V31 Twin birth mate liveborn 
V31.0 Twin birth mate liveborn born in hospital 
V31.00 Twin birth, mate liveborn, born in hospital, delivered without mention of cesarean section convert V31.00 to ICD-10-CM
V31.01 Twin birth, mate liveborn, born in hospital, delivered by cesarean section convert V31.01 to ICD-10-CM- V31.1 Twin birth, mate liveborn, born before admission to hospital convert V31.1 to ICD-10-CM
- V31.2 Twin birth, mate liveborn, born outside hospital and not hospitalized convert V31.2 to ICD-10-CM
