2026 ICD-10-CM Diagnosis Code P55.8Other hemolytic diseases of newborn

ICD-10-CM Codes›P00–P96›P50-P61›P55

ICD-10-CM P55.8
CMSSource: CMS FY 2026 ICD-10-CM dataset · Effective Oct 1, 2025 – Sep 30, 2026

P55.8 is a billable ICD-10-CM diagnosis code for other hemolytic diseases of newborn. It is valid on HIPAA claims for fiscal year 2026 (October 1, 2025 through September 30, 2026). In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Hemolytic jaundice and perinatal jaundice.

Code Identity

ICD-10-CM Code
P55.8
Billable Status
Yes — Valid for Submission
Code Describes
Other hemolytic diseases of newborn
Short Description
Other hemolytic diseases of newborn
Same as the full description in the CMS dataset.
Parent Code
P55
Hemolytic disease of newborn

Code Classification

ChapterP00–P96Certain conditions originating in the perinatal period
SectionP50-P61Hemorrhagic and hematological disorders of newborn
CategoryP55Hemolytic disease of newborn
This CodeP55.8Other hemolytic diseases of newborn

Approximate SynonymsGuidance

Alternate terms and clinical phrases that map to this code.

  • Atypical isoimmunization of newborn
  • Autoimmune hemolytic anemia mixed type
  • Chronic hemolytic anemia
  • Cold agglutinin disease due to Mycoplasma pneumonia
  • Cold autoimmune hemolytic anemia
  • Duffy isoimmunization of the newborn
  • Hemolytic disease of fetus OR newborn due to isoimmunization
  • Hemolytic disease of the newborn due to non-ABO, non-Rh isoimmunization
  • Infection caused by Mycoplasma pneumoniae
  • Isoimmunization from non-ABO, non-Rh blood-group incompatibility affecting pregnancy
  • Kell isoimmunization of the newborn
  • Kidd isoimmunization of the newborn
  • Late anemia due to isoimmunization
  • Neonatal anemia
  • Neonatal autoimmune hemolytic anemia
  • Neonatal jaundice due to glucose-6-phosphate dehydrogenase deficiency
  • Warm autoimmune hemolytic anemia

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.

    • Disease, diseased
      • hemolytic (newborn)
        • due to or with
          • incompatibility
            • blood (group) (Duffy) (K) (Kell) (Kidd) (Lewis) (M) (S) NEC
    • Disease, diseased
      • hemolytic (newborn)
        • specified type NEC
    • Incompatibility
      • blood (group) (Duffy) (K) (Kell) (Kidd) (Lewis) (M) (S) NEC
        • newborn
    • Isoimmunization NEC
      • newborn
        • specified type NEC
    • Jaundice(yellow)
      • newborn
        • due to or associated with
          • hemolytic disease
            • specified NEC

Clinical ClassificationClinical

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

CCSR PNL007
Hemolytic jaundice and perinatal jaundice
Default principal diagnosis: inpatient Yes · outpatient Yes

Clinical InformationClinical

  • Hemolytic Jaundice

    jaundice occurring as a result of red blood cell rupture.

Patient EducationClinical

Blood Disorders

Your blood is living tissue made up of liquid and solids. The liquid part, called plasma, is made of water, salts and protein. Over half of your blood is plasma. The solid part of your blood contains red blood cells, white blood cells and platelets.

Read the full article at MedlinePlus

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

Convert P55.8 to ICD-9-CMHistory

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

ICD-9-CM
773.2 NB hemolyt dis-isoim NEC
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 P55.8Overview

Is P55.8 (Hemolytic disease of newborn) a billable code?

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

What is the ICD-9 equivalent of P55.8?

Under the General Equivalence Mappings, other hemolytic diseases of newborn converts to ICD-9-CM 773.2 (NB hemolyt dis-isoim NEC). 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.