O66.1 is the ICD-10 code for Obstructed labour due to locked twins. It is a four-character subcategory of O66 (Other obstructed labour), the most specific level in the WHO edition. It belongs to the block O60–O75 (Complications of labour and delivery) in Chapter XV, Pregnancy, childbirth and the puerperium.
- Code type
- Subcategory (4 characters)
- Chapter
- XV · O00–O99
- Classification
- WHO ICD-10, 2019 version
O66.1 in national editions
Countries report with their own edition of ICD-10. Most keep the WHO code and add more specific codes beneath it.
O66.1Mekanisk hindret fødsel som skyldes «låste» tvillinger
DO661Fødsel kompliceret af tvillingekollision
O66.1Toisiinsa lukkiutuneiden kaksosten aiheuttama synnytyseste
O66.1Geburtshindernis durch verhakte Zwillinge
O66.1Dystocie gémellaire
O66.1moeilijke bevalling door verhaakte tweeling
O66.1Obstructed labor due to locked twins
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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