O31.42X1 – Continuing pregnancy after vanishing twin syndrome of one fetus or more, second trimester, fetus 1
ICD-10-CM 2027 diagnosis code · Maternal care related to the fetus and amniotic cavity and possible delivery problems
- Code
O31.42X1(claims format:O3142X1)- Description
- Continuing pregnancy after vanishing twin syndrome of one fetus or more, second trimester, fetus 1
- Short description
- Cont preg aft vanishing twin syn 1 fts or more,2nd tri,fts1
- Billable
- Yes – valid for HIPAA-covered transactions
- Valid for
- Dates of service October 1, 2026 – September 30, 2027 (FY2027)
- Chapter
- 15. Pregnancy, childbirth and the puerperium (O00-O9A)
- Block
- O30-O48 Maternal care related to the fetus and amniotic cavity and possible delivery problems
- Parent codes
- O31 › O31.4 › O31.42
7th character values
Codes in this category need a 7th character to describe the encounter or episode of care.
| Character | Meaning |
|---|---|
0 | not applicable or unspecified |
1 | fetus 1 |
2 | fetus 2 |
3 | fetus 3 |
4 | fetus 4 |
5 | fetus 5 |
9 | other fetus |
Notes inherited from parent codes
Instructional notes at a category or block level apply to every code below it.
O31 – Complications specific to multiple gestation
- 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.
Related codes in O31.42
- O31.42X0 – Continuing pregnancy after vanishing twin syndrome of one fetus or more, second trimester, not applicable or unspecifiedBillable
- O31.42X2 – Continuing pregnancy after vanishing twin syndrome of one fetus or more, second trimester, fetus 2Billable
- O31.42X3 – Continuing pregnancy after vanishing twin syndrome of one fetus or more, second trimester, fetus 3Billable
- O31.42X4 – Continuing pregnancy after vanishing twin syndrome of one fetus or more, second trimester, fetus 4Billable
- O31.42X5 – Continuing pregnancy after vanishing twin syndrome of one fetus or more, second trimester, fetus 5Billable
- O31.42X9 – Continuing pregnancy after vanishing twin syndrome of one fetus or more, second trimester, other fetusBillable
Frequently asked questions
What is ICD-10 code O31.42X1?
O31.42X1 is the ICD-10-CM code for continuing pregnancy after vanishing twin syndrome of one fetus or more, second trimester, fetus 1, in the block O30-O48 (Maternal care related to the fetus and amniotic cavity and possible delivery problems).
Is O31.42X1 a billable code?
Yes. O31.42X1 is a billable/specific code that can be used to indicate a diagnosis for reimbursement purposes.
What category does O31.42X1 belong to?
It belongs to category O31 – Complications specific to multiple gestation.
Source: CDC/NCHS ICD-10-CM FY2027 code files, tabular list and index. Reference only – code assignment must follow the official ICD-10-CM guidelines and documentation in the medical record.