2026 ICD-10-CM Diagnosis Code P08.22Prolonged gestation of newborn

ICD-10-CM Codes›P00–P96›P05-P08›P08

ICD-10-CM P08.22
CMSSource: CMS FY 2026 ICD-10-CM dataset · Effective Oct 1, 2025 – Sep 30, 2026

P08.22 is a billable ICD-10-CM diagnosis code for prolonged gestation 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 gestation abnormality. In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Other specified and unspecified perinatal conditions.

Code Identity

ICD-10-CM Code
P08.22
Billable Status
Yes — Valid for Submission
Code Describes
Prolonged gestation of newborn
Short Description
Prolonged gestation of newborn
Same as the full description in the CMS dataset.
Parent Code
P08.2
Late newborn, not heavy for gestational age

Code Classification

ChapterP00–P96Certain conditions originating in the perinatal period
SectionP05-P08Disorders of newborn related to length of gestation and fetal growth
CategoryP08Disorders of newborn related to long gestation and high birth weight
This CodeP08.22Prolonged gestation of newborn

Approximate SynonymsGuidance

Alternate terms and clinical phrases that map to this code.

  • Gestation abnormality
  • Long fetal gestation
  • Postmature infancy
  • Postmaturity syndrome
  • Post-term infant - 42 weeks plus

Tabular List NotesGuidance

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

Inclusion Terms

  • Newborn with gestation period over 42 completed weeks (294 days or more), not heavy- or large-for-dates.
  • Postmaturity NOS

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.

    • Newborn(infant) (liveborn) (singleton)
      • prolonged gestation (over 42 completed weeks)
    • Postmaturity, postmature(over 42 weeks)
      • newborn
    • Prolonged, prolongation(of)
      • gestation (over 42 completed weeks)
        • newborn

Clinical ClassificationClinical

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

CCSR PNL013
Other specified and unspecified perinatal conditions
Default principal diagnosis: inpatient Yes · outpatient Yes

Patient EducationClinical

Childbirth Problems

Childbirth is the process of giving birth to a baby. It includes labor and delivery. Usually everything goes well, but problems can happen. They may cause a risk to the mother, baby, or both. Some of the more common childbirth problems include:

Read the full article at MedlinePlus

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

Convert P08.22 to ICD-9-CMHistory

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

ICD-9-CM
766.22 Prolong gestation-infant
Exact Match The mapping is direct, with no qualifiers.

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 P08.22Overview

Is P08.22 (Late newborn, not heavy for gestational age) a billable code?

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

What is the ICD-9 equivalent of P08.22?

Under the General Equivalence Mappings, prolonged gestation of newborn converts to ICD-9-CM 766.22 (prolong gestation-infant). The mapping is a direct match.

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.