2027 ICD-10-CM Diagnosis Code O98Maternal infectious and parasitic diseases classifiable elsewhere but complicating pregnancy, childbirth and the puerperium

ICD-10-CM Codes›O00-O9A›O94-O9A›O98

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

O98 is a non-billable ICD-10-CM category code for maternal infectious and parasitic diseases classifiable elsewhere but complicating pregnancy, childbirth and the puerperium, so it cannot be submitted on claims. Use a more specific code from this category instead, such as O98.011, O98.012, O98.013, and O98.019.

Code Identity

ICD-10-CM Code
O98
Billable Status
No — Non-Billable Category
Code Describes
Maternal infectious and parasitic diseases classifiable elsewhere but complicating pregnancy, childbirth and the puerperium
Short Description
Matern infec/parastc dis classd elsw but compl preg/chldbrth
Chapter
O94-O9A
Other obstetric conditions, not elsewhere classified

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 CodeO98Maternal infectious and parasitic diseases classifiable elsewhere but complicating pregnancy, childbirth and the puerperium

Specific Coding for Matern infec/parastc dis classd elsw but compl preg/chldbrthOverview

Non-specific codes like O98 require more characters. Use one of these billable codes instead:

  • O98.0 for Tuberculosis complicating pregnancy, childbirth and the puerperium

  • O98.01 for Tuberculosis complicating pregnancy

  • Use O98.02 for Tuberculosis complicating childbirth

  • Use O98.03 for Tuberculosis complicating the puerperium

  • O98.1 for Syphilis complicating pregnancy, childbirth and the puerperium

  • O98.11 for Syphilis complicating pregnancy

  • Use O98.12 for Syphilis complicating childbirth

  • Use O98.13 for Syphilis complicating the puerperium

  • O98.2 for Gonorrhea complicating pregnancy, childbirth and the puerperium

  • O98.21 for Gonorrhea complicating pregnancy

  • Use O98.22 for Gonorrhea complicating childbirth

  • Use O98.23 for Gonorrhea complicating the puerperium

  • O98.3 for Other infections with a predominantly sexual mode of transmission complicating pregnancy, childbirth and the puerperium

  • O98.31 for Other infections with a predominantly sexual mode of transmission complicating pregnancy

  • Use O98.32 for Other infections with a predominantly sexual mode of transmission complicating childbirth

  • Use O98.33 for Other infections with a predominantly sexual mode of transmission complicating the puerperium

  • O98.4 for Viral hepatitis complicating pregnancy, childbirth and the puerperium

  • O98.41 for Viral hepatitis complicating pregnancy

  • Use O98.42 for Viral hepatitis complicating childbirth

  • Use O98.43 for Viral hepatitis complicating the puerperium

  • O98.5 for Other viral diseases complicating pregnancy, childbirth and the puerperium

  • O98.51 for Other viral diseases complicating pregnancy

  • Use O98.52 for Other viral diseases complicating childbirth

  • Use O98.53 for Other viral diseases complicating the puerperium

  • O98.6 for Protozoal diseases complicating pregnancy, childbirth and the puerperium

  • O98.61 for Protozoal diseases complicating pregnancy

  • Use O98.62 for Protozoal diseases complicating childbirth

  • Use O98.63 for Protozoal diseases complicating the puerperium

  • O98.7 for Human immunodeficiency virus [HIV] disease complicating pregnancy, childbirth and the puerperium

  • O98.71 for Human immunodeficiency virus [HIV] disease complicating pregnancy

  • Use O98.72 for Human immunodeficiency virus [HIV] disease complicating childbirth

  • Use O98.73 for Human immunodeficiency virus [HIV] disease complicating the puerperium

  • O98.8 for Other maternal infectious and parasitic diseases complicating pregnancy, childbirth and the puerperium

  • O98.81 for Other maternal infectious and parasitic diseases complicating pregnancy

  • Use O98.82 for Other maternal infectious and parasitic diseases complicating childbirth

  • Use O98.83 for Other maternal infectious and parasitic diseases complicating the puerperium

  • O98.9 for Unspecified maternal infectious and parasitic disease complicating pregnancy, childbirth and the puerperium

  • O98.91 for Unspecified maternal infectious and parasitic disease complicating pregnancy

  • Use O98.92 for Unspecified maternal infectious and parasitic disease complicating childbirth

  • Use O98.93 for Unspecified maternal infectious and parasitic disease complicating the puerperium

Instructional NotesGuidance

Instructions from the official ICD-10-CM Tabular List that apply to O98: its own notes plus those printed at 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.

  • 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 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.

On O98 itself
  • 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.

On O98 itself
  • 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, its category, or a range that includes it.

Excludes2 1

These codes carry an Excludes2 note naming O98: 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.-)

Patient EducationClinical

Childbirth Problems

Childbirth is the process of giving birth to a baby. It includes labor and delivery. Usually everything goes well, but problems can happen. They may cause a risk to the mother, baby, or both. Some of the more common childbirth problems include:

Read the full article at MedlinePlus

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

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 O98Overview

Is O98 a billable code?

No. This is a category header that groups the codes for maternal infectious and parasitic diseases classifiable elsewhere but complicating pregnancy, childbirth and the puerperium, and headers cannot be submitted on claims. Claims for maternal infectious and parasitic diseases classifiable elsewhere but complicating pregnancy, childbirth and the puerperium need a more specific code from this category, such as O98.011, O98.012, and O98.013.

Does O98 need an additional code?

When the condition applies, yes. The Use Additional Code note reads: code (Chapter 1), to identify specific infectious or parasitic disease. The additional code is reported after O98.