ICD-10-CM 2027 diagnosis code
O12.1Gestational proteinuria
O12.1 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 O12.1
O12.1 is the ICD-10-CM diagnosis code for gestational proteinuria. It belongs to category O12 (gestational [pregnancy-induced] edema and proteinuria without hypertension), 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 6 subcodes must be used instead.
Within O12 (gestational [pregnancy-induced] edema and proteinuria without hypertension), O12.1 is specifically for gestational proteinuria. Related codes cover edema (O12.0) and edema with proteinuria (O12.2).
To report this condition, pick the subcode that matches the documentation: O12.10 (unspecified trimester), O12.11 (first trimester), O12.12 (second trimester), O12.13 (third trimester), O12.14 (complicating childbirth) and O12.15 (complicating the puerperium).
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 O12.1
- O12.10Gestational proteinuria, unspecified trimesterBillable
- O12.11Gestational proteinuria, first trimesterBillable
- O12.12Gestational proteinuria, second trimesterBillable
- O12.13Gestational proteinuria, third trimesterBillable
- O12.14Gestational proteinuria, complicating childbirthBillable
- O12.15Gestational proteinuria, complicating the puerperiumBillable
Notes that apply from higher levels
Instructions written at a parent level also apply to O12.1.
Broader instructions also apply from Chapter 15: Pregnancy, childbirth and the puerperium.
Alphabetic index entries
3 entriesTerms in the official ICD-10-CM index that lead to O12.1.
Codes whose notes reference O12.1
- R80Excludes1
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 O12.1
Is O12.1 billable?
- No. O12.1 is a header code. Report one of its more specific subcodes instead.