P74.421 — Hyperchloremia of newborn
Is P74.421 billable?
Yes — P74.421 is billable for FY2027. P74.421 is a valid, billable ICD-10-CM code at the highest level of specificity in its branch. P74.421 may be submitted for encounters from October 1, 2026 through September 30, 2027.
P74.421 at a glance
| Code | P74.421 |
|---|---|
| Description | Hyperchloremia of newborn |
| Billable | Yes |
| Code set | ICD-10-CM FY2027 |
| Valid for encounters | October 1, 2026 – September 30, 2027 |
Which MS-DRGs does P74.421 group to?
P74.421 sits in MDC 15 and helps define the logic of 1 MS-DRG (version 44, FY2027). Which one a stay actually groups to also depends on procedures and secondary diagnoses.
- 791Prematurity with Major Problemsmedical
How is P74.421 listed in the Alphabetic Index?
These are the routes through the Alphabetic Index that lead to P74.421. They show the wording a clinician may have documented, which often differs from the Tabular description.
- Acidosis › metabolic NEC › hyperchloremic, of newborn (lactic)
- Disturbance › electrolyte › newborn, transitory › hyperchloremia (s)
- Disturbance › electrolyte › newborn, transitory › hyperchloremic metabolic acidosis (s)
Excludes2 — not included here
The conditions below are not part of P74.421, but a patient may have both at the same time. When documentation supports it, P74.421 and the excluded code may both be reported.
- late metabolic acidosis of the newborn (P74.0)
Inclusion terms
Alternative wording in documentation that is classified to P74.421.
- Hyperchloremic metabolic acidosis
Excludes2 — not included here — inherited from Chapter 16
The conditions below are not part of P74.421, but a patient may have both at the same time. When documentation supports it, P74.421 and the excluded code may both be reported.
How long has P74.421 existed?
P74.421 first appears in FY2019.
Derived from the official order files for FY2016–FY2026. FY2017 and FY2020 publish no order file, so those years are not covered.