STABLE patients are monitored every 4 to 6 weeks at Coumadin Clinics. When a dose change is made, they usually like to re-check in 2 weeks.
I have a home test unit but do NOT home test because my insurance won't cover the test strips but will cover my lab tests (by finger stick fortunately!).
If I were doing home testing, I'd probably do it every 2 weeks unless there was an out of range reading. I would also allow a little extra variation to my range due to possible test error. My recommended range is 3.0 to 3.5 which is too narrow IMHO. As long as my INR is between 2.5 and 4.0 I'm content.
'AL Capshaw'