P56.0
Hydrops fetalis due to isoimmunization
Risk-adjusting (HCC)Billable code
HCC risk adjustment mapping
CMS-HCC V28
HCC109
Acquired Hemolytic, Aplastic, and Sideroblastic Anemias
Coding notes
Excludes 1 never coded together · Excludes 2 may co-exist
Inherited from P56Hydrops fetalis due to hemolytic disease
Excludes 1
hydrops fetalis NOS (P83.2)
Inherited from P50-P61Hemorrhagic and hematological disorders of newborn
Inherited from chapter 16Certain conditions originating in the perinatal period
Includes
conditions that have their origin in the fetal or perinatal period (before birth through the first 28 days after birth) even if morbidity occurs later
Excludes 2
congenital malformations, deformations and chromosomal abnormalities (Q00-Q99) endocrine, nutritional and metabolic diseases (E00-E88) injury, poisoning and certain other consequences of external causes (S00-T88) neoplasms (C00-D49) tetanus neonatorum (A33)
Note
Codes from this chapter are for use on newborn records only, never on maternal records
Official Guidelines for P56.0
FY 2026 ›I.C.16Chapter-specific guidanceChapter 16: Certain Conditions Originating in the Perinatal Period
Subsections
- I.C.16.aGeneral Perinatal Rules
- I.C.16.bObservation and Evaluation of Newborns for Suspected
- I.C.16.cCoding Additional Perinatal Diagnoses
- I.C.16.dPrematurity and Fetal Growth Retardation
- I.C.16.eLow birth weight and immaturity status
- I.C.16.fBacterial Sepsis of Newborn
- I.C.16.gStillbirth
- I.C.16.hCOVID-19 Infection in Newborn
Find P56.0 in the alphabetic index
8 index paths lead to this code
- Dropsy, dropsical › newborn due to isoimmunization
- Hydrops › fetalis › due to › ABO isoimmunization
- Hydrops › fetalis › due to › isoimmunization
- Hydrops › fetalis › due to › Rh incompatibility
- Hydrops › newborn › due to › ABO isoimmunization
- Hydrops › newborn › due to › isoimmunization
- Hydrops › newborn › due to › Rh incompatibility
- Isoimmunization NEC › newborn › with › hydrops fetalis