ICD-10-CM 2027 diagnosis code

P56.9Hydrops fetalis due to other and unspecified hemolytic disease

Not billable — use a more specific code

P56.9 is a header code, so it can't be reported by itself. Choose one of the 2 more specific codes beneath it.Short description: Hydrops fetalis due to other and unsp hemolytic disease

Code unchanged since ICD-10-CM took effect on October 1, 2015. Source: official FY2027 ICD-10-CM release from CDC/NCHS and CMS. Page updated September 29, 2026. About our data

About P56.9

P56.9 is the ICD-10-CM diagnosis code for hydrops fetalis due to other and unspecified hemolytic disease. It belongs to category P56 (hydrops fetalis due to hemolytic disease), block P50-P61 (hemorrhagic and hematological disorders of newborn) and chapter 16 (certain conditions originating in the perinatal period). It is a header code, so it can't be reported by itself; one of its 2 subcodes must be used instead.

Within P56, choose P56.9 (other and unspecified hemolytic disease) only when documentation doesn't support a more specific option: isoimmunization (P56.0).

To report this condition, pick the subcode that matches the documentation: P56.90 (disease) and P56.99 (disease).

It has been part of ICD-10-CM since the code set took effect on October 1, 2015 and hasn't changed since.

Specific codes under P56.9

Notes that apply from higher levels

Instructions written at a parent level also apply to P56.9.

› From P56 Hydrops fetalis due to hemolytic disease

Excludes1

hydrops fetalis NOS (P83.2)

Broader instructions also apply from P50-P61 Hemorrhagic and hematological disorders of newborn and Chapter 16: Certain conditions originating in the perinatal period.

Code history

2016
2017
2018
2019
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2021
2022
2023
2024
2025
2026
2027

FY2016 (effective 10/1/2015): Added (first year of ICD-10-CM)
No changes since FY2016.

Common questions about P56.9

Is P56.9 billable?: No. P56.9 is a header code. Report one of its more specific subcodes instead.