ICD-10-CM 2027 diagnosis code
O30.0Twin pregnancy
O30.0 is a header code, so it can't be reported by itself. Choose one of the 6 more specific codes beneath it.
Code unchanged since ICD-10-CM took effect on October 1, 2015. Source: official FY2027 ICD-10-CM release from CDC/NCHS and CMS. Page updated September 29, 2026. About our data
About O30.0
O30.0 is the ICD-10-CM diagnosis code for twin pregnancy. It belongs to category O30 (multiple gestation), block O30-O48 (maternal care related to the fetus and amniotic cavity and possible delivery problems) and chapter 15 (pregnancy, childbirth and the puerperium). It is a header code, so it can't be reported by itself; one of its 6 subcodes must be used instead.
Within O30 (multiple gestation), O30.0 is specifically for twin pregnancy. Related codes cover triplet pregnancy (O30.1), Quadruplet pregnancy (O30.2), other specified multiple gestation (O30.8) and unspecified (O30.9).
To report this condition, pick the subcode that matches the documentation: O30.00 (unspecified number of placenta and unspecified number of amniotic sacs), O30.01 (monochorionic/monoamniotic), O30.02 (pregnancy), O30.03 (monochorionic/diamniotic), O30.04 (dichorionic/diamniotic) and O30.09 (unable to determine number of placenta and number of amniotic sacs).
It has been part of ICD-10-CM since the code set took effect on October 1, 2015 and hasn't changed since.
Specific codes under O30.0
- O30.00Twin pregnancy, unspecified number of placenta and unspecified number of amniotic sacs
- O30.001Twin pregnancy, unspecified number of placenta and unspecified number of amniotic sacs, first trimesterBillable
- O30.002Twin pregnancy, unspecified number of placenta and unspecified number of amniotic sacs, second trimesterBillable
- O30.003Twin pregnancy, unspecified number of placenta and unspecified number of amniotic sacs, third trimesterBillable
- O30.009Twin pregnancy, unspecified number of placenta and unspecified number of amniotic sacs, unspecified trimesterBillable
- O30.01Twin pregnancy, monochorionic/monoamniotic
- O30.011Twin pregnancy, monochorionic/monoamniotic, first trimesterBillable
- O30.012Twin pregnancy, monochorionic/monoamniotic, second trimesterBillable
- O30.013Twin pregnancy, monochorionic/monoamniotic, third trimesterBillable
- O30.019Twin pregnancy, monochorionic/monoamniotic, unspecified trimesterBillable
- O30.02Conjoined twin pregnancy
- O30.03Twin pregnancy, monochorionic/diamniotic
- O30.04Twin pregnancy, dichorionic/diamniotic
- O30.09Twin pregnancy, unable to determine number of placenta and number of amniotic sacs
- O30.091Twin pregnancy, unable to determine number of placenta and number of amniotic sacs, first trimesterBillable
- O30.092Twin pregnancy, unable to determine number of placenta and number of amniotic sacs, second trimesterBillable
- O30.093Twin pregnancy, unable to determine number of placenta and number of amniotic sacs, third trimesterBillable
- O30.099Twin pregnancy, unable to determine number of placenta and number of amniotic sacs, unspecified trimesterBillable
Notes that apply from higher levels
Instructions written at a parent level also apply to O30.0.
› From O30 Multiple gestation
- any complications specific to multiple gestation
Broader instructions also apply from Chapter 15: Pregnancy, childbirth and the puerperium.
Code history
- 2016
- 2017
- 2018
- 2019
- 2020
- 2021
- 2022
- 2023
- 2024
- 2025
- 2026
- 2027
- FY2016 (effective 10/1/2015): Added (first year of ICD-10-CM)
- No changes since FY2016.
Common questions about O30.0
Is O30.0 billable?
- No. O30.0 is a header code. Report one of its more specific subcodes instead.