P55.9

ICD-10-CM Coding Rules

• P55.9

Approximate Synonyms

• Hemolytic disease of fetus or newborn due to isoimmunization

• Isoimmune hemolytic disease, fetus or newborn

• Neonatal anemia

• Newborn affected by late anemia

Clinical Information

• A condition characterized by the abnormal presence of erythroblasts in the circulation of the fetus or newborns. It is a disorder due to blood group incompatibility, such as the maternal alloimmunization by fetal antigen rh factors leading to hemolysis of erythrocytes, hemolytic anemia anemia, hemolytic), general edema hydrops fetalis), and severe jaundice in newborn.

• Hemolytic anemia of the fetus or newborn caused by transplacental transmission of maternally formed antibody, usually secondary to an incompatibility between the blood groups of mother and offspring.

Details

• P55.9 is a billable/specific ICD-10-CM code that can be used to indicate a diagnosis for reimbursement purposes.

• The 2023 edition of ICD-10-CM P55.9 became effective on October 1, 2022.

• This is the American ICD-10-CM version of P55.9 – other international versions of ICD-10 P55.9 may differ.