O01.1 ICD-10-CA code: Incomplete and partial hydatidiform mole
O01.1 is the ICD-10-CA code for “Incomplete and partial hydatidiform mole” in CIHI’s FY 2026–2027 release, in effect from Apr 1, 2026.
Official description
O01.1Incomplete and partial hydatidiform mole
ICD-10-CA · Canada · Also written O011
Index terms
Entries in CIHI’s alphabetical index that lead to O01.1. Searching the index by the condition the note names is how coders reach this code.
- Hydatidiform mole (benign) (complicating pregnancy) (delivered) (undelivered), partial
- Mole (pigmented), hydatid, hydatidiform (benign) (complicating pregnancy) (delivered) (undelivered), partial
- Mole (pigmented), hydatid, hydatidiform (benign) (complicating pregnancy) (delivered) (undelivered), incomplete
Notes for O01.1
As CIHI prints them, with any note O01.1 takes from the headings above it.
Use additional code
Add a code for this detail when the note documents it.
- Use additional code from category O08.- to identify any associated complication.From O01 Hydatidiform mole
Excludes
Conditions classified elsewhere.
- Malignant hydatidiform mole (D39.2)From O01 Hydatidiform mole
- Continuing pregnancy in multiple gestation after abortion of one fetus or more (O31.11-)From O00-O08 Pregnancy with abortive outcome
- Certain diseases or injuries complicating pregnancy, childbirth, and the puerperium classified elsewhere:external causes (for mortality) (V,W,X,Y)injury, poisoning and certain other consequences of external causes (S00-T88.1, T88.6-T98)mental and behavioural disorders associated with the puerperium (F53.-)obstetrical tetanus (A34)postpartum necrosis of pituitary gland (E23.0)puerperal osteomalacia (M83.0)supervision of:• high-risk pregnancy (Z35.-)• normal pregnancy (Z34.-)From Chapter 15: Pregnancy, childbirth and the puerperium (O00-O99)
Note
- The codes included in this chapter are to be used for conditions related to or aggravated by the pregnancy, childbirth or by the puerperium (maternal causes or obstetric causes)From Chapter 15: Pregnancy, childbirth and the puerperium (O00-O99)
Where O01.1 sits
- 1ChapterChapter 15: Pregnancy, childbirth and the puerperium (O00-O99)
- 2Block O00-O08Pregnancy with abortive outcome
- 3Category O01Hydatidiform mole
- 4Valid code O01.1Incomplete and partial hydatidiform mole
Source and release
- Data release
- ICD-10-CA · FY 2026–2027
- Effective date
- Apr 1, 2026
- Publisher
- CIHI
This page is built from the ICD-10-CA catalog that Vero Codes reads when it suggests codes: Canadian Institute for Health Information’s FY 2026–2027 release, imported from the publisher’s file and checked against it. The description, notes and structured data come from the same record.
Frequently asked questions
What does ICD-10-CA code O01.1 mean?
O01.1 is the ICD-10-CA code for “Incomplete and partial hydatidiform mole” in CIHI’s ICD-10-CA FY 2026–2027 release.
Where is O01.1 in ICD-10-CA?
O01.1 sits under O01 Hydatidiform mole, within O00-O08 Pregnancy with abortive outcome, within Chapter 15: Pregnancy, childbirth and the puerperium (O00-O99).
What coding notes apply to O01.1?
ICD-10-CA lists Use additional code, Excludes, Note notes for O01.1, including those from the headings it sits under. They are listed on this page with where each one comes from.
Which ICD-10-CA release does this page use?
It uses CIHI’s FY 2026–2027 release, in effect from Apr 1, 2026 to Mar 31, 2027. It is a reference: confirm the code against the current list and the payer’s rules before you submit it.