P55.9 ICD-10-CA code: Haemolytic disease of fetus and newborn, unspecified
P55.9 is the ICD-10-CA code for “Haemolytic disease of fetus and newborn, unspecified” in CIHI’s FY 2026–2027 release, in effect from Apr 1, 2026.
Official description
P55.9Haemolytic disease of fetus and newborn, unspecified
Short description: Haemolytic dis of fetus & newborn NOS
ICD-10-CA · Canada · Also written P559
Index terms
Entries in CIHI’s alphabetical index that lead to P55.9. Searching the index by the condition the note names is how coders reach this code.
- Erythroblastosis (fetalis) (newborn)
- Isoimmunization NEC, fetus or newborn
- Anemia, erythroblastic, fetus or newborn
- Anemia, hemolytic, acute, fetus or newborn
- Anemia, congenital, due to isoimmunization NEC
- Disease, diseased, hemolytic (fetus) (newborn)
- Condition, conditions (arising in the perinatal period), hemolysis, autoimmune, newborn
- Condition, conditions (arising in the perinatal period), erythroblastosis (fetalis) (newborn)
- Condition, conditions (arising in the perinatal period), isoimmunization NEC, fetus or newborn
- Condition, conditions (arising in the perinatal period), anemia, erythroblastic, fetus or newborn
- Jaundice (yellow), fetus or newborn (physiological), due to or associated with, isoimmunization NEC
- Condition, conditions (arising in the perinatal period), anemia, congenital, due to isoimmunization NEC
- Condition, conditions (arising in the perinatal period), disease, diseased, hemolytic (fetus) (newborn)
- Jaundice (yellow), fetus or newborn (physiological), due to or associated with, incompatibility, maternal/fetal NEC
- Condition, conditions (arising in the perinatal period), jaundice (yellow), fetus or newborn (physiological), due to or associated with, isoimmunization NEC
- Condition, conditions (arising in the perinatal period), jaundice (yellow), fetus or newborn (physiological), due to or associated with, incompatibility, maternal/fetal NEC
Notes for P55.9
As CIHI prints them, with any note P55.9 takes from the headings above it.
Includes
- Conditions that have their origin in the perinatal period even though death or morbidity occurs laterFrom Chapter 16: Certain conditions originating in the perinatal period (P00-P96)
Excludes
Conditions classified elsewhere.
- Congenital stenosis and stricture of bile ducts (Q44.3)Crigler-Najjar syndrome (E80.5)Dubin-Johnson syndrome (E80.6)Gilbert's syndrome (E80.4)hereditary haemolytic anaemias (D55-D58)From P50-P61 Haemorrhagic and haematological disorders of fetus and newborn
- Congenital malformations, deformations and chromosomal abnormalities (Q00-Q99)endocrine, nutritional and metabolic diseases (E00-E90)injury, poisoning and certain other consequences of external causes (S00-T98)neoplasms (C00-D48)tetanus neonatorum (A33)whooping cough (A37.-)From Chapter 16: Certain conditions originating in the perinatal period (P00-P96)
Where P55.9 sits
- 1ChapterChapter 16: Certain conditions originating in the perinatal period (P00-P96)
- 2Block P50-P61Haemorrhagic and haematological disorders of fetus and newborn
- 3Category P55Haemolytic disease of fetus and newborn
- 4Valid code P55.9Haemolytic disease of fetus and newborn, unspecified
Source and release
- Data release
- ICD-10-CA · FY 2026–2027
- Effective date
- Apr 1, 2026
- Publisher
- CIHI
This page is built from the ICD-10-CA catalog that Vero Codes reads when it suggests codes: Canadian Institute for Health Information’s FY 2026–2027 release, imported from the publisher’s file and checked against it. The description, notes and structured data come from the same record.
Frequently asked questions
What does ICD-10-CA code P55.9 mean?
P55.9 is the ICD-10-CA code for “Haemolytic disease of fetus and newborn, unspecified” in CIHI’s ICD-10-CA FY 2026–2027 release.
Where is P55.9 in ICD-10-CA?
P55.9 sits under P55 Haemolytic disease of fetus and newborn, within P50-P61 Haemorrhagic and haematological disorders of fetus and newborn, within Chapter 16: Certain conditions originating in the perinatal period (P00-P96).
What coding notes apply to P55.9?
ICD-10-CA lists Excludes, Includes notes for P55.9, including those from the headings it sits under. They are listed on this page with where each one comes from.
Which ICD-10-CA release does this page use?
It uses CIHI’s FY 2026–2027 release, in effect from Apr 1, 2026 to Mar 31, 2027. It is a reference: confirm the code against the current list and the payer’s rules before you submit it.