A bad measure of health, absolutely, because it's literally a third of a vague measure meant to give you slight idea of your health
https://www.nhlbi.nih.gov/health/edu...se_wt/risk.htm
Bags, for example, while classified as overweight by bmi alone, is much healthier at 15% body fat.
I have no dog in this fight, but it's worth noting that if we only know your height and weight, we should have some concern for your health. Gonna need deets asap. Can you get your GP to fax us medical records?