2026 ICD-10-CM Diagnosis Code P74.0Late metabolic acidosis of newborn

ICD-10-CM Codes›P00–P96›P70-P74›P74

ICD-10-CM P74.0
CMSSource: CMS FY 2026 ICD-10-CM dataset · Effective Oct 1, 2025 – Sep 30, 2026

P74.0 is a billable ICD-10-CM diagnosis code for late metabolic acidosis of newborn. It is valid on HIPAA claims for fiscal year 2026 (October 1, 2025 through September 30, 2026). Coders also document this condition as infantile encephalopathy AND lactic acidosis. In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Other specified and unspecified perinatal conditions.

Code Identity

ICD-10-CM Code
P74.0
Billable Status
Yes — Valid for Submission
Code Describes
Late metabolic acidosis of newborn
Short Description
Late metabolic acidosis of newborn
Same as the full description in the CMS dataset.
Parent Code
P74
Other transitory neonatal electrolyte and metabolic disturbances

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 CodeP74.0Late metabolic acidosis of newborn

Approximate SynonymsGuidance

Alternate terms and clinical phrases that map to this code.

  • Infantile encephalopathy AND lactic acidosis
  • Lactic acidosis
  • Late metabolic acidosis of newborn
  • Mitochondrial myopathy, lactic acidosis, deafness syndrome
  • Neonatal acidosis

Tabular List NotesGuidance

Coding notes and annotation back-references applicable to this code.

Type 1 Excludes

  • fetal metabolic acidosis of newborn P19

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.

    • Acidosis(lactic)
      • metabolic NEC
        • late, of newborn
    • Newborn(infant) (liveborn) (singleton)
      • late metabolic acidosis

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

  • Lactic Acidosis

    metabolic acidosis characterized by the accumulation of lactate in the body. it is caused by tissue hypoxia.

  • MELAS Syndrome|MELAS|Mitochondrial Encephalomyopathy, Lactic Acidosis and Stroke

    a rare progressive neurodegenerative disorder characterized by mitochondrial myopathy, encephalopathy, lactic acidosis, and stroke-like episodes.

Patient EducationClinical

Metabolic Disorders

Metabolism is the process your body uses to get or make energy from the food you eat. Food is made up of proteins, carbohydrates, and fats. Chemicals in your digestive system break the food parts down into sugars and acids, your body's fuel.

Read the full article at MedlinePlus

Courtesy of MedlinePlus, a service of the U.S. National Library of Medicine.

Convert P74.0 to ICD-9-CMHistory

The closest ICD-9-CM equivalents under the General Equivalence Mappings.

ICD-9-CM
775.7 Late metab acidosis NB
Exact Match The mapping is direct, with no qualifiers.

Code HistoryHistory

FY 2016AddedAdded to the ICD-10-CM code setEffective October 1, 2015, the first year of ICD-10-CM.
FY 2017–2025No changes
FY 2026CurrentCurrent code set, no changesEffective October 1, 2025 through September 30, 2026.

Questions About P74.0Overview

Is P74.0 a billable code?

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

What is the ICD-9 equivalent of P74.0?

Under the General Equivalence Mappings, late metabolic acidosis of newborn converts to ICD-9-CM 775.7 (late metab acidosis NB). The mapping is a direct match.

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.