ICD-10-CM 2027
ICD-10 code for hemolytic disease newborn rh
From the official ICD-10-CM alphabetic index entry “Rh (factor) › hemolytic disease (newborn)”. Page updated September 29, 2026.
About coding hemolytic disease newborn rh
The ICD-10-CM code for hemolytic disease newborn rh is P55.0 (Rh isoimmunization of newborn).
Within P55 (hemolytic disease of newborn), P55.0 is specifically for Rh isoimmunization of newborn. Related codes cover ABO isoimmunization of newborn (P55.1), other hemolytic diseases of newborn (P55.8) and unspecified (P55.9).
It is not a CC or MCC, so as a secondary diagnosis it doesn't change the MS-DRG severity level.
In MS-DRG v44.0, it is part of the grouping logic for DRG 794 (Neonate with Other Significant Problems, relative weight 1.4935), in MDC 15 (Newborns and Other Neonates with Conditions Originating in the Perinatal Period), as a principal or secondary diagnosis. The DRG a claim lands in depends on the principal diagnosis, procedures and any CC/MCC secondary diagnoses.
Common questions about hemolytic disease newborn rh ICD-10 codes
What is the ICD-10 code for hemolytic disease newborn rh?
- P55.0 — Rh isoimmunization of newborn.
Is P55.0 billable?
- Yes. P55.0 is a billable/specific ICD-10-CM code valid for FY2027 (October 1, 2026 – September 30, 2027).
Can P55.0 be used as a principal diagnosis?
- Yes. The Medicare Code Editor doesn't restrict P55.0 as a principal diagnosis.
Is P55.0 a CC or MCC?
- No. P55.0 is neither a CC nor an MCC under MS-DRG v44.0.