ICD-10-CM 2027 diagnosis code
O15.0Eclampsia complicating pregnancy
O15.0 is a header code, so it can't be reported by itself. Choose one of the 3 more specific codes beneath it.
Code last changed in FY2017 (effective October 1, 2016). Source: official FY2027 ICD-10-CM release from CDC/NCHS and CMS. Page updated September 29, 2026. About our data
About O15.0
O15.0 is the ICD-10-CM diagnosis code for eclampsia complicating pregnancy. It belongs to category O15 (eclampsia), block O10-O16 (edema, proteinuria and hypertensive disorders in pregnancy, childbirth and the puerperium) and chapter 15 (pregnancy, childbirth and the puerperium). It is a header code, so it can't be reported by itself; one of its 3 subcodes must be used instead.
Within O15 (eclampsia), O15.0 is specifically for eclampsia complicating pregnancy. Related codes cover complicating labor (O15.1), complicating the puerperium (O15.2) and unspecified as to time period (O15.9).
To report this condition, pick the subcode that matches the documentation: O15.00 (unspecified trimester), O15.02 (second trimester) and O15.03 (third trimester).
It has been part of ICD-10-CM since the code set took effect on October 1, 2015, and changed in FY2017 (title revised).
Specific codes under O15.0
Notes that apply from higher levels
Instructions written at a parent level also apply to O15.0.
› From O15 Eclampsia
Broader instructions also apply from Chapter 15: Pregnancy, childbirth and the puerperium.
Alphabetic index entries
1 entriesTerms in the official ICD-10-CM index that lead to O15.0.
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)
- FY2017 (effective 10/1/2016): Title revised — was “Eclampsia in pregnancy”
Common questions about O15.0
Is O15.0 billable?
- No. O15.0 is a header code. Report one of its more specific subcodes instead.