The block O20–O29 of ICD-10 is titled “Other maternal disorders predominantly related to pregnancy”. It is part of Chapter XV, Pregnancy, childbirth and the puerperium, and holds 9 groups.
What O20–O29 excludes
Conditions that look similar but belong under another code.
Coding notes
- Categories O24.- and O25 include the listed conditions even if they occur during childbirth or the puerperium.
Codes in O20–O29
- O22.0Varicose veins of lower extremity in pregnancy
- O22.1Genital varices in pregnancy
- O22.2Superficial thrombophlebitis in pregnancy
- O22.3Deep phlebothrombosis in pregnancy
- O22.4Haemorrhoids in pregnancy
- O22.5Cerebral venous thrombosis in pregnancy
- O22.8Other venous complications in pregnancy
- O22.9Venous complication in pregnancy, unspecified
- O23.0Infections of kidney in pregnancy
- O23.1Infections of bladder in pregnancy
- O23.2Infections of urethra in pregnancy
- O23.3Infections of other parts of urinary tract in pregnancy
- O23.4Unspecified infection of urinary tract in pregnancy
- O23.5Infections of the genital tract in pregnancy
- O23.9Other and unspecified genitourinary tract infection in pregnancy
- O24.0Diabetes mellitus in pregnancy: Pre-existing diabetes mellitus, insulin-dependent
- O24.1Diabetes mellitus in pregnancy: Pre-existing diabetes mellitus, non-insulin-dependent
- O24.2Diabetes mellitus in pregnancy: Pre-existing malnutrition-related diabetes mellitus
- O24.3Diabetes mellitus in pregnancy: Pre-existing diabetes mellitus, unspecified
- O24.4Diabetes mellitus arising in pregnancy
- O24.9Diabetes mellitus in pregnancy, unspecified
- O26.0Excessive weight gain in pregnancy
- O26.1Low weight gain in pregnancy
- O26.2Pregnancy care of habitual aborter
- O26.3Retained intrauterine contraceptive device in pregnancy
- O26.4Herpes gestationis
- O26.5Maternal hypotension syndrome
- O26.6Liver disorders in pregnancy, childbirth and the puerperium
- O26.7Subluxation of symphysis (pubis) in pregnancy, childbirth and the puerperium
- O26.8Other specified pregnancy-related conditions
- O26.9Pregnancy-related condition, unspecified
- O28.0Abnormal haematological finding on antenatal screening of mother
- O28.1Abnormal biochemical finding on antenatal screening of mother
- O28.2Abnormal cytological finding on antenatal screening of mother
- O28.3Abnormal ultrasonic finding on antenatal screening of mother
- O28.4Abnormal radiological finding on antenatal screening of mother
- O28.5Abnormal chromosomal and genetic finding on antenatal screening of mother
- O28.8Other abnormal findings on antenatal screening of mother
- O28.9Abnormal finding on antenatal screening of mother, unspecified
- O29.0Pulmonary complications of anaesthesia during pregnancy
- O29.1Cardiac complications of anaesthesia during pregnancy
- O29.2Central nervous system complications of anaesthesia during pregnancy
- O29.3Toxic reaction to local anaesthesia during pregnancy
- O29.4Spinal and epidural anaesthesia-induced headache during pregnancy
- O29.5Other complications of spinal and epidural anaesthesia during pregnancy
- O29.6Failed or difficult intubation during pregnancy
- O29.8Other complications of anaesthesia during pregnancy
- O29.9Complication of anaesthesia during pregnancy, unspecified
Based on the World Health Organization’s International Statistical Classification of Diseases and Related Health Problems, 10th revision (ICD-10), 2019 version, and the national editions published by each country’s health authority. This page is a reference, not coding advice; follow your national coding rules when you report.
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