Thanks for the query to H.C.M. Forum.
Hydronepharosis with raised serum creatinine
level is an indication of disorder in kidney
Once again K U B image is very important.
Get in blood for urea, uric acid, serum cretinine, sugar, lipid profiles.
Urine analysis will assess infection in kidney.
Once again consult doctor
( treating) and get his opinion regarding this.
Hope I have answered your question.
If further any question I will help.
Get well soon.