Hydrops fetalis due to hemolytic disease (P56) ICD-10-CM
The P56 code range covers hydrops fetalis due to hemolytic disease with 5 ICD-10-CM diagnosis codes. 3 of them are billable and valid for claim submission in fiscal year 2026, and the category headers group them but cannot themselves be billed.
Type 1 Excludes
A type 1 excludes note is a pure excludes note. It means "NOT CODED HERE!" An Excludes1 note indicates that the code excluded should never be used at the same time as the code above the Excludes1 note. An Excludes1 is used when two conditions cannot occur together, such as a congenital form versus an acquired form of the same condition.
- hydrops fetalis NOS P83.2
Codes in the P56 Range 5 codes · 3 billable
Clinical Terms in This Code Range
Definitions from the National Library of Medicine for conditions coded in the P56 range.
Hydrops Fetalis
Abnormal accumulation of serous fluid in two or more fetal compartments, such as SKIN; PLEURA; PERICARDIUM; PLACENTA; PERITONEUM; AMNIOTIC FLUID. General fetal EDEMA may be of non-immunologic origin, or of immunologic origin as in the case of ERYTHROBLASTOSIS FETALIS.
About the P56 Code Range
ICD-10 code P56 covers cases of hydrops fetalis due to hemolytic disease, a serious condition where excess fluid builds up in a fetus because of red blood cell destruction. This section is used to specify the type and cause of hemolytic disease leading to hydrops fetalis.
The main ICD-10 codes in this category help healthcare providers and coders identify the underlying cause precisely. For example, P56.0 is the code assigned when hydrops fetalis results from isoimmunization, a condition where the mother's immune system attacks fetal red blood cells, sometimes referred to simply as "hydrops fetalis due to isoimmunization." Other codes like P56.9, P56.90, and P56.99 distinguish between unspecified or other types of hemolytic diseases causing the fluid buildup. Correctly using these codes ensures clear documentation of cases involving hemolytic jaundice and perinatal complications. Thus, the ICD-10 code for hydrops fetalis related to hemolytic disease is essential for accurately capturing the cause and guiding proper medical management and reporting.
Questions About This Page
How many billable codes are in the P56 range?
Of the 5 codes in this range, 3 are billable and valid for claim submission from October 1, 2025 through September 30, 2026. Category header codes group them but cannot be reported on claims.
What does the P56 range classify?
The range classifies hydrops fetalis due to hemolytic disease. Each code links to its own reference page with billing status, MS-DRG grouping, coding notes, and clinical information.
Related References
Source: CMS FY 2026 ICD-10-CM Tabular List and order file, effective October 1, 2025 through September 30, 2026.
