N18.3Chronic kidney disease, stage 3 (moderate)

N18.3 is the ICD-10-CM diagnosis code for chronic kidney disease, stage 3 (moderate). It belongs to category N18 (chronic kidney disease (CKD)), block N17-N19 (acute kidney failure and chronic kidney disease) and chapter 14 (diseases of the genitourinary system). It is a header code, so it can't be reported by itself; one of its 3 subcodes must be used instead.

Within N18 (chronic kidney disease (CKD)), N18.3 is specifically for chronic kidney disease, stage 3 (moderate). Related codes cover chronic kidney disease, stage 1 (N18.1), chronic kidney disease, stage 2 (mild) (N18.2), chronic kidney disease, stage 4 (severe) (N18.4), chronic kidney disease, stage 5 (N18.5), end stage renal disease (N18.6) and chronic kidney disease, unspecified (N18.9).

To report this condition, pick the subcode that matches the documentation: N18.30 (unspecified), N18.31 (3a) and N18.32 (3b).

Code first any associated: diabetic chronic kidney disease (E08.22, E09.22, E10.22, E11.22, E13.22) and hypertensive chronic kidney disease (I12.-, I13.-).

Use an additional code, if applicable, to identify: associated cachexia (E88.A) and kidney transplant status (Z94.0).

It has been part of ICD-10-CM since the code set took effect on October 1, 2015, and changed in FY2021 (expanded into subcodes).

Before ICD-10, this condition was coded in ICD-9-CM as 585.3 (chronic kidney disease, Stage III (moderate)).