O01 – Hydatidiform mole

ICD-10-CM 2027 diagnosis code · Pregnancy with abortive outcome

Non-billable header

ICD-10-CM code O01
Code
O01 (claims format: O01)
Description
Hydatidiform mole
Billable
No – use a more specific code below
Valid for
Dates of service October 1, 2026 – September 30, 2027 (FY2027)
Chapter
15. Pregnancy, childbirth and the puerperium (O00-O9A)
Block
O00-O08 Pregnancy with abortive outcome

Billable codes under O01

O01 is a header code and cannot be used on claims. Choose the most specific code:

Notes for O01

Excludes1 (not coded here):
  • chorioadenoma (destruens) (D39.2)
  • malignant hydatidiform mole (D39.2)
Use additional code:
  • code from category O08 to identify any associated complication.

Notes inherited from parent codes

Instructional notes at a category or block level apply to every code below it.

Block O00-O08

Excludes1 (not coded here):
  • continuing pregnancy in multiple gestation after abortion of one fetus or more (O31.1-, O31.3-)

Frequently asked questions

What is ICD-10 code O01?

O01 is the ICD-10-CM code for hydatidiform mole, in the block O00-O08 (Pregnancy with abortive outcome).

Is O01 a billable code?

No. O01 is a header code with more specific child codes; report one of the billable codes listed above.

Source: CDC/NCHS ICD-10-CM FY2027 code files, tabular list and index. Reference only – code assignment must follow the official ICD-10-CM guidelines and documentation in the medical record.