New code ยท FY2027
Billable: use this code on claims.
- New code, effective October 1, 2026 (FY2027). Before that, this condition was coded as O31.8X33.
Code breakdown
O31.43X3
- O31CategoryComplications specific to multiple gestation
- 4Character 4Continuing pregnancy after vanishing twin syndrome of one fetus or more
- 3Character 5Continuing pregnancy after vanishing twin syndrome of one fetus or more, third trimester
- XPlaceholderX fills the empty positions so the 7th character stays in position 7
- 37th characterfetus 3
Coding notes
Excludes2 (from O31)
- delayed delivery of second twin, triplet, etc. (O63.2)
- malpresentation of one fetus or more (O32.9)
- placental transfusion syndromes (O43.0-)
7th character (from O31)
- One of the following 7th characters is to be assigned to each code under category O31. 7th character 0 is for single gestations and multiple gestations where the fetus is unspecified. 7th characters 1 through 9 are for cases of multiple gestations to identify the fetus for which the code applies. The appropriate code from category O30, Multiple gestation, must also be assigned when assigning a code from category O31 that has a 7th character of 1 through 9.
7th characters (category O31)
- 0 not applicable or unspecified
- 1 fetus 1
- 2 fetus 2
- 3 fetus 3
- 4 fetus 4
- 5 fetus 5
- 9 other fetus
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ICD-10-CM codes and descriptions are from the CMS and NCHS code files. Coverage is from the CMS Medicare Coverage Database billing and coding articles.