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ICD-10-CM 2027 diagnosis code

P78.84Gestational alloimmune liver disease

✓ Billable / specificPOA exempt

P78.84 is a valid, billable ICD-10-CM code for gestational alloimmune liver disease. It can be reported on claims for dates of service from October 1, 2026 – September 30, 2027.

Looking up by condition? See ICD-10 code for GALD.

Code last changed in FY2018 (effective October 1, 2017). Source: official FY2027 ICD-10-CM release from CDC/NCHS and CMS. Page updated September 29, 2026. About our data

About P78.84

P78.84 is the ICD-10-CM diagnosis code for gestational alloimmune liver disease. It belongs to category P78 (other perinatal digestive system disorders), block P76-P78 (digestive system disorders of newborn) and chapter 16 (certain conditions originating in the perinatal period). It is billable, so it can be reported on its own for dates of service from October 1, 2026 through September 30, 2027.

Within P78.8 (other specified perinatal digestive system disorders), P78.84 is specifically for gestational alloimmune liver disease. Related codes cover congenital cirrhosis (of liver) (P78.81), peptic ulcer of newborn (P78.82), newborn esophageal reflux (P78.83) and other specified perinatal digestive system disorders (P78.89).

Don't report P78.84 together with the conditions in its Excludes1 note: hemochromatosis (E83.11-).

It is not a CC or MCC, so as a secondary diagnosis it doesn't change the MS-DRG severity level.

In MS-DRG v44.0, it is part of the grouping logic for DRG 794 (Neonate with Other Significant Problems, relative weight 1.4935), in MDC 15 (Newborns and Other Neonates with Conditions Originating in the Perinatal Period), as a principal or secondary diagnosis. The DRG a claim lands in depends on the principal diagnosis, procedures and any CC/MCC secondary diagnoses.

It is exempt from present-on-admission (POA) reporting, so no POA indicator is required.

It was added in FY2018, effective October 1, 2017.

Before ICD-10, this condition was coded in ICD-9-CM as 775.89 (other neonatal endocrine and metabolic disturbances).

Coding notes

Applicable toConditions and synonyms classified to this code
  • GALD
  • Neonatal hemochromatosis
Excludes1Not coded here — never report together with this code

Notes that apply from higher levels

Instructions written at a parent level also apply to P78.84.

› From P78 Other perinatal digestive system disorders
Excludes1

Broader instructions also apply from Chapter 16: Certain conditions originating in the perinatal period.

Alphabetic index entries

3 entries

Terms in the official ICD-10-CM index that lead to P78.84.

Codes whose notes reference P78.84

MS-DRG v44.0 grouping

All DRGs →

Inpatient MS-DRGs this diagnosis can group to, as the principal or a secondary diagnosis, depending on the rest of the claim.

MDC 15 · Newborns and Other Neonates with Conditions Originating in the Perinatal Period

ICD-9-CM equivalent

Converter →
  • 775.89Other neonatal endocrine and metabolic disturbancesapproximate

From the CMS 2018 General Equivalence Mappings (GEMs), the final GEMs release.

Code history

  1. 2016
  2. 2017
  3. 2018
  4. 2019
  5. 2020
  6. 2021
  7. 2022
  8. 2023
  9. 2024
  10. 2025
  11. 2026
  12. 2027
  • FY2018 (effective 10/1/2017): Added
  • No changes since FY2018.

Common questions about P78.84

Is P78.84 billable?

Yes. P78.84 is a billable/specific ICD-10-CM code valid for FY2027 (October 1, 2026 – September 30, 2027).

Can P78.84 be used as a principal diagnosis?

Yes. The Medicare Code Editor doesn't restrict P78.84 as a principal diagnosis.

Is P78.84 a CC or MCC?

No. P78.84 is neither a CC nor an MCC under MS-DRG v44.0.

What DRG does P78.84 group to?

P78.84 is used in the MS-DRG v44.0 logic for MS-DRG 794 (Neonate with Other Significant Problems). Which one applies depends on whether it is the principal diagnosis and on the rest of the claim.

What is the ICD-9 code for P78.84?

The CMS General Equivalence Mappings map P78.84 to ICD-9-CM 775.89.