O31.8X2
Other complications specific to multiple gestation, second trimester
O31.8X2 is a non-billable ICD-10-CM code header for other complications specific to multiple gestation, second trimester. Report a more specific code from it instead. It is part of the FY2027 code set, effective October 1, 2026. A 7th character is required to complete the code. Its coding notes include a Use additional code instruction, 1 Excludes1 entry and 7 Excludes2 entries.
7th character
Category O31 requires a 7th character.
Guidelines tip
From the FY2027 Official Guidelines. ICD10Ref adds no rules of its own.
The trimester character comes from the provider's documentation for the current encounter. The unspecified trimester code should rarely be used.
Use additional code
Add the listed code as a secondary code, if known.
Also from chapter/block level (1 note)
- code, if applicable, from category Z3A, Weeks of gestation, to identify the specific week of the pregnancy, if known.
Excludes1
Not coded here. The listed conditions generally should not be reported together.
Also from chapter/block level (1 note)
- supervision of normal pregnancy (Z34.-)
Excludes2
Not included here. Both codes may be reported if the patient has both conditions.
Also from chapter/block level (4 notes)
Notes
Also from chapter/block level (6 notes)
- CODES FROM THIS CHAPTER ARE FOR USE ONLY ON MATERNAL RECORDS, NEVER ON NEWBORN RECORDS
- Codes from this chapter are for use for conditions related to or aggravated by the pregnancy, childbirth, or by the puerperium (maternal causes or obstetric causes)
- Trimesters are counted from the first day of the last menstrual period. They are defined as follows:
- 1st trimester- less than 14 weeks 0 days
- 2nd trimester- 14 weeks 0 days to less than 28 weeks 0 days
- 3rd trimester- 28 weeks 0 days until delivery
7th-character codes under O31.8X2 7
- O31.8X20Other complications specific to multiple gestation, second trimester, not applicable or unspecifiedBillable
- O31.8X21Other complications specific to multiple gestation, second trimester, fetus 1Billable
- O31.8X22Other complications specific to multiple gestation, second trimester, fetus 2Billable
- O31.8X23Other complications specific to multiple gestation, second trimester, fetus 3Billable
- O31.8X24Other complications specific to multiple gestation, second trimester, fetus 4Billable
- O31.8X25Other complications specific to multiple gestation, second trimester, fetus 5Billable
- O31.8X29Other complications specific to multiple gestation, second trimester, other fetusBillable