O35.023 ICD-10-CA code: Maternal care for (suspected) fetal hydrocephalus, antepartum condition or complication
O35.023 is the ICD-10-CA code for “Maternal care for (suspected) fetal hydrocephalus, antepartum condition or complication” in CIHI’s FY 2026–2027 release, in effect from Apr 1, 2026.
Official description
O35.023Maternal care for (suspected) fetal hydrocephalus, antepartum condition or complication
Short description: Mat care (susp) hydrocephalus/antepartum
ICD-10-CA · Canada · Also written O35023
Notes for O35.023
As CIHI prints them, with any note O35.023 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 pregnancyFrom O35 Maternal care for known or suspected fetal abnormality and damage
Excludes
Conditions classified elsewhere.
- • chromosomal abnormality in fetus (O35.1)From O35.02 Maternal care for (suspected) fetal hydrocephalus
- Maternal care for known or suspected disproportion (O33.-)From O35 Maternal care for known or suspected fetal abnormality and damage
- 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 O35.023 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
- 4Subcategory O35.0Maternal care for (suspected) central nervous system malformation in fetus
- 5Subcategory O35.02Maternal care for (suspected) fetal hydrocephalus
- 6Valid code O35.023Maternal care for (suspected) fetal hydrocephalus, antepartum condition or complication
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 O35.023 mean?
O35.023 is the ICD-10-CA code for “Maternal care for (suspected) fetal hydrocephalus, antepartum condition or complication” in CIHI’s ICD-10-CA FY 2026–2027 release.
Where is O35.023 in ICD-10-CA?
O35.023 sits under O35.02 Maternal care for (suspected) fetal hydrocephalus, within O35.0 Maternal care for (suspected) central nervous system malformation in fetus, within O35 Maternal care for known or suspected fetal abnormality and damage, 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 O35.023?
ICD-10-CA lists Excludes, Includes, Note notes for O35.023, 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.