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O26.003 ICD-10-CA code: Excessive weight gain in pregnancy, antepartum condition or complication

O26.003 is the ICD-10-CA code for “Excessive weight gain in pregnancy, antepartum condition or complication” in CIHI’s FY 2026–2027 release, in effect from Apr 1, 2026.

Official description

O26.003

Excessive weight gain in pregnancy, antepartum condition or complication

Short description: Excess wt gain in pregnancy/antepartum

ICD-10-CA · Canada · Also written O26003

Notes for O26.003

As CIHI prints them, with any note O26.003 takes from the headings above it.

Excludes

Conditions classified elsewhere.

  • • gestational oedema (O12.0) (O12.2)From O26.0 Excessive weight gain in 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 O26.003 sits

  1. 1ChapterChapter 15: Pregnancy, childbirth and the puerperium (O00-O99)
  2. 2Block O20-O29Other maternal disorders predominantly related to pregnancy
  3. 3Category O26Maternal care for other conditions predominantly related to pregnancy
  4. 4Subcategory O26.0Excessive weight gain in pregnancy
  5. 5Valid code O26.003Excessive weight gain in pregnancy, 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.

See O26.003 in the CIHI source

Frequently asked questions

What does ICD-10-CA code O26.003 mean?

O26.003 is the ICD-10-CA code for “Excessive weight gain in pregnancy, antepartum condition or complication” in CIHI’s ICD-10-CA FY 2026–2027 release.

Where is O26.003 in ICD-10-CA?

O26.003 sits under O26.0 Excessive weight gain in pregnancy, within O26 Maternal care for other conditions predominantly related to 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 O26.003?

ICD-10-CA lists Excludes, Note notes for O26.003, 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 O26.003

O26.001Excessive weight gain in pregnancy, delivered, with or without mention of antepartum conditionO26.002Excessive weight gain in pregnancy, delivered, with mention of postpartum complicationO26.004Excessive weight gain in pregnancy, postpartum condition or complicationO26.009Excessive weight gain in pregnancy, unspecified as to episode of care, or not applicable