Is O46 a billable ICD-10-CM code?

No. O46 is a non-billable header code. Code to a higher level of specificity using one of its child codes.

Where does O46 sit in the tabular list?

Pregnancy, childbirth and the puerperium (O00-O9A), in the block Maternal care related to the fetus and amniotic cavity and possible delivery problems (O30-O48).

What cannot be coded together with O46?

O46 carries an Excludes1 note, which means the conditions it lists can never be coded together with it on the same encounter.

O46

O46 — Antepartum hemorrhage, not elsewhere classified

Non-billable headerICD-10-CM

O46 is a non-billable header ICD-10-CM code for antepartum hemorrhage, not elsewhere classified. It cannot be billed on its own: choose one of the more specific child codes below.

Excludes1 — never code together

These conditions cannot occur together. Billing both on the same encounter is a denial.

hemorrhage in early pregnancy (O20.-)
intrapartum hemorrhage NEC (O67.-)
placenta previa (O44.-)
premature separation of placenta [abruptio placentae] (O45.-)

Other codes that can never be billed with O46

These codes carry an Excludes1 note pointing at O46. The conflict binds both ways, but ICD-10-CM only writes it down on one side — so you would not find this by reading O46 alone.

O67Labor and delivery complicated by intrapartum hemorrhage, not elsewhere classified
O99.1Other diseases of the blood and blood-forming organs and certain disorders involving the immune mechanism complicating pregnancy, childbirth and the puerperium
D65Disseminated intravascular coagulation [defibrination syndrome]

Risk adjustment

O46 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 O46

3 child codes. Green means billable.

Questions about O46

Is O46 a billable ICD-10-CM code?: No. O46 is a non-billable header code. Code to a higher level of specificity using one of its child codes.
Where does O46 sit in the tabular list?: Pregnancy, childbirth and the puerperium (O00-O9A), in the block Maternal care related to the fetus and amniotic cavity and possible delivery problems (O30-O48).
What cannot be coded together with O46?: O46 carries an Excludes1 note, which means the conditions it lists can never be coded together with it on the same encounter.