ICD-10-CM>O00-O9A>O30-O48>O31>O31.4>O31.43O31.43Continuing pregnancy after vanishing twin syndrome of one fetus or more, third trimesterNon-Billable/Non-SpecificCodesO31.43X0..., not applicable or unspecifiedO31.43X1..., fetus 1O31.43X2..., fetus 2O31.43X3..., fetus 3O31.43X4..., fetus 4O31.43X5..., fetus 5O31.43X9..., other fetus