Can a child's blood sugar sore to over 200 due to trauma from a fall or could something else be going on?

Yes: It is possible but not probable. The body's stress response to trauma could cause a temporary increase in blood sugar levels. That being said you will need to recheck the fasting blood sugar to see if it remains high and get a hemoglobin a1c level. If these are abnormal then i would agree the diagnosis is diabetes.

Not likely: No, trauma would not cause blood sugar to rise unless a) the child was already a diabetic in the first place or b) the pancreas was injured in the fall and is not secreting Insulin as it should be (however, if the pancreas was injured, the child would be experiencing extreme abdominal pain). High blood sugar in a fasting state is a sign of possible diabetes.

Elevated Blood Sugar: Certainly blood sugar can elevated due to trauma but it would be very unusual for a child's sugar to go up to 200. Does your child have diabetes. If not , i would take him/ her to the doctor to get checked for diabetes.

Suspicious : There is an entity called stress hyperglycemia, but blood sugars this high imply that there may be an underlying concern for diabetes. Once all better such patients are often referred to a pediatric endocrinologist for further work-up. However, high dose steroids could cause high blood sugars like this and once weaned kids usually ok also. Peds endo will be helpful. Sooner consult if still high.

Part 2 : If blood sugar is persistently elevated while in the hospital, a pediatric endocrinology consult should be considered while the child is still an in-patient.