P35.8 Other congenital viral diseases

The ICD-10-CM code for Other congenital viral diseases is P35.8 (FY2026). It is a billable, claim-ready diagnosis code.

Classification

Chapter

16: Certain conditions originating in the perinatal period (P00-P96)

Section

P35-P39: Infections specific to the perinatal period (P35-P39)

Category P35

8 codes (7 billable)

FY2026 Status

Stable since FY2024

Also Known As

ICD-10-CM Alphabetic Index entries that lead to P35.8:

• Poliomyelitis (acute) (anterior) (epidemic) › congenital
• Varicella › congenital
• Vaccinia (generalized) (localized) › congenital
• Infection, infected, infective (opportunistic) › congenital › poliomyelitis
• Infection, infected, infective (opportunistic) › congenital › vaccinia
• Infection, infected, infective (opportunistic) › congenital › virus › specified type NEC
• Disease, diseased › viral, virus › congenital › specified NEC
• Disease, diseased › infectious, infective › congenital › viral › specified type NEC

Inclusion Terms

• Congenital varicella [chickenpox]

U.S. Hospital Utilization

• An estimated 550 U.S. inpatient stays in 2023 included P35.8 among the documented diagnoses.
• 160 stays listed it as the principal diagnosis.

Source: National Inpatient Sample (NIS), Healthcare Cost and Utilization Project (HCUP), Agency for Healthcare Research and Quality, 2016–2023. National survey-weighted estimates.

Official Coding Guidelines

Newborn COVID-19 coding incl in utero/birth process and Z38 principal

h. COVID-19 Infection in Newborn For a newborn that tests positive for COVID-19, assign code U07.1, COVID-19, and the appropriate codes for associated manifestation(s) in neonates/newborns in the absence of documentation indicating a specific type of transmission. For a newborn that tests positive for COVID-19 and the provider documents the condition was contracted in utero or during the birth process, assign codes P35.8, Other congenital viral diseases, and U07.1, COVID-19. When coding the birth episode in a newborn record, the appropriate code from category Z38, Liveborn infants according to place of birth and type of delivery, should be assigned as the principal diagnosis.

Use of Z05 codes (newborn suspected condition ruled out)

1) Use of Z05 codes Assign a code from category Z05, Observation and evaluation of newborn for suspected diseases and conditions ruled out, to identify those instances when a healthy newborn is evaluated for a suspected condition/disease that is determined after study not to be present. Do not use a code from category Z05 when the patient is documented to have signs or symptoms of a suspected problem; in such cases code the sign or symptom.

Source: CMS — ICD-10-CM Official Guidelines for Coding and Reporting, FY2026

References

• CMS — ICD-10-CM Official Code Set and Guidelines, FY2026
• CDC/NCHS — ICD-10-CM Files and Browser Tool
• AHRQ — HCUP National Inpatient Sample, Frequencies by Diagnosis Code (2016–2023)