ICD-10-CM > P00-P96 > P50-P61 > P56 P56 Hydrops fetalis due to hemolytic disease Non-Billable/Non-Specific Type 1 Excludes hydrops fetalis NOS (P83.2) Codes P56.0Hydrops fetalis due to isoimmunizationP56.9Hydrops fetalis due to other and unspecified hemolytic diseaseP56.90Hydrops fetalis due to unspecified hemolytic diseaseP56.99Hydrops fetalis due to other hemolytic disease