2027 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 2027 ICD-10-CM dataset · Effective Oct 1, 2026 – Sep 30, 2027

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 2027 (October 1, 2026 through September 30, 2027) and groups to MS-DRG 794. 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
  • Neonatal metabolic acidemia
  • Renal acidemia

Instructional NotesGuidance

Instructions from the official ICD-10-CM Tabular List that apply to P19.9: its own notes plus those printed at P19 and Chapter 16. A note printed at a category, block or chapter applies to every code under it.

Includes

Further defines, or gives examples of, the content of the category.

From P19 Metabolic acidemia in newborn applies to 4 codes
  • metabolic acidemia in newborn
From Chapter 16 (P00-P96) Certain conditions originating in the perinatal period applies to 463 codes
  • conditions that have their origin in the fetal or perinatal period (before birth through the first 28 days after birth) even if morbidity occurs later

Excludes2

Not included here: the excluded condition is not part of this code, but a patient may have both, so both codes may be reported.

From Chapter 16 (P00-P96) Certain conditions originating in the perinatal period applies to 463 codes
  • congenital malformations, deformations and chromosomal abnormalities (Q00-Q99)
  • endocrine, nutritional and metabolic diseases (E00-E88)
  • injury, poisoning and certain other consequences of external causes (S00-T88)
  • neoplasms (C00-D49)
  • tetanus neonatorum (A33)

Notes

General instructions on how these codes are used.

From Chapter 16 (P00-P96) Certain conditions originating in the perinatal period applies to 463 codes
  • Codes from this chapter are for use on newborn records only, never on maternal records

Source: CMS ICD-10-CM Tabular List. How to read instructional notes.

Referenced in Other NotesGuidance

Instructional notes printed at other codes that name P19.9, its category, or a range that includes it.

Excludes1 2

These codes carry an Excludes1 note naming P19.9: they are not reported together with it, unless the two conditions are unrelated.

  • E87 Other disorders of fluid, electrolyte and acid-base balance
    metabolic acidemia in newborn, unspecified (P19.9)
  • P74.0 Late metabolic acidosis of newborn
    (fetal) metabolic acidosis of newborn (P19) names P19, which includes this code

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 P19.9 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 2025–2026No changes
FY 2027CurrentCurrent code set, no changesEffective October 1, 2026 through September 30, 2027.

Questions About P19.9Overview

What is the ICD-10 code for metabolic acidemia in newborn, unspecified?

The ICD-10-CM code for metabolic acidemia in newborn, unspecified is P19.9 (sometimes written as P199). It is billable on HIPAA-covered claims from October 1, 2026 through September 30, 2027.

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, 2026 through September 30, 2027.

What MS-DRG does P19.9 group to?

When metabolic acidemia in newborn, unspecified 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 1.4934. Higher weights mean higher Medicare reimbursement.

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.