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ICD-10-CM 2027 diagnosis code

P74.32Hypokalemia of newborn

✓ Billable / specific

P74.32 is a valid, billable ICD-10-CM code for hypokalemia of newborn. It can be reported on claims for dates of service from October 1, 2026 – September 30, 2027.

Code last changed in FY2019 (effective October 1, 2018). Source: official FY2027 ICD-10-CM release from CDC/NCHS and CMS. Page updated September 29, 2026. About our data

About P74.32

P74.32 is the ICD-10-CM diagnosis code for Hypokalemia 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 P74.3 (disturbances of potassium balance of newborn), P74.32 is specifically for Hypokalemia of newborn. Related codes cover Hyperkalemia of newborn (P74.31).

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 was added in FY2019, effective October 1, 2018.

Notes that apply from higher levels

Instructions written at a parent level also apply to P74.32.

Broader instructions also apply from P70-P74 Transitory endocrine and metabolic disorders specific to newborn and Chapter 16: Certain conditions originating in the perinatal period.

Alphabetic index entries

3 entries

Terms in the official ICD-10-CM index that lead to P74.32.

MS-DRG v44.0 grouping

All DRGs →

Inpatient MS-DRGs this diagnosis can group to, as the principal or a secondary diagnosis, depending on the rest of the claim.

MDC 15 · Newborns and Other Neonates with Conditions Originating in the Perinatal Period

MDC 15 · Newborns and Other Neonates with Conditions Originating in the Perinatal Period

Code history

  1. 2016
  2. 2017
  3. 2018
  4. 2019
  5. 2020
  6. 2021
  7. 2022
  8. 2023
  9. 2024
  10. 2025
  11. 2026
  12. 2027
  • FY2019 (effective 10/1/2018): Added
  • No changes since FY2019.

Common questions about P74.32

Is P74.32 billable?

Yes. P74.32 is a billable/specific ICD-10-CM code valid for FY2027 (October 1, 2026 – September 30, 2027).

Can P74.32 be used as a principal diagnosis?

Yes. The Medicare Code Editor doesn't restrict P74.32 as a principal diagnosis.

Is P74.32 a CC or MCC?

No. P74.32 is neither a CC nor an MCC under MS-DRG v44.0.

What DRG does P74.32 group to?

P74.32 is used in the MS-DRG v44.0 logic for MS-DRG 791 (Prematurity with Major Problems) and MS-DRG 793 (Full Term Neonate with Major Problems). Which one applies depends on whether it is the principal diagnosis and on the rest of the claim.