P55.9
P55.9 — Hemolytic disease of newborn, unspecified
Billable / specific codeICD-10-CM
P55.9 is a billable, specific ICD-10-CM code for hemolytic disease of newborn, unspecified. It is valid for submission on a claim.
Risk adjustment
P55.9 risk-adjusts. Under the CMS-HCC V28 model it maps to this category:
- HCC 109 Acquired Hemolytic, Aplastic, and Sideroblastic Anemias1.144 RAF
Coefficient shown for the Community Non-dual Aged segment. A higher HCC in the same hierarchy will suppress this one, so capturing it does not always add score.
How P55.9 is indexed
Coders do not find codes by browsing the tabular list — they look them up in the alphabetic index, under the word the physician wrote. These are the index entries that lead here, so you can see which chart wordings map to P55.9.
- Erythroblastosis(fetalis) (newborn)
- Disease, diseased›hemolytic(newborn)
- Isoimmunization NEC›newborn
- Anemia›congenital›due to isoimmunization NOS
- Anemia›erythroblastic›newborn
- Jaundice›newborn›due to or associated with›hemolytic disease
- Jaundice›newborn›due to or associated with›incompatibility, maternal/fetal NOS
- Jaundice›newborn›due to or associated with›isoimmunization NOS
Related codes at this level
Codes that share P55. If P55.9 is not quite right, the correct code is usually one of these.
Questions about P55.9
- Is P55.9 a billable ICD-10-CM code?
- Yes. P55.9 is a billable, specific ICD-10-CM code and is valid for submission on a claim.
- Where does P55.9 sit in the tabular list?
- Certain conditions originating in the perinatal period (P00-P96), in the block Hemorrhagic and hematological disorders of newborn (P50-P61).