When I was on coumadin I was always tested once a month as long as I stayed in range. Never heard of going 3 months between testing. I've used coumadin off and on for the past four years.

However, I did a google search and found this so I guess 3 months isn't unusual.

Gradually, as you are taking Coumadin for a longer period of time, it is possible to take the drug without frequent blood tests. Once a steady dosage schedule is finally reached, most patients administer the same dose for long periods of time without blood testing. Some physicians will keep their patients on a schedule of every 3 months for repeat testing. However, more frequent testing is indicated if the patient develops a serious infection, new illness, is started or withdrawn from medications which affect Coumadin, etc. If you have any questions about how often your blood tests should be performed, or what INR target range is being used for treatment of your condition, then please address these questions to your treating physician.

One month is standard at the clinic where I work, but we do have a few exceptional patients who don't come in that often.
Note in the post by katywhite that if ANYTHING changes you should get it checked more often.
You must be an exceptionally good patient!

Thanks to both for your replies. I am always between 2.0 and 3.0 but the numbers do vary in that range. I was considering changing to Pradaxa, but if I can test @ 3 month intervals, I may just stay on Coumadin. (its a lot cheaper) Thanks again Katy for the Google info.

i beg to differ i would argue with them to go atleast monthly not 3 months .
this is just my personal point i am also close to the numbers but they at the most will tell me to check monthly only if the number was right and if it doesnt i would go back even bi weekly .

My Doc won't let me go more than 1 month. Stress, food and other
meds can disrupt the viscoscity of the blood and he likes to keep a check on it.