Dr. Grumpy: "Hi, this is Ibee Grumpy, I'm a neurologist, trying to get a brain MRI authorized on one of my patients."
Dr. Heller: "Okay, can you tell me about her?"
Dr. Grumpy: "She had a brain MRI on May 21, 2012, which showed a possible mass, so this is a 6 month follow-up study to see if it's changed."
Dr. Heller: "Okay... That sounds reasonable, but it hasn't been 6 months yet."
Dr. Grumpy: "What?"
Dr. Heller: "Well, her previous study was done on May 21th. Today is November 20th. So it isn't 6 months yet."
Dr. Grumpy: "Well, the study won't be done until next week, anyway, when it will have been 6 months."
Dr. Heller: "But the point is that you're calling on the 20th. It won't be 6 months until tomorrow."
Dr. Grumpy: "So you can't authorize this?"
Dr. Heller: "Nope. You'll have to call back tomorrow. Have a good day."