O66.309 ICD-10-CA code: Obstructed labour due to other abnormalities of fetus, unspecified as to episode of care, or not applicable
O66.309 is the ICD-10-CA code for “Obstructed labour due to other abnormalities of fetus, unspecified as to episode of care, or not applicable” in CIHI’s FY 2026–2027 release, in effect from Apr 1, 2026.
Official description
O66.309Obstructed labour due to other abnormalities of fetus, unspecified as to episode of care, or not applicable
Short description: Obs labour dt oth abn fetus/unspec
ICD-10-CA · Canada · Also written O66309
Notes for O66.309
As CIHI prints them, with any note O66.309 takes from the headings above it.
Includes
- • Dystocia due to conjoined twins• Dystocia due to fetal ascites• Dystocia due to fetal hydrops• Dystocia due to fetal meningomyelocele• Dystocia due to fetal sacral teratoma• Dystocia due to fetal tumour• Dystocia due to hydrocephalic fetusFrom O66.3 Obstructed labour due to other abnormalities of fetus
Excludes
Conditions classified elsewhere.
- 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 O66.309 sits
- 1ChapterChapter 15: Pregnancy, childbirth and the puerperium (O00-O99)
- 2Block O60-O75Complications of labour and delivery
- 3Category O66Other obstructed labour
- 4Subcategory O66.3Obstructed labour due to other abnormalities of fetus
- 5Valid code O66.309Obstructed labour due to other abnormalities of fetus, unspecified as to episode of care, or not applicable
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 O66.309 mean?
O66.309 is the ICD-10-CA code for “Obstructed labour due to other abnormalities of fetus, unspecified as to episode of care, or not applicable” in CIHI’s ICD-10-CA FY 2026–2027 release.
Where is O66.309 in ICD-10-CA?
O66.309 sits under O66.3 Obstructed labour due to other abnormalities of fetus, within O66 Other obstructed labour, within O60-O75 Complications of labour and delivery, within Chapter 15: Pregnancy, childbirth and the puerperium (O00-O99).
What coding notes apply to O66.309?
ICD-10-CA lists Includes, Note, Excludes notes for O66.309, 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.