O31.42 — Continuing pregnancy after vanishing twin syndrome of one fetus or more, second trimester
Is O31.42 billable?
No — O31.42 is a non-billable header code. O31.42 groups more specific codes and cannot be submitted on a claim. A valid ICD-10-CM code must be reported at the highest level of specificity available in its branch. Select one of the 7 billable codes beneath O31.42.
Billable codes under this header
- O31.42X0Continuing pregnancy after vanishing twin syndrome of one fetus or more, second trimester, not applicable or unspecified
- O31.42X1Continuing pregnancy after vanishing twin syndrome of one fetus or more, second trimester, fetus 1
- O31.42X2Continuing pregnancy after vanishing twin syndrome of one fetus or more, second trimester, fetus 2
- O31.42X3Continuing pregnancy after vanishing twin syndrome of one fetus or more, second trimester, fetus 3
- O31.42X4Continuing pregnancy after vanishing twin syndrome of one fetus or more, second trimester, fetus 4
- O31.42X5Continuing pregnancy after vanishing twin syndrome of one fetus or more, second trimester, fetus 5
- O31.42X9Continuing pregnancy after vanishing twin syndrome of one fetus or more, second trimester, other fetus
O31.42 at a glance
| Code | O31.42 |
|---|---|
| Description | Continuing pregnancy after vanishing twin syndrome of one fetus or more, second trimester |
| Billable | No — header code |
| Code set | ICD-10-CM FY2027 |
| Valid for encounters | October 1, 2026 – September 30, 2027 |
How is O31.42 listed in the Alphabetic Index?
The Alphabetic Index lists these routes under O31.4, the nearest indexed parent of O31.42. Use them to find the family, then select the specific code.
- Syndrome › vanishing twin of one fetus or more
- Pregnancy › continuing following › vanishing twin syndrome of one fetus or more (single) (uterine)
Excludes1 — never code together — inherited from Chapter 15
The conditions below can never be reported together with O31.42 on the same claim. An Excludes1 note means the two conditions cannot occur in the same patient, so reporting both is a coding error.
- supervision of normal pregnancy (Z34.-)
Use additional code — inherited from Chapter 15
Report an additional code alongside O31.42 to fully describe the condition. O31.42 is sequenced first.
- code, if applicable, from category Z3A, Weeks of gestation, to identify the specific week of the pregnancy, if known.
Excludes2 — not included here — inherited from Chapter 15
The conditions below are not part of O31.42, but a patient may have both at the same time. When documentation supports it, O31.42 and the excluded code may both be reported.
Excludes2 — not included here — inherited from O31
The conditions below are not part of O31.42, but a patient may have both at the same time. When documentation supports it, O31.42 and the excluded code may both be reported.
What codes fall under O31.42? (7)
- O31.42X0Continuing pregnancy after vanishing twin syndrome of one fetus or more, second trimester, not applicable or unspecified
- O31.42X1Continuing pregnancy after vanishing twin syndrome of one fetus or more, second trimester, fetus 1
- O31.42X2Continuing pregnancy after vanishing twin syndrome of one fetus or more, second trimester, fetus 2
- O31.42X3Continuing pregnancy after vanishing twin syndrome of one fetus or more, second trimester, fetus 3
- O31.42X4Continuing pregnancy after vanishing twin syndrome of one fetus or more, second trimester, fetus 4
- O31.42X5Continuing pregnancy after vanishing twin syndrome of one fetus or more, second trimester, fetus 5
- O31.42X9Continuing pregnancy after vanishing twin syndrome of one fetus or more, second trimester, other fetus
What other codes are in the O31.4 family? (3)
- O31.40Continuing pregnancy after vanishing twin syndrome of one fetus or more, unspecified trimesternot billable
- O31.41Continuing pregnancy after vanishing twin syndrome of one fetus or more, first trimesternot billable
- O31.43Continuing pregnancy after vanishing twin syndrome of one fetus or more, third trimesternot billable