2026 ICD-10-CM Diagnosis Code P35.1Congenital cytomegalovirus infection

ICD-10-CM Codes›P00–P96›P35-P39›P35

ICD-10-CM P35.1
CMSSource: CMS FY 2026 ICD-10-CM dataset · Effective Oct 1, 2025 – Sep 30, 2026

P35.1 is a billable ICD-10-CM diagnosis code for congenital cytomegalovirus infection. It is valid on HIPAA claims for fiscal year 2026 (October 1, 2025 through September 30, 2026). Coders also document this condition as chronic congenital cytomegalic inclusion disease. In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Perinatal infections and Viral infection.

Code Identity

ICD-10-CM Code
P35.1
Billable Status
Yes — Valid for Submission
Code Describes
Congenital cytomegalovirus infection
Short Description
Congenital cytomegalovirus infection
Same as the full description in the CMS dataset.
Parent Code
P35
Congenital viral diseases

Code Classification

ChapterP00–P96Certain conditions originating in the perinatal period
SectionP35-P39Infections specific to the perinatal period
CategoryP35Congenital viral diseases
This CodeP35.1Congenital cytomegalovirus infection

Approximate SynonymsGuidance

Alternate terms and clinical phrases that map to this code.

  • Chronic congenital cytomegalic inclusion disease
  • Congenital cytomegalovirus infection
  • Congenital infection caused by Herpes virus

Index to Diseases and InjuriesGuidance

Alphabetical index entries that point to this code.

External Cause of Injuries IndexGuidance

References for this code in the External Cause of Injuries Index.

    • Cytomegalic inclusion disease
      • congenital
    • Disease, diseased
      • cytomegalic inclusion (generalized)
        • congenital
    • Infection, infected, infective(opportunistic)
      • congenital
        • cytomegalovirus
    • Infection, infected, infective(opportunistic)
      • cytomegalovirus, cytomegaloviral
        • congenital

Clinical ClassificationClinical

AHRQ’s CCSR groups this code into broader clinical categories.

CCSR PNL009
Perinatal infections
Default principal diagnosis: inpatient Yes · outpatient Yes
CCSR INF008
Viral infection
Default principal diagnosis: inpatient No · outpatient No

Patient EducationClinical

Cytomegalovirus Infections

Cytomegalovirus (CMV) is a virus found around the world. It is related to the viruses that cause chickenpox and infectious mononucleosis (mono). Between 50% and 80% of adults in the United States have had a CMV infection by age 40. Once CMV is in a person's body, it stays there for life.

Read the full article at MedlinePlus

Courtesy of MedlinePlus, a service of the U.S. National Library of Medicine.

Convert P35.1 to ICD-9-CMHistory

The closest ICD-9-CM equivalents under the General Equivalence Mappings.

ICD-9-CM
771.1 Cong cytomegalovirus inf
Exact Match The mapping is direct, with no qualifiers.

Code HistoryHistory

FY 2016AddedAdded to the ICD-10-CM code setEffective October 1, 2015, the first year of ICD-10-CM.
FY 2017–2025No changes
FY 2026CurrentCurrent code set, no changesEffective October 1, 2025 through September 30, 2026.

Questions About P35.1Overview

Is P35.1 (Congenital viral diseases) a billable code?

Yes. This is a billable ICD-10-CM code, specific enough to report congenital cytomegalovirus infection on HIPAA-covered claims from October 1, 2025 through September 30, 2026.

What is the ICD-9 equivalent of P35.1?

Under the General Equivalence Mappings, congenital cytomegalovirus infection converts to ICD-9-CM 771.1 (cong cytomegalovirus inf). The mapping is a direct match.

Footnotes

[1] Chronic - a chronic condition code indicates a condition lasting 12 months or longer and its effect on the patient based on one or both of the following criteria:

  • The condition results in the need for ongoing intervention with medical products,treatment, services, and special equipment
  • The condition places limitations on self-care, independent living, and social interactions.