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O31.8X10

O31.8X10Other complications specific to multiple gestation, first trimester, not applicable or unspecified

Billable / specific codeICD-10-CM

O31.8X10 is a billable, specific ICD-10-CM code for other complications specific to multiple gestation, first trimester, not applicable or unspecified. It is valid for submission on a claim.

7th character "0" — not applicable or unspecified

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.

0
not applicable or unspecified
1
fetus 1
2
fetus 2
3
fetus 3
4
fetus 4
5
fetus 5
9
other fetus

Risk adjustment

O31.8X10 does not map to an HCC and does not risk-adjust under CMS-HCC V28. That is normal — most ICD-10 codes do not. It still needs to be coded correctly; it just will not move a RAF score.

Related codes at this level

Codes that share O31.8X1. If O31.8X10 is not quite right, the correct code is usually one of these.

Questions about O31.8X10

Is O31.8X10 a billable ICD-10-CM code?
Yes. O31.8X10 is a billable, specific ICD-10-CM code and is valid for submission on a claim.
Where does O31.8X10 sit in the tabular list?
Pregnancy, childbirth and the puerperium (O00-O9A), in the block Maternal care related to the fetus and amniotic cavity and possible delivery problems (O30-O48).
ICD-10-CMFY2026-Apr· effective April 1, 2026

Loaded directly from the CMS/NCHS ICD-10-CM public-domain release — see data sources and our editorial policy. If this page disagrees with the CMS tabular list, this page is wrong. Reference information for professional coders; not medical or billing advice.