O15.9 ICD-10-CA subcategory: Eclampsia, unspecified as to time period
O15.9 isn’t a code on its own. Choose one of the 1 code beneath it, the one the documentation supports.
Official description
O15.9Eclampsia, unspecified as to time period
ICD-10-CA · Canada · Also written O159
Codes in O15.9
O15.9 isn’t a code on its own. Open the code that matches what the note documents.
Notes for O15.9
As CIHI prints them, with any note O15.9 takes from the headings above it.
Includes
- • Eclampsia NOS
- Convulsions following conditions in O10-O14 and O16eclampsia with pregnancy-induced or pre-existing hypertensionFrom O15 Eclampsia
Use additional code
Add a code for this detail when the note documents it.
- Use additional code to identify any associated status epilepticus (G41.0)From O15 Eclampsia
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 O15.9 sits
- 1ChapterChapter 15: Pregnancy, childbirth and the puerperium (O00-O99)
- 2Block O10-O16Oedema, proteinuria and hypertensive disorders in pregnancy, childbirth and the puerperium
- 3Category O15Eclampsia
- 4Subcategory O15.9Eclampsia, unspecified as to time period
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 O15.9 a valid ICD-10-CA code?
No. O15.9 (Eclampsia, unspecified as to time period) is a subcategory heading in CIHI’s ICD-10-CA FY 2026–2027 release. It holds 1 code; record the one the documentation supports.
Where is O15.9 in ICD-10-CA?
O15.9 sits under O15 Eclampsia, 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 O15.9?
ICD-10-CA lists Includes, Use additional code, Note, Excludes notes for O15.9, 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.