You’ve seen your doctor, you’ve suffered through the tests, you may have been referred to a specialist. Now it’s time for the verdict – your diagnosis.

"You have XYZ," the doctor tells you. "And this is how we usually treat it."

That’s the perfect world – a concise answer, and well-defined next steps. But sometimes a diagnosis isn’t so clear. It’s even possible that it isn’t correct. So before you get into discussing treatment options with your doctor, there are five words that might make a huge difference in how well you weather your health storm.

You need to ask your doctor, "What else might it be?"

Asking what the other possibilities are does not assume your doctor’s diagnosis is wrong. It’s actually a request to participate in a decision-making process your doctor uses every day called "differential diagnosis."

Differential diagnosis is the detective side of determining your diagnosis. It uses evidence and the process of elimination to hone in on the closest answer. Your doctor compares the results of your symptoms, your tests, your family history, her own experience and observation, to a list of possible diagnoses which are all related in some way, but have differences among them. That review should help her eliminate all but one or two answers, resulting in the diagnosis she gives you.

Obtaining a list of the other possibilities from your doctor will give you clues as to why that particular diagnosis was determined for you. It’s also a confirmation step. It’s always possible that symptoms were recorded incorrectly, or that test results got filed incorrectly. As you review the evidence, you can verify that it is yours, and is accurate. If you find errors this early in the process, it allows you to correct the course early, before you waste time with wrong, or unnecessary treatment.

Even after you’ve begun treatment, you may decide it’s not helping you. Your doctor’s original diagnosis may have been flawed. At that point you can study more about the other diagnoses on the list to determine whether one of them is a closer answer. Armed with this extra understanding, you’ll be able to discuss the alternatives intelligently when you return to your doctor, or when you seek a second opinion.

Sharp patients know that asking "what else might it be?" can make a huge difference in treatment success, and eventual health outcomes.