O31 Complications specific to multiple gestation

⚠ Non-Billable ICD-10-CM 2026
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The ICD-10-CM code for Complications specific to multiple gestation is O31 (FY2026). It is a non-billable category code — select a more specific code below for claims.

Classification

Section
O30-O48: Maternal care related to the fetus and amniotic cavity and possible delivery problems (O30-O48)
Category O31
27 codes (20 billable)
FY2026 Status
Stable since FY2024
Excludes2
Not included here. These conditions are coded elsewhere but may be coded together if applicable.
  • delayed delivery of second twin, triplet, etc. (O63.2)
  • malpresentation of one fetus or more (O32.9)
  • placental transfusion syndromes (O43.0-)

Official Coding Guidelines

7th character fetus identification; assign 0 in specified cases

6) 7th character for fetus identification Where applicable, a 7th character is to be assigned for certain categories (O31, O32, O33.3 - O33.6, O35, O36, O40, O41, O60.1, O60.2, O64, and O69) to identify the fetus for which the complication code applies. Assign 7th character “0”: • For single gestations • When the documentation in the record is insufficient to determine the fetus affected and it is not possible to obtain clarification. • When it is not possible to clinically determine which fetus is affected.

— ICD-10-CM Official Guidelines for Coding and Reporting, FY2026, Section I.C.15.a.6

Source: CMS — ICD-10-CM Official Guidelines for Coding and Reporting, FY2026

References

Related Codes

More Specific Codes

O31.0 Papyraceous fetus O31.00 Papyraceous fetus, unspecified trimester O31.01 Papyraceous fetus, first trimester O31.02 Papyraceous fetus, second trimester O31.03 Papyraceous fetus, third trimester O31.1 Continuing pregnancy after spontaneous abortion of one fetus or more O31.10 Continuing pregnancy after spontaneous abortion of one fetus or more, unspecified trimester O31.11 Continuing pregnancy after spontaneous abortion of one fetus or more, first trimester O31.12 Continuing pregnancy after spontaneous abortion of one fetus or more, second trimester O31.13 Continuing pregnancy after spontaneous abortion of one fetus or more, third trimester O31.2 Continuing pregnancy after intrauterine death of one fetus or more O31.20 Continuing pregnancy after intrauterine death of one fetus or more, unspecified trimester O31.21 Continuing pregnancy after intrauterine death of one fetus or more, first trimester O31.22 Continuing pregnancy after intrauterine death of one fetus or more, second trimester O31.23 Continuing pregnancy after intrauterine death of one fetus or more, third trimester O31.3 Continuing pregnancy after elective fetal reduction of one fetus or more O31.30 Continuing pregnancy after elective fetal reduction of one fetus or more, unspecified trimester O31.31 Continuing pregnancy after elective fetal reduction of one fetus or more, first trimester O31.32 Continuing pregnancy after elective fetal reduction of one fetus or more, second trimester O31.33 Continuing pregnancy after elective fetal reduction of one fetus or more, third trimester O31.8 Other complications specific to multiple gestation O31.8X Other complications specific to multiple gestation O31.8X1 Other complications specific to multiple gestation, first trimester O31.8X2 Other complications specific to multiple gestation, second trimester O31.8X3 Other complications specific to multiple gestation, third trimester O31.8X9 Other complications specific to multiple gestation, unspecified trimester

Related Codes in O31

O31.0 Papyraceous fetus O31.00 Papyraceous fetus, unspecified trimester O31.01 Papyraceous fetus, first trimester O31.02 Papyraceous fetus, second trimester O31.03 Papyraceous fetus, third trimester O31.1 Continuing pregnancy after spontaneous abortion of one fetus or more O31.10 Continuing pregnancy after spontaneous abortion of one fetus or more, unspecified trimester O31.11 Continuing pregnancy after spontaneous abortion of one fetus or more, first trimester O31.12 Continuing pregnancy after spontaneous abortion of one fetus or more, second trimester O31.13 Continuing pregnancy after spontaneous abortion of one fetus or more, third trimester O31.2 Continuing pregnancy after intrauterine death of one fetus or more O31.20 Continuing pregnancy after intrauterine death of one fetus or more, unspecified trimester O31.21 Continuing pregnancy after intrauterine death of one fetus or more, first trimester O31.22 Continuing pregnancy after intrauterine death of one fetus or more, second trimester O31.23 Continuing pregnancy after intrauterine death of one fetus or more, third trimester O31.3 Continuing pregnancy after elective fetal reduction of one fetus or more O31.30 Continuing pregnancy after elective fetal reduction of one fetus or more, unspecified trimester O31.31 Continuing pregnancy after elective fetal reduction of one fetus or more, first trimester O31.32 Continuing pregnancy after elective fetal reduction of one fetus or more, second trimester O31.33 Continuing pregnancy after elective fetal reduction of one fetus or more, third trimester
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Reviewed by Prajwal Shrestha, CPC, CRC
Certified Professional Coder (CPC) and Certified Risk Adjustment Coder (CRC) · AAPC Member ID 01997614 · About · Editorial policy · Content last reviewed: 2025-10-01

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