What does it mean if my 3 week old son has elevated bilirubin in his liver?

Follow up needed: As neonatal jaundice is common upto 7 days , in most cases and in few upto10 days, continued high levels raise some concern about ruling out some congenital problems of liver and the bile ducts and also some diseases called inborn errors of metabolism related carbohydrates, proteins and fats. Hence need to see his pediatrician who may refer him to ped. Hepatologists. Serial estimat. Of bili needed.