O35 ICD-10-CA category: Maternal care for known or suspected fetal abnormality and damage
O35 isn’t a code on its own. Choose one of the 45 codes beneath it, the one the documentation supports.
Official description
O35Maternal care for known or suspected fetal abnormality and damage
ICD-10-CA · Canada
Codes in O35
O35 isn’t a code on its own. Open the group that matches what the note documents.
O35.0Maternal care for (suspected) central nervous system malformation in fetus (18 codes)O35.1Maternal care for (suspected) chromosomal abnormality in fetus (3 codes)O35.2Maternal care for (suspected) hereditary disease in fetus (3 codes)O35.3Maternal care for (suspected) damage to fetus from viral disease in mother (3 codes)O35.4Maternal care for (suspected) damage to fetus from alcohol (3 codes)O35.5Maternal care for (suspected) damage to fetus by drugs (3 codes)O35.6Maternal care for (suspected) damage to fetus by radiation (3 codes)O35.7Maternal care for (suspected) damage to fetus by other medical procedures (3 codes)O35.8Maternal care for other (suspected) fetal abnormality and damage (3 codes)O35.9Maternal care for (suspected) fetal abnormality and damage, unspecified (3 codes)Notes for O35
As CIHI prints them, with any note O35 takes from the headings above it.
Includes
- The listed conditions in the fetus as a reason for observation, hospitalization or other obstetric care of the mother, or for termination of pregnancy
Excludes
Conditions classified elsewhere.
- Maternal care for known or suspected disproportion (O33.-)
- 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 O35 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 O35Maternal care for known or suspected fetal abnormality and damage
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
Is O35 a valid ICD-10-CA code?
No. O35 (Maternal care for known or suspected fetal abnormality and damage) is a category heading in CIHI’s ICD-10-CA FY 2026–2027 release. It holds 45 codes; record the one the documentation supports.
Where is O35 in ICD-10-CA?
O35 sits under 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 O35?
ICD-10-CA lists Includes, Excludes, Note notes for O35, 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.
Codes beside O35
View O30-O48O30Multiple gestationO31Complications specific to multiple gestationO32Maternal care for known or suspected malpresentation of fetusO33Maternal care for known or suspected disproportionO34Maternal care for known or suspected abnormality of pelvic organsO36Maternal care for other known or suspected fetal problemsO37Maternal care for decreased fetal movementsO40PolyhydramniosO41Other disorders of amniotic fluid and membranesO42Premature rupture of membranesO43Placental disordersO44Placenta praeviaO45Premature separation of placenta [abruptio placentae]O46Antepartum haemorrhage, not elsewhere classifiedO47False labourO48Prolonged pregnancy