O31.121 ICD-10-CA code: Continuing pregnancy after selective fetal reduction of one fetus or more, delivered, with or without mention of antepartum condition
O31.121 is the ICD-10-CA code for “Continuing pregnancy after selective fetal reduction of one fetus or more, delivered, with or without mention of antepartum condition” in CIHI’s FY 2026–2027 release, in effect from Apr 1, 2026.
Official description
O31.121Continuing pregnancy after selective fetal reduction of one fetus or more, delivered, with or without mention of antepartum condition
Short description: Cont preg af sel fet red >=1 fetus/deliv
ICD-10-CA · Canada · Also written O31121
Notes for O31.121
As CIHI prints them, with any note O31.121 takes from the headings above it.
Excludes
Conditions classified elsewhere.
- Conjoined twins causing disproportion (O33.7-)delayed delivery of second twin, triplet, etc. (O63.2-)malpresentation of one fetus or more (O32.5-)with obstructed labour (O64-O66)From O31 Complications specific to multiple gestation
- 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 O31.121 sits
- 1ChapterChapter 15: Pregnancy, childbirth and the puerperium (O00-O99)
- 2Block O30-O48Maternal care related to the fetus and amniotic cavity and possible delivery problems
- 3Category O31Complications specific to multiple gestation
- 4Subcategory O31.12Continuing pregnancy after selective fetal reduction of one fetus or more
- 5Valid code O31.121Continuing pregnancy after selective fetal reduction of one fetus or more, delivered, with or without mention of antepartum condition
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 O31.121 mean?
O31.121 is the ICD-10-CA code for “Continuing pregnancy after selective fetal reduction of one fetus or more, delivered, with or without mention of antepartum condition” in CIHI’s ICD-10-CA FY 2026–2027 release.
Where is O31.121 in ICD-10-CA?
O31.121 sits under O31.12 Continuing pregnancy after selective fetal reduction of one fetus or more, within O31 Complications specific to multiple gestation, within O30-O48 Maternal care related to the fetus and amniotic cavity and possible delivery problems, within Chapter 15: Pregnancy, childbirth and the puerperium (O00-O99).
What coding notes apply to O31.121?
ICD-10-CA lists Excludes, Note notes for O31.121, 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.