P56.99 — Hydrops fetalis due to other hemolytic disease
Is P56.99 billable?
Yes — P56.99 is billable for FY2027. P56.99 is a valid, billable ICD-10-CM code at the highest level of specificity in its branch. P56.99 may be submitted for encounters from October 1, 2026 through September 30, 2027.
P56.99 at a glance
| Code | P56.99 |
|---|---|
| Description | Hydrops fetalis due to other hemolytic disease |
| Billable | Yes |
| Code set | ICD-10-CM FY2027 |
| Valid for encounters | October 1, 2026 – September 30, 2027 |
Which MS-DRGs does P56.99 group to?
P56.99 sits in MDC 15 and helps define the logic of 1 MS-DRG (version 44, FY2027). Which one a stay actually groups to also depends on procedures and secondary diagnoses.
- 791Prematurity with Major Problemsmedical
As a secondary diagnosis, P56.99 is a major complication or comorbidity (MCC), which can move a stay into a higher-paying DRG.
How is P56.99 listed in the Alphabetic Index?
These are the routes through the Alphabetic Index that lead to P56.99. They show the wording a clinician may have documented, which often differs from the Tabular description.
- Hydrops › fetalis › due to › hemolytic disease › specified NEC
- Hydrops › newborn › due to › hemolytic disease › specified NEC
Excludes1 — never code together — inherited from P50-P61
The conditions below can never be reported together with P56.99 on the same claim. An Excludes1 note means the two conditions cannot occur in the same patient, so reporting both is a coding error.
Excludes1 — never code together — inherited from P56
The conditions below can never be reported together with P56.99 on the same claim. An Excludes1 note means the two conditions cannot occur in the same patient, so reporting both is a coding error.
- hydrops fetalis NOS (P83.2)
Excludes2 — not included here — inherited from Chapter 16
The conditions below are not part of P56.99, but a patient may have both at the same time. When documentation supports it, P56.99 and the excluded code may both be reported.
How long has P56.99 existed?
P56.99 has been in ICD-10-CM since at least FY2016, the earliest fiscal year on record here.
Derived from the official order files for FY2016–FY2026. FY2017 and FY2020 publish no order file, so those years are not covered.