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O11.009 ICD-10-CA code: Pre-eclampsia superimposed on chronic hypertension, unspecified as to episode of care, or not applicable

O11.009 is the ICD-10-CA code for “Pre-eclampsia superimposed on chronic hypertension, unspecified as to episode of care, or not applicable” in CIHI’s FY 2026–2027 release, in effect from Apr 1, 2026.

Official description

O11.009

Pre-eclampsia superimposed on chronic hypertension, unspecified as to episode of care, or not applicable

Short description: Preeclam superimp chronic hypert/unspec

ICD-10-CA · Canada · Also written O11009

Notes for O11.009

As CIHI prints them, with any note O11.009 takes from the headings above it.

Includes

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

  • In order to satisfy the needs of the Canadian grouping methodology, appropriate codes in the range O10.0 to O99.8 will have a supplementary subclassification placed at the end of the code to identify the following:1 Delivered, with or without mention of antepartum conditionAntepartum condition with delivery, Delivery NOS, Intrapartum obstetric condition, Pregnancy delivered — with or without mention of antepartum or intrapartum complication during the current episode of care2 Delivered with mention of postpartumDelivery, Pregnancy, delivered — with mention of postpartum or puerperal complication during the current episode of care3 Antepartum condition or complicationAntepartum obstetric condition, not delivered during the current episode of care4 Postpartum condition or complicationPostpartum or puerperal obstetric condition or complication following delivery that occurred:• During previous episode of care• Outside hospital with subsequent admission for observation or care9 Unspecified as to episode of careFrom O10-O16 Oedema, proteinuria and hypertensive disorders in pregnancy, childbirth and the puerperium
  • 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 O11.009 sits

  1. 1ChapterChapter 15: Pregnancy, childbirth and the puerperium (O00-O99)
  2. 2Block O10-O16Oedema, proteinuria and hypertensive disorders in pregnancy, childbirth and the puerperium
  3. 3Category O11Pre-eclampsia superimposed on chronic hypertension
  4. 4Valid code O11.009Pre-eclampsia superimposed on chronic hypertension, 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.

See O11.009 in the CIHI source

Frequently asked questions

What does ICD-10-CA code O11.009 mean?

O11.009 is the ICD-10-CA code for “Pre-eclampsia superimposed on chronic hypertension, unspecified as to episode of care, or not applicable” in CIHI’s ICD-10-CA FY 2026–2027 release.

Where is O11.009 in ICD-10-CA?

O11.009 sits under O11 Pre-eclampsia superimposed on chronic hypertension, within O10-O16 Oedema, proteinuria and hypertensive disorders in pregnancy, childbirth and the puerperium, within Chapter 15: Pregnancy, childbirth and the puerperium (O00-O99).

What coding notes apply to O11.009?

ICD-10-CA lists Includes, Note, Excludes notes for O11.009, 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 O11.009

O11.001Pre-eclampsia superimposed on chronic hypertension, delivered, with or without mention of antepartum conditionO11.002Pre-eclampsia superimposed on chronic hypertension, delivered, with mention of postpartum complicationO11.003Pre-eclampsia superimposed on chronic hypertension, antepartum condition or complicationO11.004Pre-eclampsia superimposed on chronic hypertension, postpartum condition or complication