O98.911 – Unspecified maternal infectious and parasitic disease complicating pregnancy, first trimester

ICD-10-CM 2027 diagnosis code · Other obstetric conditions, not elsewhere classified

Billable code

ICD-10-CM code O98.911

Code: O98.911 (claims format: O98911)
Description: Unspecified maternal infectious and parasitic disease complicating pregnancy, first trimester
Short description: Unsp maternal infec/parastc disease comp preg, first tri
Billable: Yes – valid for HIPAA-covered transactions
Valid for: Dates of service October 1, 2026 – September 30, 2027 (FY2027)
Chapter: 15. Pregnancy, childbirth and the puerperium (O00-O9A)
Block: O94-O9A Other obstetric conditions, not elsewhere classified
Parent codes: O98 › O98.9 › O98.91

Notes inherited from parent codes

Instructional notes at a category or block level apply to every code below it.

O98 – Maternal infectious and parasitic diseases classifiable elsewhere but complicating pregnancy, childbirth and the puerperium

Includes:

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

Excludes2 (not included here):

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:

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

Related codes in O98.91

Frequently asked questions

What is ICD-10 code O98.911?

O98.911 is the ICD-10-CM code for unspecified maternal infectious and parasitic disease complicating pregnancy, first trimester, in the block O94-O9A (Other obstetric conditions, not elsewhere classified).

Is O98.911 a billable code?

Yes. O98.911 is a billable/specific code that can be used to indicate a diagnosis for reimbursement purposes.

What category does O98.911 belong to?

It belongs to category O98 – Maternal infectious and parasitic diseases classifiable elsewhere but complicating pregnancy, childbirth and the puerperium.

Source: CDC/NCHS ICD-10-CM FY2027 code files, tabular list and index. Reference only – code assignment must follow the official ICD-10-CM guidelines and documentation in the medical record.