Is P56.99 a billable ICD-10-CM code?

Yes. P56.99 is a billable, specific ICD-10-CM code and is valid for submission on a claim.

Where does P56.99 sit in the tabular list?

Certain conditions originating in the perinatal period (P00-P96), in the block Hemorrhagic and hematological disorders of newborn (P50-P61).

What cannot be coded together with P56.99?

P56.99 carries Excludes1 notes, which means the conditions they list can never be coded together with it on the same encounter. Some are written on the categories above P56.99 (P56) and apply to it just the same.

P56.99

P56.99 — Hydrops fetalis due to other hemolytic disease

Billable / specific codeICD-10-CM

P56.99 is a billable, specific ICD-10-CM code for hydrops fetalis due to other hemolytic disease. It is valid for submission on a claim.

Excludes1 inherited from the categories above P56.99

These are not written on P56.99, but they bind it: a note on a category applies to every code beneath it. Billing P56.99 with anything listed here is a denial.

Written on P56 — Hydrops fetalis due to hemolytic disease

hydrops fetalis NOS (P83.2)

Other codes that can never be billed with P56.99

These codes carry an Excludes1 note pointing at P56.99. The conflict binds both ways, but ICD-10-CM only writes it down on one side — so you would not find this by reading P56.99 alone.

P83Other conditions of integument specific to newborn

Risk adjustment

P56.99 risk-adjusts. Under the CMS-HCC V28 model it maps to this category:

HCC 109 Acquired Hemolytic, Aplastic, and Sideroblastic Anemias1.144 RAF

Coefficient shown for the Community Non-dual Aged segment. A higher HCC in the same hierarchy will suppress this one, so capturing it does not always add score.

How P56.99 is indexed

Coders do not find codes by browsing the tabular list — they look them up in the alphabetic index, under the word the physician wrote. These are the index entries that lead here, so you can see which chart wordings map to P56.99.

Hydrops›fetalis›due to›hemolytic disease›specified NEC
Hydrops›newborn›due to›hemolytic disease›specified NEC

Code history

P56.99 has not changed since FY2024 — no addition, revision or deletion across the three most recent ICD-10-CM releases.

Related codes at this level

Codes that share P56.9. If P56.99 is not quite right, the correct code is usually one of these.

P56.90Hydrops fetalis due to unspecified hemolytic disease

Questions about P56.99

Is P56.99 a billable ICD-10-CM code?: Yes. P56.99 is a billable, specific ICD-10-CM code and is valid for submission on a claim.
Where does P56.99 sit in the tabular list?: Certain conditions originating in the perinatal period (P00-P96), in the block Hemorrhagic and hematological disorders of newborn (P50-P61).
What cannot be coded together with P56.99?: P56.99 carries Excludes1 notes, which means the conditions they list can never be coded together with it on the same encounter. Some are written on the categories above P56.99 (P56) and apply to it just the same.