Is O73 a billable ICD-10-CM code?

No. O73 is a non-billable header code. Code to a higher level of specificity using one of its child codes.

Where does O73 sit in the tabular list?

Pregnancy, childbirth and the puerperium (O00-O9A), in the block Complications of labor and delivery (O60-O77).

What cannot be coded together with O73?

O73 carries an Excludes1 note, which means the conditions it lists can never be coded together with it on the same encounter.

O73

O73 — Retained placenta and membranes, without hemorrhage

Non-billable headerICD-10-CM

O73 is a non-billable header ICD-10-CM code for retained placenta and membranes, without hemorrhage. 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.

placenta accreta (O43.21-)
placenta increta (O43.22-)
placenta percreta (O43.23-)

Other codes that can never be billed with O73

These codes carry an Excludes1 note pointing at O73. The conflict binds both ways, but ICD-10-CM only writes it down on one side — so you would not find this by reading O73 alone.

O43.2Morbidly adherent placenta

Risk adjustment

O73 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 O73

2 child codes. Green means billable.

Questions about O73

Is O73 a billable ICD-10-CM code?: No. O73 is a non-billable header code. Code to a higher level of specificity using one of its child codes.
Where does O73 sit in the tabular list?: Pregnancy, childbirth and the puerperium (O00-O9A), in the block Complications of labor and delivery (O60-O77).
What cannot be coded together with O73?: O73 carries an Excludes1 note, which means the conditions it lists can never be coded together with it on the same encounter.