the annual Medicare Part B deductible for colorectal cancer screening tests billed with the HCPCS G-codes listed in the following table:

HCPCS Screening Code	Description
G0104	Colorectal cancer screening: Flexible sigmoidoscopy
G0105	Colorectal cancer screening: Colonoscopy on individual at high risk;
G0121	Colorectal cancer screening: Colonoscopy on individual not meeting criteria for high risk
G0106	Colorectal cancer screening: Barium enema as an alternative to G0104, screening sigmoidoscopy
G0120	Colorectal cancer screening: Barium enema as an alternative to G0105, screening colonoscopy