O01.9 – Hydatidiform mole, unspecified

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

Billable code

ICD-10-CM code O01.9

Code: O01.9 (claims format: O019)
Description: Hydatidiform mole, unspecified
Billable: Yes – valid for HIPAA-covered transactions
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
Parent codes: O01

Notes for O01.9

Applicable to:

Trophoblastic disease NOS
Vesicular mole NOS

Notes inherited from parent codes

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

O01 – Hydatidiform mole

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.

Block O00-O08

Excludes1 (not coded here):

continuing pregnancy in multiple gestation after abortion of one fetus or more (O31.1-, O31.3-)

Index terms for O01.9

Entries in the ICD-10-CM alphabetic index that lead to this code:

Related codes in O01

O01.0 – Classical hydatidiform moleBillable
O01.1 – Incomplete and partial hydatidiform moleBillable

Frequently asked questions

What is ICD-10 code O01.9?

O01.9 is the ICD-10-CM code for hydatidiform mole, unspecified, in the block O00-O08 (Pregnancy with abortive outcome).

Is O01.9 a billable code?

Yes. O01.9 is a billable/specific code that can be used to indicate a diagnosis for reimbursement purposes.

What category does O01.9 belong to?

It belongs to category O01 – Hydatidiform mole.

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.