2026 ICD-10-CM Diagnosis Code P92.3Underfeeding of newborn

ICD-10-CM Codes›P00–P96›P90-P96›P92

ICD-10-CM P92.3
CMSSource: CMS FY 2026 ICD-10-CM dataset · Effective Oct 1, 2025 – Sep 30, 2026

P92.3 is a billable ICD-10-CM diagnosis code for underfeeding 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 underfeeding in newborn. In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Neonatal digestive and feeding disorders.

Code Identity

ICD-10-CM Code
P92.3
Billable Status
Yes — Valid for Submission
Code Describes
Underfeeding of newborn
Short Description
Underfeeding of newborn
Same as the full description in the CMS dataset.
Parent Code
P92
Feeding problems of newborn

Code Classification

ChapterP00–P96Certain conditions originating in the perinatal period
SectionP90-P96Other disorders originating in the perinatal period
CategoryP92Feeding problems of newborn
This CodeP92.3Underfeeding of newborn

Approximate SynonymsGuidance

Alternate terms and clinical phrases that map to this code.

  • Underfeeding in newborn

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.

    • Problem(with) (related to)
      • feeding (elderly) (infant) NOS
        • newborn
          • underfeeding
    • Underfeeding, newborn

Clinical ClassificationClinical

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

CCSR PNL012
Neonatal digestive and feeding disorders
Default principal diagnosis: inpatient Yes · outpatient Yes

Patient EducationClinical

Common Infant and Newborn Problems

It is hard when your baby is sick. Common health problems in babies include colds, coughs, fevers, and vomiting. Babies also commonly have skin problems, like diaper rash or cradle cap.

Read the full article at MedlinePlus

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

Convert P92.3 to ICD-9-CMHistory

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

ICD-9-CM
779.31 NB feeding problems
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 P92.3Overview

Is P92.3 (Feeding problems of newborn) a billable code?

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

What is the ICD-9 equivalent of P92.3?

Under the General Equivalence Mappings, underfeeding of newborn converts to ICD-9-CM 779.31 (NB feeding problems). 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.