2026 ICD-10-CM Diagnosis Code P19.1Metabolic acidemia in newborn first noted during labor

ICD-10-CM Codes›P00–P96›P19-P29›P19

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

P19.1 is a billable ICD-10-CM diagnosis code for metabolic acidemia in newborn first noted during labor. It is valid on HIPAA claims for fiscal year 2026 (October 1, 2025 through September 30, 2026) and groups to MS-DRG 794. In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Neonatal acidemia and hypoxia.

Code Identity

ICD-10-CM Code
P19.1
Billable Status
Yes — Valid for Submission
Code Describes
Metabolic acidemia in newborn first noted during labor
Short Description
Metabolic acidemia in newborn first noted during labor
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 CodeP19.1Metabolic acidemia in newborn first noted during labor

Index to Diseases and InjuriesGuidance

Alphabetical index entries that point to this code.

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 P19.1 to ICD-9-CMHistory

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

ICD-9-CM
768.3 Fetal distrs dur lab/del
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 2017–2025No changes
FY 2026CurrentCurrent code set, no changesEffective October 1, 2025 through September 30, 2026.

Questions About P19.1Overview

What is the ICD-10 code for metabolic acidemia in newborn first noted during labor?

The ICD-10-CM code for metabolic acidemia in newborn first noted during labor is P19.1 (sometimes written as P191). It is billable on HIPAA-covered claims from October 1, 2025 through September 30, 2026.

Is P19.1 (Metabolic acidemia in newborn) a billable code?

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

What MS-DRG does P19.1 group to?

When metabolic acidemia in newborn first noted during labor is the principal diagnosis on an inpatient stay, it groups to MS-DRG 794 (neonate with Other Significant Problems), which carries a relative weight of 1.4759. Higher weights mean higher Medicare reimbursement.

What is the ICD-9 equivalent of P19.1?

Under the General Equivalence Mappings, metabolic acidemia in newborn first noted during labor converts to ICD-9-CM 768.3 (fetal distrs dur lab/del). The mapping is approximate, so confirm the match fits the documentation.