Need help with biliary sludge icd-9

Doctor did ballon sweep with 12 mm ballon extracted biliary sludge. What is the diagnosis code?

Thanks

biliary sludge

I have always used 575.8.

576.8

from coding clinic 2Q 2003 volume 20 number 3 page 17-18

i would follow coding clinic and use 576.8 Other disoders of biliary tract