2026 ICD-10-CM Diagnosis Code P91.3Neonatal cerebral irritability

ICD-10-CM Codes›P00–P96›P90-P96›P91

ICD-10-CM P91.3
CMSSource: CMS FY 2026 ICD-10-CM dataset · Effective Oct 1, 2025 – Sep 30, 2026

P91.3 is a billable ICD-10-CM diagnosis code for neonatal cerebral irritability. It is valid on HIPAA claims for fiscal year 2026 (October 1, 2025 through September 30, 2026). Coders also document this condition as cerebral irritability in newborn. In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Neonatal cerebral disorders.

Code Identity

ICD-10-CM Code
P91.3
Billable Status
Yes — Valid for Submission
Code Describes
Neonatal cerebral irritability
Short Description
Neonatal cerebral irritability
Same as the full description in the CMS dataset.
Parent Code
P91
Other disturbances of cerebral status of newborn

Code Classification

ChapterP00–P96Certain conditions originating in the perinatal period
SectionP90-P96Other disorders originating in the perinatal period
CategoryP91Other disturbances of cerebral status of newborn
This CodeP91.3Neonatal cerebral irritability

Approximate SynonymsGuidance

Alternate terms and clinical phrases that map to this code.

  • Cerebral irritability in newborn
  • Cerebral irritation

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.

    • Irritable, irritability
      • cerebral, in newborn

Clinical ClassificationClinical

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

CCSR PNL004
Neonatal cerebral disorders
Default principal diagnosis: inpatient Yes · outpatient Yes

Patient EducationClinical

Brain Diseases

Your brain is the control center of your body. It controls your thoughts, memory, speech, and movement. It regulates the function of many organs. It's part of your nervous system, which also includes your spinal cord and peripheral nerves. The nervous system sends signals between your brain and the rest of the body.

Read the full article at MedlinePlus

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

Convert P91.3 to ICD-9-CMHistory

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

ICD-9-CM
779.2 Cns dysfunction syn NB
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 P91.3Overview

Is P91.3 (Other disturbances of cerebral status of newborn) a billable code?

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

What is the ICD-9 equivalent of P91.3?

Under the General Equivalence Mappings, neonatal cerebral irritability converts to ICD-9-CM 779.2 (cns dysfunction syn NB). 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.