O98.51 – Other viral diseases complicating pregnancy

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

Non-billable header

ICD-10-CM code O98.51
Code
O98.51 (claims format: O9851)
Description
Other viral diseases complicating pregnancy
Billable
No – use a more specific code below
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 › O98.5

Billable codes under O98.51

O98.51 is a header code and cannot be used on claims. Choose the most specific code:

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

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

Applicable to:
Excludes1 (not coded here):
  • human immunodeficiency virus [HIV] disease complicating pregnancy, childbirth and the puerperium (O98.7-)

Index terms for O98.51

Entries in the ICD-10-CM alphabetic index that lead to this code:

Related codes in O98.5

Frequently asked questions

What is ICD-10 code O98.51?

O98.51 is the ICD-10-CM code for other viral diseases complicating pregnancy, in the block O94-O9A (Other obstetric conditions, not elsewhere classified).

Is O98.51 a billable code?

No. O98.51 is a header code with more specific child codes; report one of the billable codes listed above.

What category does O98.51 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.