P74.42Disturbances of chlorine balance of newborn

P74.42 is the ICD-10-CM diagnosis code for disturbances of chlorine balance of newborn. It belongs to category P74 (other transitory neonatal electrolyte and metabolic disturbances), block P70-P74 (transitory endocrine and metabolic disorders specific to newborn) and chapter 16 (certain conditions originating in the perinatal period). It is a header code, so it can't be reported by itself; one of its 2 subcodes must be used instead.

Within P74.4 (other transitory electrolyte disturbances of newborn), P74.42 is specifically for disturbances of chlorine balance of newborn. Related codes cover Alkalosis of newborn (P74.41) and other transitory electrolyte disturbance of newborn (P74.49).

To report this condition, pick the subcode that matches the documentation: P74.421 (newborn) and P74.422 (newborn).

It was added in FY2019, effective October 1, 2018.