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O98.31

⚠ Non-billable (Header)

Other infections with a predominantly sexual mode of transmission complicating pregnancy

Pregnancy, childbirth and the puerperium (O00-O9A)

⚠️ This is a category header code — not billable. Use a more specific child code below.

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⚠️ Excludes2

inherited

Rules inherited from parent codes.

O98
  • • 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)

📋 Code Instructions

inherited
O98
  • • code (Chapter 1), to identify specific infectious or parasitic disease

Child Codes (4)

O98.311Other infections with a predominantly sexual mode of transmission complicating pregnancy, first trimesterO98.312Other infections with a predominantly sexual mode of transmission complicating pregnancy, second trimesterO98.313Other infections with a predominantly sexual mode of transmission complicating pregnancy, third trimesterO98.319Other infections with a predominantly sexual mode of transmission complicating pregnancy, unspecified trimester

Clinical Description

ICD-10-CM code O98.31 represents other infections with a predominantly sexual mode of transmission complicating pregnancy. This code falls under the Pregnancy, childbirth and the puerperium (O00-O9A) classification. It is a non-billable category header code. A more specific child code from the list below must be used for billing and reimbursement purposes.

This is a 6-character code at the 5th level of specificity. There are 4 more specific child codes under O98.31.

Frequently Asked Questions

What is ICD-10 code O98.31?

ICD-10-CM code O98.31 is "Other infections with a predominantly sexual mode of transmission complicating pregnancy". It belongs to the category: Pregnancy, childbirth and the puerperium (O00-O9A).

Is O98.31 a billable ICD-10 code?

No, O98.31 is a non-billable header code. A more specific child code must be used for billing.

Can O98.31 be coded with other codes?

O98.31 has 6 Excludes2 note(s). These conditions can be coded together if both are documented in the patient record.

Related Codes in O98.3

Other codes in the same category that may be relevant for differential coding:

O98.32Other infections with a predominantly sexual mode of transmission complicating childbirthO98.33Other infections with a predominantly sexual mode of transmission complicating the puerperium

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Code Information

CodeO98.31
BillableNo — Header code
ParentO98.3
CategoryPregnancy, childbirth and the puerperium (O00-O9A)
Excludes10 rule(s)
Excludes26 note(s)
Child codes4

Data Source

CMS ICD-10-CM 2026 Tabular List

Updated October 1, 2025 (FY2026)