2026 ICD-10-CM Diagnosis Code P19.9Metabolic acidemia in newborn, unspecified

ICD-10-CM Codes›P00–P96›P19-P29›P19

ICD-10-CM P19.9
CMSSource: CMS FY 2026 ICD-10-CM dataset · Effective Oct 1, 2025 – Sep 30, 2026

P19.9 is a billable ICD-10-CM diagnosis code for metabolic acidemia in newborn, unspecified. It is valid on HIPAA claims for fiscal year 2026 (October 1, 2025 through September 30, 2026). Coders also document this condition as birth asphyxia with metabolic acidemia of cord blood. In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Neonatal acidemia and hypoxia.

Code Identity

ICD-10-CM Code
P19.9
Billable Status
Yes — Valid for Submission
Code Describes
Metabolic acidemia in newborn, unspecified
Short Description
Metabolic acidemia in newborn, unspecified
Same as the full description in the CMS dataset.
Parent Code
P19
Metabolic acidemia in newborn

Code Classification

ChapterP00–P96Certain conditions originating in the perinatal period
SectionP19-P29Respiratory and cardiovascular disorders specific to the perinatal period
CategoryP19Metabolic acidemia in newborn
This CodeP19.9Metabolic acidemia in newborn, unspecified

Approximate SynonymsGuidance

Alternate terms and clinical phrases that map to this code.

  • Birth asphyxia with metabolic acidemia of cord blood
  • Lactic acidemia
  • Metabolic acidemia in newborn
  • Neonatal metabolic acidemia
  • Renal acidemia

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.

    • Acidemia
      • metabolic
        • newborn

Clinical ClassificationClinical

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

CCSR PNL003
Neonatal acidemia and hypoxia
Default principal diagnosis: inpatient Yes · outpatient Yes

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 P19.9 to ICD-9-CMHistory

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

ICD-9-CM
768.4 Fetal distress NOS
Approximate The match is approximate rather than exact.

Code HistoryHistory

FY 2016AddedAdded to the ICD-10-CM code setEffective October 1, 2015, the first year of ICD-10-CM.
FY 2017–2023No changes
FY 2024RevisedCode revised
FY 2025No changes
FY 2026CurrentCurrent code set, no changesEffective October 1, 2025 through September 30, 2026.

Questions About P19.9Overview

Is P19.9 (Metabolic acidemia in newborn) a billable code?

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

What is the ICD-9 equivalent of P19.9?

Under the General Equivalence Mappings, metabolic acidemia in newborn, unspecified converts to ICD-9-CM 768.4 (fetal distress NOS). The mapping is approximate, so confirm the match fits the documentation.

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.