2026 ICD-10-CM Diagnosis Code P74.49Other transitory electrolyte disturbance of newborn

ICD-10-CM Codes›P00–P96›P70-P74›P74

ICD-10-CM P74.49
CMSSource: CMS FY 2026 ICD-10-CM dataset · Effective Oct 1, 2025 – Sep 30, 2026

P74.49 is a billable ICD-10-CM diagnosis code for other transitory electrolyte disturbance of newborn. It is valid on HIPAA claims for fiscal year 2026 (October 1, 2025 through September 30, 2026). In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Other specified and unspecified perinatal conditions.

Code Identity

ICD-10-CM Code
P74.49
Billable Status
Yes — Valid for Submission
Code Describes
Other transitory electrolyte disturbance of newborn
Short Description
Other transitory electrolyte disturbance of newborn
Same as the full description in the CMS dataset.
Parent Code
P74.4
Other transitory electrolyte disturbances of newborn

Code Classification

ChapterP00–P96Certain conditions originating in the perinatal period
SectionP70-P74Transitory endocrine and metabolic disorders specific to newborn
CategoryP74Other transitory neonatal electrolyte and metabolic disturbances
This CodeP74.49Other transitory electrolyte disturbance of newborn

Approximate SynonymsGuidance

Alternate terms and clinical phrases that map to this code.

  • Chloride disorder
  • Depletion of electrolyte
  • Disturbances of potassium balance of newborn
  • Disturbances of sodium balance of newborn
  • Electrolyte imbalance
  • Increased anion gap
  • Isolated hyperchlorhidrosis
  • Perinatal disorder of electrolytes
  • Potassium disorder
  • Reduced anion gap
  • Reversed anion gap
  • Sodium disorder
  • Transitory neonatal electrolyte disturbance

Index to Diseases and InjuriesGuidance

Alphabetical index entries that point to this code.

External Cause of Injuries IndexGuidance

References for this code in the External Cause of Injuries Index.

    • Disturbance(s)
      • electrolyte
        • newborn, transitory
    • Disturbance(s)
      • electrolyte
        • newborn, transitory
          • specified type NEC
    • Imbalance
      • electrolyte
        • neonatal, transitory NEC

Clinical ClassificationClinical

AHRQ’s CCSR groups this code into broader clinical categories.

CCSR PNL013
Other specified and unspecified perinatal conditions
Default principal diagnosis: inpatient Yes · outpatient Yes

Clinical InformationClinical

  • Electrolyte Imbalance

    higher or lower than normal values for the serum electrolytes; usually affecting na, k, chl, co2, glucose, bun.

Code History & ChangesHistory

Replacement P74.49 replaces the following previously assigned code(s):

  • P74.4 - Other transitory electrolyte disturbances of newborn
FY 2019AddedAdded to the ICD-10-CM code setEffective October 1, 2018.
FY 2020–2025No changes
FY 2026CurrentCurrent code set, no changesEffective October 1, 2025 through September 30, 2026.

Questions About P74.49Overview

Is P74.49 (Other transitory electrolyte disturbances of newborn) a billable code?

Yes. This is a billable ICD-10-CM code, specific enough to report other transitory electrolyte disturbance of newborn on HIPAA-covered claims from October 1, 2025 through September 30, 2026.

Footnotes

[1] Not chronic - A diagnosis code that does not fit the criteria for chronic condition (duration, ongoing medical treatment, and limitations) is considered not chronic. Some codes designated as not chronic are acute conditions. Other diagnosis codes that indicate a possible chronic condition, but for which the duration of the illness is not specified in the code description (i.e., we do not know the condition has lasted 12 months or longer) also are considered not chronic.