2027 ICD-10-CM Diagnosis Code O98.519Other viral diseases complicating pregnancy, unspecified trimester

ICD-10-CM Codes›O00-O9A›O94-O9A›O98

ICD-10-CM O98.519
CMSSource: CMS FY 2027 ICD-10-CM dataset · Effective Oct 1, 2026 – Sep 30, 2027

O98.519 is a billable ICD-10-CM diagnosis code for other viral diseases complicating pregnancy, unspecified trimester. It is valid on HIPAA claims for fiscal year 2027 (October 1, 2026 through September 30, 2027) 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). Coders also document this condition as COVID-19. In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Other specified complications in pregnancy.

Code Identity

ICD-10-CM Code
O98.519
Billable Status
Yes — Valid for Submission
Code Describes
Other viral diseases complicating pregnancy, unspecified trimester
Short Description
Other viral diseases complicating pregnancy, unsp trimester
Parent Code
O98.51
Other viral diseases complicating pregnancy

Code Classification

ChapterO00-O9APregnancy, childbirth and the puerperium
SectionO94-O9AOther obstetric conditions, not elsewhere classified
CategoryO98Maternal infectious and parasitic diseases classifiable elsewhere but complicating pregnancy, childbirth and the puerperium
This CodeO98.519Other viral diseases complicating pregnancy, unspecified trimester

Code EditsBilling

Medicare Code Editor checks that affect claim validity for O98.519.

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).

Approximate SynonymsGuidance

Alternate terms and clinical phrases that map to this code.

  • COVID-19
  • Disease caused by severe acute respiratory syndrome coronavirus 2 during pregnancy
  • Herpes in pregnancy
  • Infectious disease of mother complicating pregnancy
  • Viral disease in mother complicating pregnancy, childbirth AND/OR puerperium
  • Viral disease of mother during pregnancy
  • Zika virus disease
  • Zika virus infection during pregnancy

Instructional NotesGuidance

Instructions from the official ICD-10-CM Tabular List that apply to O98.519: its own notes plus those printed at O98.5, O98, and Chapter 15. A note printed at a category, block or chapter applies to every code under it.

Includes

Further defines, or gives examples of, the content of the category.

From O98 Maternal infectious and parasitic diseases classifiable elsewhere but complicating pregnancy, childbirth and the puerperium applies to 60 codes
  • the listed conditions when complicating the pregnant state, when aggravated by the pregnancy, or as a reason for obstetric care

Excludes1

Not coded here: the excluded code is never reported together with this one, unless the two conditions are unrelated.

From O98.5 Other viral diseases complicating pregnancy, childbirth and the puerperium applies to 6 codes
  • human immunodeficiency virus [HIV] disease complicating pregnancy, childbirth and the puerperium (O98.7-)
From Chapter 15 (O00-O9A) Pregnancy, childbirth and the puerperium applies to 2,481 codes
  • supervision of normal pregnancy (Z34.-)

Excludes2

Not included here: the excluded condition is not part of this code, but a patient may have both, so both codes may be reported.

From O98 Maternal infectious and parasitic diseases classifiable elsewhere but complicating pregnancy, childbirth and the puerperium applies to 60 codes
  • herpes gestationis (O26.4-)
  • infectious carrier state (O99.82-, O99.83-)
  • obstetrical tetanus (A34)
  • puerperal infection (O86.-)
  • puerperal sepsis (O85)
  • when the reason for maternal care is that the disease is known or suspected to have affected the fetus (O35-O36)
From Chapter 15 (O00-O9A) Pregnancy, childbirth and the puerperium applies to 2,481 codes
  • mental and behavioral disorders associated with the puerperium (F53.-)
  • obstetrical tetanus (A34)
  • postpartum necrosis of pituitary gland (E23.0)
  • puerperal osteomalacia (M83.0)

Use Additional Code

Add a second code, after this one, to fully describe the condition.

From O98 Maternal infectious and parasitic diseases classifiable elsewhere but complicating pregnancy, childbirth and the puerperium applies to 60 codes
  • code (Chapter 1), to identify specific infectious or parasitic disease
From Chapter 15 (O00-O9A) Pregnancy, childbirth and the puerperium applies to 2,481 codes
  • code, if applicable, from category Z3A, Weeks of gestation, to identify the specific week of the pregnancy, if known.

Notes

General instructions on how these codes are used.

From Chapter 15 (O00-O9A) Pregnancy, childbirth and the puerperium applies to 2,481 codes
  • CODES FROM THIS CHAPTER ARE FOR USE ONLY ON MATERNAL RECORDS, NEVER ON NEWBORN RECORDS
  • Codes from this chapter are for use for conditions related to or aggravated by the pregnancy, childbirth, or by the puerperium (maternal causes or obstetric causes)
  • Trimesters are counted from the first day of the last menstrual period. They are defined as follows:
  • 1st trimester- less than 14 weeks 0 days
  • 2nd trimester- 14 weeks 0 days to less than 28 weeks 0 days
  • 3rd trimester- 28 weeks 0 days until delivery

Source: CMS ICD-10-CM Tabular List. How to read instructional notes.

Referenced in Other NotesGuidance

Instructional notes printed at other codes that name O98.519, its category, or a range that includes it.

Excludes2 1

These codes carry an Excludes2 note naming O98.519: its condition is not part of those codes, and both may be reported when the patient has both.

  • Chapter 1 (A00-B99) Certain infectious and parasitic diseases
    infectious and parasitic diseases complicating pregnancy, childbirth and the puerperium (O98.-) names O98.-, which includes this code

Clinical ClassificationClinical

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

CCSR PRG028
Other specified complications in pregnancy
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 O98.519 to ICD-9-CMHistory

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

ICD-9-CM
647.60 Oth virus in preg-unspec
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 2017–2026No changes
FY 2027CurrentCurrent code set, no changesEffective October 1, 2026 through September 30, 2027.

Questions About O98.519Overview

What is the ICD-10 code for other viral diseases complicating pregnancy, unspecified trimester?

The ICD-10-CM code for other viral diseases complicating pregnancy, unspecified trimester is O98.519 (sometimes written as O98519). It is billable on HIPAA-covered claims from October 1, 2026 through September 30, 2027.

Is O98.519 (Other viral diseases complicating pregnancy) a billable code?

Yes. This is a billable ICD-10-CM code, specific enough to report other viral diseases complicating pregnancy, unspecified trimester on HIPAA-covered claims from October 1, 2026 through September 30, 2027.

What MS-DRG does O98.519 group to?

When other viral diseases complicating pregnancy, unspecified trimester is the principal diagnosis on an inpatient stay, it groups to MS-DRG 833, 832, 831, 819, 818, 817, with relative weights from 0.5000 to 1.7586 depending on complications. Higher weights mean higher Medicare reimbursement.

Who can O98.519 be reported for?

The Medicare Code Editor checks other viral diseases complicating pregnancy, unspecified trimester against patient demographics: this code is intended for maternity cases (age 9 through 64). Claims outside these limits are flagged as inconsistent.

Can O98.519 be reported with a code from O98.7?

Not as a rule. The Excludes1 note at O98.5, which applies to O98.519, lists "human immunodeficiency virus [HIV] disease complicating pregnancy, childbirth and the puerperium (O98.7-)". An Excludes1 note means the excluded code is never reported together with this one; the only exception is when the two conditions are unrelated to each other (Official Guidelines, Section I.A.12.a).