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ICD-10-CM 2027 diagnosis code

O30.03Twin pregnancy, monochorionic/diamniotic

Not billable — use a more specific code

O30.03 is a header code, so it can't be reported by itself. Choose one of the 4 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 O30.03

O30.03 is the ICD-10-CM diagnosis code for twin pregnancy, monochorionic/diamniotic. 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 4 subcodes must be used instead.

Within O30.0 (twin pregnancy), O30.03 is specifically for twin pregnancy, monochorionic/diamniotic. Related codes cover unspecified number of placenta and unspecified number of amniotic sacs (O30.00), monochorionic/monoamniotic (O30.01), conjoined twin pregnancy (O30.02), dichorionic/diamniotic (O30.04) and unable to determine number of placenta and number of amniotic sacs (O30.09).

To report this condition, pick the subcode that matches the documentation: O30.031 (first trimester), O30.032 (second trimester), O30.033 (third trimester) and O30.039 (unspecified trimester).

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 O30.03

Coding notes

Applicable toConditions and synonyms classified to this code
  • Twin pregnancy, one placenta, two amniotic sacs

Notes that apply from higher levels

Instructions written at a parent level also apply to O30.03.

› From O30 Multiple gestation
Code also
  • any complications specific to multiple gestation

Broader instructions also apply from Chapter 15: Pregnancy, childbirth and the puerperium.

Alphabetic index entries

1 entries

Terms in the official ICD-10-CM index that lead to O30.03.

Code history

  1. 2016
  2. 2017
  3. 2018
  4. 2019
  5. 2020
  6. 2021
  7. 2022
  8. 2023
  9. 2024
  10. 2025
  11. 2026
  12. 2027
  • FY2016 (effective 10/1/2015): Added (first year of ICD-10-CM)
  • No changes since FY2016.

Common questions about O30.03

Is O30.03 billable?

No. O30.03 is a header code. Report one of its more specific subcodes instead.