2026 ICD-10-CM Diagnosis Code P04.9Newborn affected by maternal noxious substance, unspecified

ICD-10-CM Codes›P00–P96›P00-P04›P04

ICD-10-CM P04.9
CMSSource: CMS FY 2026 ICD-10-CM dataset · Effective Oct 1, 2025 – Sep 30, 2026

P04.9 is a billable ICD-10-CM diagnosis code for newborn affected by maternal noxious substance, unspecified. It is valid on HIPAA claims for fiscal year 2026 (October 1, 2025 through September 30, 2026). Coders also document this condition as neonatal disorder caused by noxious substance transmitted via breast milk. In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Newborn affected by maternal conditions or complications of labor/delivery.

Code Identity

ICD-10-CM Code
P04.9
Billable Status
Yes — Valid for Submission
Code Describes
Newborn affected by maternal noxious substance, unspecified
Short Description
Newborn affected by maternal noxious substance, unspecified
Same as the full description in the CMS dataset.
Parent Code
P04
Newborn affected by noxious substances transmitted via placenta or breast milk

Code Classification

ChapterP00–P96Certain conditions originating in the perinatal period
SectionP00-P04Newborn affected by maternal factors and by complications of pregnancy, labor, and delivery
CategoryP04Newborn affected by noxious substances transmitted via placenta or breast milk
This CodeP04.9Newborn affected by maternal noxious substance, unspecified

Approximate SynonymsGuidance

Alternate terms and clinical phrases that map to this code.

  • Neonatal disorder caused by noxious substance transmitted via breast milk
  • Neonatal disorder caused by substance transmitted via breast milk
  • Neonatal hyperbilirubinemia caused by substance transmitted from mother
  • Neonatal jaundice caused by substance transmitted via breast milk

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.

    • Absorption
      • chemical
        • through placenta (newborn)
    • Newborn(infant) (liveborn) (singleton)
      • affected by
        • noxious substances transmitted via placenta or breast milk
    • Noxious
      • substances transmitted through placenta or breast milk

Clinical ClassificationClinical

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

CCSR PNL010
Newborn affected by maternal conditions or complications of labor/delivery
Default principal diagnosis: inpatient Yes · outpatient Yes

Patient EducationClinical

Pregnancy and Substance Use

During pregnancy, there are many things you can do to keep yourself and your baby healthy. They include getting regular prenatal care, eating healthy, and staying active. But it's also very important to avoid substances that could be harmful to you and your baby, such as tobacco, alcohol, and drugs.

Read the full article at MedlinePlus

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

Convert P04.9 to ICD-9-CMHistory

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

ICD-9-CM
760.70 Nox sub NOS aff NB/fetus
Approximate The match is approximate rather than exact.
ICD-9-CM
760.79 Nox sub NEC aff NB/fetus
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 P04.9Overview

Is P04.9 a billable code?

Yes. This is a billable ICD-10-CM code, specific enough to report newborn affected by maternal noxious substance, unspecified on HIPAA-covered claims from October 1, 2025 through September 30, 2026.

What is the ICD-9 equivalent of P04.9?

Under the General Equivalence Mappings, newborn affected by maternal noxious substance, unspecified converts to ICD-9-CM 760.70 (nox sub NOS aff NB/fetus) and 760.79 (nox sub NEC aff NB/fetus). 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.