The physician performed a screening colonoscopy on a patient who is covered under Medicaid. I selected 45378 with dx code of v76.51; however, when abstracting in the computer, an error message came up saying that this is not acceptable. I then researched and found something from 2002 which said that you could use G-codes for Medicaid screening colonoscopies. I am totally confused at this point and would appreciate any help!