2026 ICD-10-CM Diagnosis Code P91.0Neonatal cerebral ischemia

ICD-10-CM Codes›P00–P96›P90-P96›P91

ICD-10-CM P91.0
CMSSource: CMS FY 2026 ICD-10-CM dataset · Effective Oct 1, 2025 – Sep 30, 2026

P91.0 is a billable ICD-10-CM diagnosis code for neonatal cerebral ischemia. It is valid on HIPAA claims for fiscal year 2026 (October 1, 2025 through September 30, 2026). Coders also document this condition as acute cerebral ischemia. In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Neonatal cerebral disorders.

Code Identity

ICD-10-CM Code
P91.0
Billable Status
Yes — Valid for Submission
Code Describes
Neonatal cerebral ischemia
Short Description
Neonatal cerebral ischemia
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 CodeP91.0Neonatal cerebral ischemia

Approximate SynonymsGuidance

Alternate terms and clinical phrases that map to this code.

  • Acute cerebral ischemia
  • Acute cerebrovascular insufficiency
  • Brain stem ischemia
  • Cerebral ischemia
  • Epilepsy due to perinatal cerebral ischemia
  • Neonatal cerebral ischemia
  • Perinatal cerebral ischemia

Tabular List NotesGuidance

Coding notes and annotation back-references applicable to this code.

Type 1 Excludes

  • Neonatal cerebral infarction P91.82

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.

    • Ischemia, ischemic
      • cerebral (chronic) (generalized)
        • newborn
    • Newborn(infant) (liveborn) (singleton)
      • affected by
        • cerebral ischemia

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

Stroke

A stroke happens when there is a loss of blood flow to part of the brain. Your brain cells cannot get the oxygen and nutrients they need from blood, and they start to die within a few minutes. This can cause lasting brain damage, long-term disability, or even death.

The full article covers:

  • What is a stroke?
  • What are the types of stroke?
  • Who is at risk for a stroke?
  • What are the symptoms of a stroke?
  • How are strokes diagnosed?
  • What are the treatments for stroke?
  • Can strokes be prevented?

Read the full article at MedlinePlus

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

Convert P91.0 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 P91.0Overview

Is P91.0 (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 ischemia on HIPAA-covered claims from October 1, 2025 through September 30, 2026.

What is the ICD-9 equivalent of P91.0?

Under the General Equivalence Mappings, neonatal cerebral ischemia 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.