O34.20 ICD-10-CA subcategory: Uterine scar due to previous caesarean section
O34.20 isn’t a code on its own. Choose one of the 3 codes beneath it, the one the documentation supports.
Official description
O34.20Uterine scar due to previous caesarean section
ICD-10-CA · Canada · Also written O3420
Codes in O34.20
O34.20 isn’t a code on its own. Open the code that matches what the note documents.
O34.201Maternal care for uterine scar due to previous caesarean section, delivered, with or without mention of antepartum conditionO34.203Maternal care for uterine scar due to previous caesarean section, antepartum condition or complicationO34.209Maternal care for uterine scar due to previous caesarean section, unspecified as to episode of care, or not applicableNotes for O34.20
As CIHI prints them, with any note O34.20 takes from the headings above it.
Includes
- • Caesarean section with previous caesarean section (scar)• Maternal care for scar from previous caesarean section
- The listed conditions as a reason for observation, hospitalization or other obstetric care of the mother, or for caesarean section before onset of labourFrom O34 Maternal care for known or suspected abnormality of pelvic organs
Excludes
Conditions classified elsewhere.
- • vaginal delivery following previous caesarean section NOS [VBAC] (O75.7)
- The listed conditions with obstructed labour (O65.5) and (O66.-)From O34 Maternal care for known or suspected abnormality of pelvic organs
- 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 O34.20 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 O34Maternal care for known or suspected abnormality of pelvic organs
- 4Subcategory O34.2Maternal care due to uterine scar from previous surgery
- 5Subcategory O34.20Uterine scar due to previous caesarean section
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 O34.20 a valid ICD-10-CA code?
No. O34.20 (Uterine scar due to previous caesarean section) is a subcategory heading in CIHI’s ICD-10-CA FY 2026–2027 release. It holds 3 codes; record the one the documentation supports.
Where is O34.20 in ICD-10-CA?
O34.20 sits under O34.2 Maternal care due to uterine scar from previous surgery, within O34 Maternal care for known or suspected abnormality of pelvic organs, 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 O34.20?
ICD-10-CA lists Includes, Excludes, Note notes for O34.20, 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.