All ICD10 Codes
O98Not billable, use a more specific code below

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

In Other obstetric conditions, not elsewhere classified (O94-O9A), chapter 15: Pregnancy, Childbirth and the Puerperium

60 billable codes under O98: 50 are a CC; none map to an HCC.A CC or MCC (major CC) is a secondary diagnosis that raises the MS-DRG payment.

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Instructional notes

Includes: conditions that are coded here

  • the listed conditions when complicating the pregnant state, when aggravated by the pregnancy, or as a reason for obstetric care

Excludes2: not included here, code separately if applicable

  • 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)

Use additional code: add a second code for this, listed after this one

  • code (Chapter 1), to identify specific infectious or parasitic disease

Official coding guidelines

From the ICD-10-CM Official Guidelines for Coding and Reporting, FY 2027 (CMS and NCHS). Links open the PDF at the right page.

Coding of obstetric cases with O00-O9A codes: sequencing priority, trimester and fetus characters, principal diagnosis selection, delivery outcome, and pregnancy-related complications.

Read Section I.C.15 (page 63), 11 more topics

All codes under O98

O98 can't be used on a claim. Pick a billable code below; grey headings group them.

O98 MS-DRGs

As the principal diagnosis, the billable codes under O98 group to these 8 MS-DRGs (v44.0). Which one applies depends on procedures performed, secondary diagnoses (CC/MCC), and the patient's age and discharge status.

Other codes that refer to O98

Notes on these codes point to O98.

  • CH1 Excludes2: infectious and parasitic diseases complicating pregnancy, childbirth and the puerperium (O98.-)
  • O20-O29 Excludes2: maternal diseases classifiable elsewhere but complicating pregnancy, labor and delivery, and the puerperium (O98-O99)

About the condition

Plain-language background from MedlinePlus (National Library of Medicine), not coding guidance.

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 more about childbirth problems on MedlinePlus

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.

Read more about infections and pregnancy on MedlinePlus

Code history

Valid since FY2016, when ICD-10-CM took effect on October 1, 2015. No changes since.