Is ICD-10-CM code O01 billable?

No, O01 (Hydatidiform mole) is a non-billable ICD-10-CM code. It must be coded to a more specific subcategory before it can be used for reimbursement.

What chapter does ICD-10-CM code O01 belong to?

O01 belongs to Chapter 15 of the ICD-10-CM tabular list: O00–O9A (Pregnancy, Childbirth and the Puerperium).

O01Not billable, use a more specific code below

Hydatidiform mole

In Pregnancy with abortive outcome (O00-O08), chapter 15: Pregnancy, Childbirth and the Puerperium

3 billable codes under O01: none are a CC or MCC; none map to an HCC.

Instructional notes

Excludes1: not coded here, use a different code

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

Use additional code: add a second code for this, listed after this one

code from category O08 to identify any associated complication.

Also applies, from Pregnancy with abortive outcome (O00-O08)

These notes sit on O00-O08 and apply to every code under it, including O01.

Excludes1: not coded here, use a different code

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

Official coding guidelines

From the ICD-10-CM Official Guidelines for Coding and Reporting, FY 2027 (CMS and NCHS). Links open the PDF at the right page.

Coding of obstetric cases with O00-O9A codes: sequencing priority, trimester and fetus characters, principal diagnosis selection, delivery outcome, and pregnancy-related complications.

General Rules for Obstetric Cases (page 63)
Selection of OB Principal or First-listed Diagnosis (page 64)
Pre-existing conditions versus conditions due to the pregnancy (page 65)
Pre-existing hypertension in pregnancy (page 66)
Fetal Conditions Affecting the Management of the Mother (page 66)
HIV Infection in Pregnancy, Childbirth and the Puerperium (page 66)
Diabetes mellitus in pregnancy (page 66)
Long term use of insulin and oral hypoglycemics (page 67)

Read Section I.C.15 (page 63), 11 more topics

All codes under O01

O01 can't be used on a claim. Pick a billable code below; grey headings group them.

O01 MS-DRGs

As the principal diagnosis, all 3 billable codes under O01 group to MS-DRG 817, 818, 819, 831, 832, or 833 (v44.0). Which one applies depends on procedures performed, secondary diagnoses (CC/MCC), and the patient's age and discharge status.

Other codes that refer to O01

Notes on these codes point to O01.

O02.1 Excludes1: missed abortion with hydatidiform mole (O01.-)
O02.8 Excludes1: abnormal products of conception with hydatidiform mole (O01.-)

About the condition

Plain-language background from MedlinePlus (National Library of Medicine), not coding guidance.

Tumors and Pregnancy

Tumors during pregnancy are rare, but they can happen. Tumors can be either benign (not cancer) or malignant (cancer). The most common cancers in pregnancy include breast cancer, thyroid cancer, cervical cancer, lymphoma, and melanoma. Cancer itself rarely harms the fetus, and some cancer treatments are safe during pregnancy. You and your health care provider will work together to find the best treatment. Your choices will depend on how far along the pregnancy is, as well as the type, size, and stage of your cancer.

Code history

Valid since FY2016, when ICD-10-CM took effect on October 1, 2015. No changes since.