An incomplete colonoscopy, e.g., the inability to advance the colonoscope to the cecum or colon-small intestine anastomosis due to unforeseen circumstances, is billed and paid using colonoscopy through stoma code 44388, colonoscopy code 45378, and screening colonoscopy codes G0105 and G0121 with modifier “-53.” (Code 44388 is valid with modifier 53 beginning January 1, 2016.) The Medicare physician fee schedule database has specific values for codes 44388-53, 45378-53, G0105-53 and G0121-53. An incomplete colonoscopy performed prior to January 1, 2016, is paid at the same rate as a sigmoidoscopy. Beginning January 1, 2016,
Medicare will pay for the interrupted colonoscopy at a rate that is calculated using one-half the value of the inputs for the codes.
Reference: https://www.cms.gov/Outreach-and-Education/Medicare-Learning-Network-MLN/MLNMattersArticles/downloads/MM9317.pdf