P74.1Dehydration of newborn

P74.1 is the ICD-10-CM diagnosis code for Dehydration 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 billable, so it can be reported on its own for dates of service from October 1, 2026 through September 30, 2027.

Within P74 (other transitory neonatal electrolyte and metabolic disturbances), P74.1 is specifically for Dehydration of newborn. Related codes cover late metabolic acidosis of newborn (P74.0), disturbances of sodium balance of newborn (P74.2), disturbances of potassium balance of newborn (P74.3), other transitory electrolyte disturbances of newborn (P74.4), transitory tyrosinemia of newborn (P74.5), transitory hyperammonemia of newborn (P74.6), other transitory metabolic disturbances of newborn (P74.8) and transitory metabolic disturbance of newborn, unspecified (P74.9).

It is not a CC or MCC, so as a secondary diagnosis it doesn't change the MS-DRG severity level.

In MS-DRG v44.0, it is part of the grouping logic for DRG 791 (Prematurity with Major Problems, relative weight 4.1075) and DRG 793 (Full Term Neonate with Major Problems, relative weight 4.2195), in MDC 15 (Newborns and Other Neonates with Conditions Originating in the Perinatal Period), as a principal or secondary diagnosis. The DRG a claim lands in depends on the principal diagnosis, procedures and any CC/MCC secondary diagnoses.

It has been part of ICD-10-CM since the code set took effect on October 1, 2015 and hasn't changed since.

Before ICD-10, this condition was coded in ICD-9-CM as 775.5 (other transitory neonatal electrolyte disturbances).