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O01

O01Hydatidiform mole

Non-billable headerICD-10-CM

O01 is a non-billable header ICD-10-CM code for hydatidiform mole. 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.

  • chorioadenoma (destruens) (D39.2)
  • malignant hydatidiform mole (D39.2)

Use additional code

Add a secondary code to capture the detail described below.

  • code from category O08 to identify any associated complication.

Other codes that can never be billed with O01

These codes carry an Excludes1 note pointing at O01. The conflict binds both ways, but ICD-10-CM only writes it down on one side — so you would not find this by reading O01 alone.

  • C58Malignant neoplasm of placenta
  • O02.1Missed abortion
  • O02.8Other specified abnormal products of conception
  • D39.2Neoplasm of uncertain behavior of placenta

Risk adjustment

O01 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 O01

3 child codes. Green means billable.

Questions about O01

Is O01 a billable ICD-10-CM code?
No. O01 is a non-billable header code. Code to a higher level of specificity using one of its child codes.
Where does O01 sit in the tabular list?
Pregnancy, childbirth and the puerperium (O00-O9A), in the block Pregnancy with abortive outcome (O00-O08).
What cannot be coded together with O01?
O01 carries an Excludes1 note, which means the conditions it lists can never be coded together with it on the same encounter.
ICD-10-CMFY2026-Apr· effective April 1, 2026

Loaded directly from the CMS/NCHS ICD-10-CM public-domain release — see data sources and our editorial policy. If this page disagrees with the CMS tabular list, this page is wrong. Reference information for professional coders; not medical or billing advice.