P74.421
Billable codeHyperchloremia of newborn
The ICD-10 code for hyperchloremia of newborn is P74.421.
Clinical notes
Excludes2 (not included here)
An Excludes2 note means the excluded condition is not part of this one, but a patient can have both at the same time — in that case both codes may be reported together.
- late metabolic acidosis of the newborn (P74.0)
Also known as
Alternate wording, synonyms, or specific conditions that fall under this code, listed to help confirm you've picked the right one.
- Hyperchloremic metabolic acidosis
Documentation support
General coding-documentation guidance — not a substitute for payer-specific requirements or professional coding judgment.
- •As a general rule, code to the highest level of specificity supported by the documentation in the medical record.
Related codes in this category
- P74.422Hypochloremia of newborn
- P74.421Hyperchloremia of newborn
Associated MS-DRGs
P74.421 can serve as the principal diagnosis for these Medicare Severity Diagnosis-Related Groups.
Informational only — actual DRG assignment also depends on procedures, complications/comorbidities (CC/MCC), discharge status, and payer-specific rules not reflected here.