2026 ICD-10-CM Diagnosis Code O35.3XX2Maternal care for (suspected) damage to fetus from viral disease in mother, fetus 2

ICD-10-CM Codes›O00-O9A›O30-O48›O35

ICD-10-CM O35.3XX2
CMSSource: CMS FY 2026 ICD-10-CM dataset · Effective Oct 1, 2025 – Sep 30, 2026

O35.3XX2 is a billable ICD-10-CM diagnosis code for maternal care for (suspected) damage to fetus from viral disease in mother, fetus 2. The 7th character 2 identifies fetus 2 in a multiple gestation pregnancy. It is valid on HIPAA claims for fiscal year 2026 (October 1, 2025 through September 30, 2026) and groups to MS-DRG 817 through 819, 831 through 833. The code is restricted by the Medicare Code Editor to maternity cases (age 9 through 64). In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Maternal care related to fetal conditions.

Code Identity

ICD-10-CM Code
O35.3XX2
Billable Status
Yes — Valid for Submission
Code Describes
Maternal care for (suspected) damage to fetus from viral disease in mother, fetus 2
Short Description
Matern care for damag to fts from viral dis in mother, fts2
Parent Code
O35.3
Maternal care for (suspected) damage to fetus from viral disease in mother

Code Classification

ChapterO00-O9APregnancy, childbirth and the puerperium
SectionO30-O48Maternal care related to the fetus and amniotic cavity and possible delivery problems
CategoryO35Maternal care for known or suspected fetal abnormality and damage
This CodeO35.3XX2Maternal care for (suspected) damage to fetus from viral disease in mother, fetus 2

Code EditsBilling

Medicare Code Editor checks that affect claim validity for O35.3XX2.

Maternity diagnoses
The Medicare Code Editor detects inconsistencies in maternity cases by checking a patient's age and any diagnosis on the patient's record. The maternity code edits apply to patients age ange is 9–64 years inclusive (e.g., diabetes in pregnancy, antepartum pulmonary complication).

Clinical ClassificationClinical

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

CCSR PRG013
Maternal care related to fetal conditions
Default principal diagnosis: inpatient Yes · outpatient Yes

Patient EducationClinical

Infections and Pregnancy

During pregnancy, some common infections such as the common cold or a skin infection do not usually cause serious problems. Some infections, such as the flu, can be more severe when you're pregnant. But other infections can be harmful to you, your fetus, or both.

The full article covers:

  • How can infections affect your pregnancy?
  • What infections can be harmful during pregnancy?
  • What are the symptoms of an infection during pregnancy?
  • What are the treatments for infections during pregnancy?
  • Can infections during pregnancy be prevented?

Read the full article at MedlinePlus

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

Convert O35.3XX2 to ICD-9-CMHistory

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

ICD-9-CM
655.31 Fet damg d/t virus-deliv
Approximate The match is approximate rather than exact.
ICD-9-CM
655.33 Fet damg d/t virus-antep
Approximate The match is approximate rather than exact.

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 O35.3XX2Overview

Is O35.3XX2 a billable code?

Yes. This is a billable ICD-10-CM code, specific enough to report maternal care for (suspected) damage to fetus from viral disease in mother, fetus 2 on HIPAA-covered claims from October 1, 2025 through September 30, 2026.

What does the 7th character 2 in O35.3XX2 mean?

The final character 2 identifies the fetus in a multiple gestation pregnancy: this code reports maternal care for (suspected) damage to fetus from viral disease in mother for fetus 2.

What MS-DRG does O35.3XX2 group to?

When maternal care for (suspected) damage to fetus from viral disease in mother, fetus 2 is the principal diagnosis on an inpatient stay, it groups to MS-DRG 817, 818, 819, 831, 832, 833, with relative weights from 0.5229 to 1.6880 depending on complications. Higher weights mean higher Medicare reimbursement.

Who can O35.3XX2 be reported for?

The Medicare Code Editor checks maternal care for (suspected) damage to fetus from viral disease in mother, fetus 2 against patient demographics: this code is intended for maternity cases (age 9 through 64). Claims outside these limits are flagged as inconsistent.

What is the ICD-9 equivalent of O35.3XX2?

Under the General Equivalence Mappings, maternal care for (suspected) damage to fetus from viral disease in mother, fetus 2 converts to ICD-9-CM 655.31 (fet damg d/t virus-deliv) and 655.33 (fet damg d/t virus-antep). The mapping is approximate, so confirm the match fits the documentation.

Footnotes

[1] Not chronic - A diagnosis code that does not fit the criteria for chronic condition (duration, ongoing medical treatment, and limitations) is considered not chronic. Some codes designated as not chronic are acute conditions. Other diagnosis codes that indicate a possible chronic condition, but for which the duration of the illness is not specified in the code description (i.e., we do not know the condition has lasted 12 months or longer) also are considered not chronic.