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O29.4 ICD-10-CA subcategory: Spinal and epidural anaesthesia-induced headache during pregnancy

O29.4 isn’t a code on its own. Choose one of the 3 codes beneath it, the one the documentation supports.

Official description

O29.4

Spinal and epidural anaesthesia-induced headache during pregnancy

ICD-10-CA · Canada · Also written O294

Codes in O29.4

O29.4 isn’t a code on its own. Open the code that matches what the note documents.

O29.401Spinal and epidural anaesthesia-induced headache during pregnancy, delivered, with or without mention of antepartum conditionO29.403Spinal and epidural anaesthesia-induced headache during pregnancy, antepartum condition or complicationO29.409Spinal and epidural anaesthesia-induced headache during pregnancy, unspecified as to episode of care, or not applicable

Notes for O29.4

As CIHI prints them, with any note O29.4 takes from the headings above it.

Includes

Excludes

Conditions classified elsewhere.

  • Complications of anaesthesia during:• abortion or ectopic or molar pregnancy (O00-O08)• labour and delivery (O74.-)• puerperium (O89.-)From O29 Complications of anaesthesia during pregnancy
  • Maternal:• care related to the fetus and amniotic cavity and possible delivery problems (O30-O48)• diseases classifiable elsewhere but complicating pregnancy, labour and delivery, and the puerperium (O98-O99)From O20-O29 Other maternal disorders predominantly related to pregnancy
  • 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

  • Categories O24.- and O25.- include the listed conditions even if they occur during childbirth or the puerperium.From O20-O29 Other maternal disorders predominantly related to pregnancy
  • 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 O29.4 sits

  1. 1ChapterChapter 15: Pregnancy, childbirth and the puerperium (O00-O99)
  2. 2Block O20-O29Other maternal disorders predominantly related to pregnancy
  3. 3Category O29Complications of anaesthesia during pregnancy
  4. 4Subcategory O29.4Spinal and epidural anaesthesia-induced headache during pregnancy

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 O29.4 in the CIHI source

Frequently asked questions

Is O29.4 a valid ICD-10-CA code?

No. O29.4 (Spinal and epidural anaesthesia-induced headache during pregnancy) 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 O29.4 in ICD-10-CA?

O29.4 sits under O29 Complications of anaesthesia during pregnancy, within O20-O29 Other maternal disorders predominantly related to pregnancy, within Chapter 15: Pregnancy, childbirth and the puerperium (O00-O99).

What coding notes apply to O29.4?

ICD-10-CA lists Includes, Excludes, Note notes for O29.4, 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 O29.4

O29.0Pulmonary complications of anaesthesia during pregnancyO29.1Cardiac complications of anaesthesia during pregnancyO29.2Central nervous system complications of anaesthesia during pregnancyO29.3Toxic reaction to local anaesthesia during pregnancyO29.5Other complications of spinal and epidural anaesthesia during pregnancyO29.6Failed or difficult intubation during pregnancyO29.8Other complications of anaesthesia during pregnancyO29.9Complication of anaesthesia during pregnancy, unspecified