2026 ICD-10-CM Diagnosis Code P91.88Other specified disturbances of cerebral status of newborn

ICD-10-CM Codes›P00–P96›P90-P96›P91

ICD-10-CM P91.88
CMSSource: CMS FY 2026 ICD-10-CM dataset · Effective Oct 1, 2025 – Sep 30, 2026

P91.88 is a billable ICD-10-CM diagnosis code for other specified disturbances of cerebral status of newborn. It is valid on HIPAA claims for fiscal year 2026 (October 1, 2025 through September 30, 2026). The code is exempt from POA reporting. Coders also document this condition as alternating hemiplegia. In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Neonatal cerebral disorders.

Code Identity

ICD-10-CM Code
P91.88
Billable Status
Yes — Valid for Submission
Code Describes
Other specified disturbances of cerebral status of newborn
Short Description
Other specified disturbances of cerebral status of newborn
Same as the full description in the CMS dataset.
Parent Code
P91.8
Other specified 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 CodeP91.88Other specified disturbances of cerebral status of newborn

Present on Admission (POA)Billing

P91.88 is exempt from POA reporting on inpatient claims to general acute care hospitals. Review other POA exempt codes.

Approximate SynonymsGuidance

Alternate terms and clinical phrases that map to this code.

  • Alternating hemiplegia
  • Alternating hemiplegia of childhood
  • Benign nocturnal alternating hemiplegia of childhood
  • Cerebral ventricular distension

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.

    • Disturbance(s)
      • cerebral
        • status, newborn
          • specified NEC
    • Failure, failed
      • vital centers, newborn
    • Hemiplegia
      • newborn NEC

Clinical ClassificationClinical

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

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

Convert P91.88 to ICD-9-CMHistory

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

ICD-9-CM
779.1 NB cereb irrit NEC/NOS
Approximate The match is approximate rather than exact.

Code History & ChangesHistory

Replacement P91.88 replaces the following previously assigned code(s):

  • P91.8 - Other specified disturbances of cerebral status of newborn
FY 2018AddedAdded to the ICD-10-CM code setEffective October 1, 2017.
FY 2019–2025No changes
FY 2026CurrentCurrent code set, no changesEffective October 1, 2025 through September 30, 2026.

Questions About P91.88Overview

Is P91.88 (Other specified disturbances of cerebral status of newborn) a billable code?

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

Is P91.88 exempt from POA reporting?

Yes. CMS lists this code among those exempt from present on admission reporting, so hospitals do not assign a POA indicator for other specified disturbances of cerebral status of newborn on inpatient claims.

What is the ICD-9 equivalent of P91.88?

Under the General Equivalence Mappings, other specified disturbances of cerebral status of newborn converts to ICD-9-CM 779.1 (NB cereb irrit NEC/NOS). 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.