P55.1

Billable

ChapterP00–P96

Ranksubcategory

Official Description

ABO isoimmunization of newborn

Metadata & Insights

•2026 ICD-10-CM Edition - Effective October 1, 2025.
•Billable/specific code (valid for reimbursement).
•Chapter 16: Certain Conditions Originating in the Perinatal Period (P00-P96).

General instructions are available for the parent sections:

View CH16 Notes View P50-P61 Notes

Clinical Hierarchy

CH16Certain conditions originating in the perinatal period (P00-P96)

P50-P61Hemorrhagic and hematological disorders of newborn (P50-P61)

P55Hemolytic disease of newborn

P55.1ABO isoimmunization of newborn

Applicable Ancestor Context

The following parent sections contain instructions or notes that apply to P55.1:

blockP50-P61

Hemorrhagic and hematological disorders of newborn (P50-P61)

View context instructions

chapterCH16

Certain conditions originating in the perinatal period (P00-P96)

View context instructions

Alphabetic Index Mentions

These are Diagnosis Index lookup paths that route to P55.1. Use them as entry terms for search, then confirm final coding instructions in the Tabular List and notes above.

11 raw paths

Abocclusion1 unique routes

hemolytic disease (newborn)→P55.1

Anemia (essential) (general) (hemoglobin deficiency) (infantile) (primary) (profound)1 unique routes

newborn

due to

ABO (antibodies, isoimmunization, maternal/fetal incompatibility)→P55.1

Disease, diseased1 unique routes

hemolytic (newborn)

due to or with

incompatibility

ABO (blood group)→P55.1

Erythroblastosis (fetalis) (newborn)1 unique routes

due to

ABO (antibodies) (incompatibility) (isoimmunization)→P55.1

Immunization1 unique routes

ABO

in newborn→P55.1

Incompatibility1 unique routes

ABO

newborn→P55.1

Isoimmunization NEC1 unique routes

newborn

ABO (blood groups)→P55.1

Jaundice (yellow)4 unique routes

newborn(4 variants)

due to or associated with(4 variants)

ABO(3 variants)

antibodies→P55.1

incompatibility, maternal/fetal→P55.1

isoimmunization→P55.1

hemolytic disease

ABO isoimmunization→P55.1

MS-DRG Classification

2026 v43.1

This code is grouped within the following Diagnosis Related Group(s) for clinical reimbursement:

DRG 794

Neonate with Other Significant Problems

Cross Reference

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