Using the ICD-10 book, assign the proper diagnosis code to the following: Case Study 8
Discharge Summary
This 73-year-old male patient is being discharged today following a -day length of stay for his stage 4 renal disease. During this admission he received dialysis and we discussed that the disease is progressing. His medications were adjusted and he will continue dialysis as an outpatient.

A) N18.4
B) N19.1
C) N20.0
D) N21.2