For an insurance discount blood test how long will it take to get cigarette smoking to not show on test? i smoke @3 cigarettes/day.

1 week: You need to stop smoking as this is never a good choice. But for practical purposes you need to remain 1 week at minimum without smoking.

Can't say: “When someone stops using tobacco and nicotine products, it can take more than two weeks for the blood level of cotinine to drop to the level that a non-tobacco user would have and several weeks more for the urine level to decrease to a very low concentration.” REF: http://labtestsonline.org/understanding/analytes/nicotine/tab/test/