P55.1 – ABO isoimmunization of newborn
ICD-10-CM 2027 diagnosis code · Hemorrhagic and hematological disorders of newborn
ICD-10-CM code
P55.1
- Code
P55.1(claims format:P551)- Description
- ABO isoimmunization of newborn
- Billable
- Yes – valid for HIPAA-covered transactions
- Valid for
- Dates of service October 1, 2026 – September 30, 2027 (FY2027)
- Chapter
- 16. Certain conditions originating in the perinatal period (P00-P96)
- Block
- P50-P61 Hemorrhagic and hematological disorders of newborn
- Parent codes
- P55
Notes inherited from parent codes
Instructional notes at a category or block level apply to every code below it.
Block P50-P61
Index terms for P55.1
Entries in the ICD-10-CM alphabetic index that lead to this code:
- Anemia, newborn, due to, ABO
- Erythroblastosis, due to, ABO
- Immunization, ABO, in newborn
- Incompatibility, ABO, newborn
- Abocclusion, hemolytic disease
- Isoimmunization NEC, newborn, ABO
- Jaundice, newborn, due to or associated with, ABO, antibodies
- Disease, diseased, hemolytic, due to or with, incompatibility, ABO
- Jaundice, newborn, due to or associated with, ABO, isoimmunization
- Jaundice, newborn, due to or associated with, ABO, incompatibility, maternal/fetal
- Jaundice, newborn, due to or associated with, hemolytic disease, ABO isoimmunization
Related codes in P55
Frequently asked questions
What is ICD-10 code P55.1?
P55.1 is the ICD-10-CM code for aBO isoimmunization of newborn, in the block P50-P61 (Hemorrhagic and hematological disorders of newborn).
Is P55.1 a billable code?
Yes. P55.1 is a billable/specific code that can be used to indicate a diagnosis for reimbursement purposes.
What category does P55.1 belong to?
It belongs to category P55 – Hemolytic disease of newborn.
Source: CDC/NCHS ICD-10-CM FY2027 code files, tabular list and index. Reference only – code assignment must follow the official ICD-10-CM guidelines and documentation in the medical record.