Is O99 a billable ICD-10-CM code?

No. O99 is a non-billable header code. Code to a higher level of specificity using one of its child codes.

Where does O99 sit in the tabular list?

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

O99

O99 — Other maternal diseases classifiable elsewhere but complicating pregnancy, childbirth and the puerperium

Non-billable headerICD-10-CM

O99 is a non-billable header ICD-10-CM code for other maternal diseases classifiable elsewhere but complicating pregnancy, childbirth and the puerperium. It cannot be billed on its own: choose one of the more specific child codes below.

Excludes2 — not included here, but may coexist

The excluded condition is not part of this code, but a patient can have both. You may code both.

when the reason for maternal care is that the condition is known or suspected to have affected the fetus (O35-O36)

Use additional code

Add a secondary code to capture the detail described below.

code to identify specific condition

Includes

Conditions this code covers.

conditions which complicate the pregnant state, are aggravated by the pregnancy or are a main reason for obstetric care

Other codes that can never be billed with O99

These codes carry an Excludes1 note pointing at O99. The conflict binds both ways, but ICD-10-CM only writes it down on one side — so you would not find this by reading O99 alone.

O90.3Peripartum cardiomyopathy
O90.81Anemia of the puerperium
R73.0Abnormal glucose
Z22.330Carrier of Group B streptococcus
Z72.0Tobacco use
Z98.84Bariatric surgery status

Risk adjustment

O99 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 to one of these instead O99

9 child codes. Green means billable.

Questions about O99

Is O99 a billable ICD-10-CM code?: No. O99 is a non-billable header code. Code to a higher level of specificity using one of its child codes.
Where does O99 sit in the tabular list?: Pregnancy, childbirth and the puerperium (O00-O9A), in the block Other obstetric conditions, not elsewhere classified (O94-O9A).