P74.421 — Hyperchloremia of newborn
P74.421 is a billable, specific ICD-10-CM code for hyperchloremia of newborn. It is valid for submission on a claim.
Excludes2 — not included here, but may coexist
The excluded condition is not part of this code, but a patient can have both. You may code both.
- late metabolic acidosis of the newborn (P74.0)
Inclusion terms
Alternative wordings a physician may use in the chart for this same code.
- Hyperchloremic metabolic acidosis
Risk adjustment
P74.421 does not map to an HCC and does not risk-adjust under CMS-HCC V28. That is normal — most ICD-10 codes do not. It still needs to be coded correctly; it just will not move a RAF score.
How P74.421 is indexed
Coders do not find codes by browsing the tabular list — they look them up in the alphabetic index, under the word the physician wrote. These are the index entries that lead here, so you can see which chart wordings map to P74.421.
- Acidosis›metabolic NEC›hyperchloremic, of newborn
- Disturbance›electrolyte›newborn, transitory›hyperchloremia
- Disturbance›electrolyte›newborn, transitory›hyperchloremic metabolic acidosis
Related codes at this level
Codes that share P74.42. If P74.421 is not quite right, the correct code is usually one of these.
Questions about P74.421
- Is P74.421 a billable ICD-10-CM code?
- Yes. P74.421 is a billable, specific ICD-10-CM code and is valid for submission on a claim.
- Where does P74.421 sit in the tabular list?
- Certain conditions originating in the perinatal period (P00-P96), in the block Transitory endocrine and metabolic disorders specific to newborn (P70-P74).