Is O98.511 a billable ICD-10-CM code?

Yes. O98.511 is a billable, specific ICD-10-CM code and is valid for submission on a claim.

Where does O98.511 sit in the tabular list?

Pregnancy, childbirth and the puerperium (O00-O9A), in the block Other obstetric conditions, not elsewhere classified (O94-O9A).

What cannot be coded together with O98.511?

O98.511 carries Excludes1 notes, which means the conditions they list can never be coded together with it on the same encounter. Some are written on the categories above O98.511 (O98.5) and apply to it just the same.

O98.511

O98.511 — Other viral diseases complicating pregnancy, first trimester

Billable / specific codeICD-10-CM

O98.511 is a billable, specific ICD-10-CM code for other viral diseases complicating pregnancy, first trimester. It is valid for submission on a claim.

Excludes1 inherited from the categories above O98.511

These are not written on O98.511, but they bind it: a note on a category applies to every code beneath it. Billing O98.511 with anything listed here is a denial.

Written on O98.5 — Other viral diseases complicating pregnancy, childbirth and the puerperium

human immunodeficiency virus [HIV] disease complicating pregnancy, childbirth and the puerperium (O98.7-)

Excludes2 inherited from the categories above O98.511

Also inherited, and the opposite of Excludes1: these conditions are not part of O98.511, but a patient can have both, so you may code both.

Written on O98 — Maternal infectious and parasitic diseases classifiable elsewhere but complicating pregnancy, childbirth and the puerperium

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)

Risk adjustment

O98.511 does not map to an HCC and does not risk-adjust under CMS-HCC V28. That is normal — most ICD-10 codes do not. It still needs to be coded correctly; it just will not move a RAF score.

Code history

O98.511 has not changed since FY2024 — no addition, revision or deletion across the three most recent ICD-10-CM releases.

Related codes at this level

Codes that share O98.51. If O98.511 is not quite right, the correct code is usually one of these.

Questions about O98.511

Is O98.511 a billable ICD-10-CM code?: Yes. O98.511 is a billable, specific ICD-10-CM code and is valid for submission on a claim.
Where does O98.511 sit in the tabular list?: Pregnancy, childbirth and the puerperium (O00-O9A), in the block Other obstetric conditions, not elsewhere classified (O94-O9A).
What cannot be coded together with O98.511?: O98.511 carries Excludes1 notes, which means the conditions they list can never be coded together with it on the same encounter. Some are written on the categories above O98.511 (O98.5) and apply to it just the same.