P74.421 Hyperchloremia of newborn

Billable ICD-10-CM code, FY2026.

Applicable to

• Hyperchloremic metabolic acidosis

Excludes2 (not included here)

• late metabolic acidosis of the newborn (P74.0)

MS-DRG index

Defines the logic of DRG(s) 791 in MDC 15.

Code annotations containing back-references to P74.421

Back-references to P74

• Type 2 Excludes: P00 Newborn affected by maternal conditions that may be unrelated to present pregnancy ("newborn affected by maternal endocrine and metabolic disorders (P70-P74)")

Diagnosis Index entries for P74.421

• Acidosis (lactic) › metabolic NEC › hyperchloremic, of newborn
• Disturbance (s) › electrolyte › newborn, transitory › hyperchloremia
• Disturbance (s) › electrolyte › newborn, transitory › hyperchloremic metabolic acidosis

Nearby codes

• P74.31 Hyperkalemia of newborn
• P74.32 Hypokalemia of newborn
• P74.4 Other transitory electrolyte disturbances of newborn
• P74.41 Alkalosis of newborn
• P74.42 Disturbances of chlorine balance of newborn
• P74.421 Hyperchloremia of newborn (this code)
• P74.422 Hypochloremia of newborn
• P74.49 Other transitory electrolyte disturbance of newborn
• P74.5 Transitory tyrosinemia of newborn
• P74.6 Transitory hyperammonemia of newborn
• P74.8 Other transitory metabolic disturbances of newborn