ICD-10-CM 2027 diagnosis code
P35.8Other congenital viral diseases
P35.8 is a valid, billable ICD-10-CM code for other congenital viral diseases. It can be reported on claims for dates of service from October 1, 2026 – September 30, 2027.
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 P35.8
P35.8 is the ICD-10-CM diagnosis code for other congenital viral diseases. It belongs to category P35 (congenital viral diseases), block P35-P39 (infections specific to the perinatal period) 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 P35, choose P35.8 (Other congenital viral diseases) only when documentation doesn't support a more specific option: congenital rubella syndrome (P35.0), congenital cytomegalovirus infection (P35.1), congenital herpesviral [herpes simplex] infection (P35.2), congenital viral hepatitis (P35.3), congenital Zika virus disease (P35.4) and congenital viral disease, unspecified (P35.9).
As a secondary diagnosis it is an MCC (major complication or comorbidity), which can move an inpatient stay into the highest-paying "with MCC" MS-DRG of its family, unless the principal diagnosis excludes it.
In MS-DRG v44.0, it is part of the grouping logic for DRG 791 (Prematurity with Major Problems, relative weight 4.1075) and DRG 793 (Full Term Neonate with Major Problems, relative weight 4.2195), 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 has been part of ICD-10-CM since the code set took effect on October 1, 2015 and hasn't changed since.
Before ICD-10, this condition was coded in ICD-9-CM as 771.2 (other congenital infections specific to the perinatal period).
Coding notes
- Congenital varicella [chickenpox]
Notes that apply from higher levels
Instructions written at a parent level also apply to P35.8.
› From P35 Congenital viral diseases
- infections acquired in utero or during birth
Broader instructions also apply from P35-P39 Infections specific to the perinatal period and Chapter 16: Certain conditions originating in the perinatal period.
Alphabetic index entries
8 entriesTerms in the official ICD-10-CM index that lead to P35.8.
- Disease, diseased › infectious, infective › congenital › viral › specified type NEC
- Disease, diseased › viral, virus › congenital › specified NEC
- Infection, infected, infective (opportunistic) › congenital › poliomyelitis
- Infection, infected, infective (opportunistic) › congenital › vaccinia
- Infection, infected, infective (opportunistic) › congenital › virus › specified type NEC
- Poliomyelitis (acute) (anterior) (epidemic) › congenital
- Vaccinia (generalized) (localized) › congenital
- Varicella › congenital
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
MDC 15 · Newborns and Other Neonates with Conditions Originating in the Perinatal Period
ICD-9-CM equivalent
Converter →- 771.2Other congenital infections specific to the perinatal periodapproximate
From the CMS 2018 General Equivalence Mappings (GEMs), the final GEMs release.
Code history
- 2016
- 2017
- 2018
- 2019
- 2020
- 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 P35.8
Is P35.8 billable?
- Yes. P35.8 is a billable/specific ICD-10-CM code valid for FY2027 (October 1, 2026 – September 30, 2027).
Can P35.8 be used as a principal diagnosis?
- Yes. The Medicare Code Editor doesn't restrict P35.8 as a principal diagnosis.
Is P35.8 a CC or MCC?
- P35.8 is an MCC (major complication or comorbidity) under MS-DRG v44.0, unless excluded by the principal diagnosis.
What DRG does P35.8 group to?
- P35.8 is used in the MS-DRG v44.0 logic for MS-DRG 791 (Prematurity with Major Problems) and MS-DRG 793 (Full Term Neonate with Major 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 P35.8?
- The CMS General Equivalence Mappings map P35.8 to ICD-9-CM 771.2.