Do we need to consult a urologist about hydronephrosis and, if so, when?

Once the diagnosis of hydronephrosis is made, the urologist should be consulted to review the X rays, perform a complete history and physical examination of the baby and then determine if any other further studies are necessary. While this is generally not an urgent condition, if the child is having pain, significant infections, or it involves both kidneys, then the urologist should see the child immediately.