2026 ICD-10-CM Diagnosis Code O13Gestational [pregnancy-induced] hypertension without significant proteinuria

ICD-10-CM Codes›O00-O9A›O10-O16›O13

ICD-10-CM O13
CMSSource: CMS FY 2026 ICD-10-CM dataset · Effective Oct 1, 2025 – Sep 30, 2026

O13 is a non-billable ICD-10-CM category code for gestational [pregnancy-induced] hypertension without significant proteinuria, so it cannot be submitted on claims. Use a more specific code from this category instead, such as O13.1, O13.2, O13.3, and O13.4.

Code Identity

ICD-10-CM Code
O13
Billable Status
No — Non-Billable Category
Code Describes
Gestational [pregnancy-induced] hypertension without significant proteinuria
Chapter
O10-O16
Edema, proteinuria and hypertensive disorders in pregnancy, childbirth and the puerperium

Code Classification

ChapterO00-O9APregnancy, childbirth and the puerperium
SectionO10-O16Edema, proteinuria and hypertensive disorders in pregnancy, childbirth and the puerperium
CategoryO13Gestational [pregnancy-induced] hypertension without significant proteinuria
This CodeO13Gestational [pregnancy-induced] hypertension without significant proteinuria

Specific Coding for Gestational hypertension without significant proteinuriaOverview

Non-specific codes like O13 require more characters. Use one of these billable codes instead:

  • Use O13.1 for Gestational [pregnancy-induced] hypertension without significant proteinuria, first trimester

  • Use O13.2 for Gestational [pregnancy-induced] hypertension without significant proteinuria, second trimester

  • Use O13.3 for Gestational [pregnancy-induced] hypertension without significant proteinuria, third trimester

  • Use O13.4 for Gestational [pregnancy-induced] hypertension without significant proteinuria, complicating childbirth

  • Use O13.5 for Gestational [pregnancy-induced] hypertension without significant proteinuria, complicating the puerperium

  • Use O13.9 for Gestational [pregnancy-induced] hypertension without significant proteinuria, unspecified trimester

Tabular List NotesGuidance

Coding notes and annotation back-references applicable to this code.

Includes

  • gestational hypertension NOS
  • transient hypertension of pregnancy

Patient EducationClinical

High Blood Pressure in Pregnancy

Blood pressure is the force of your blood pushing against the walls of your arteries. Your arteries are blood vessels that carry blood from your heart to other parts of your body. High blood pressure, or hypertension, is blood pressure that is higher than normal.

The full article covers:

  • What is high blood pressure in pregnancy?
  • What are the types of high blood pressure in pregnancy?
  • Who is more likely to develop high blood pressure in pregnancy?
  • What are the symptoms of high blood pressure in pregnancy?
  • What problems can high blood pressure in pregnancy cause?
  • How is high blood pressure in pregnancy diagnosed?
  • What are the treatments for high blood pressure in pregnancy?

Read the full article at MedlinePlus

Courtesy of MedlinePlus, a service of the U.S. National Library of Medicine.

Code HistoryHistory

FY 2016AddedAdded to the ICD-10-CM code setEffective October 1, 2015, the first year of ICD-10-CM.
FY 2017–2025No changes
FY 2026CurrentCurrent code set, no changesEffective October 1, 2025 through September 30, 2026.

Questions About O13Overview

Is O13 a billable code?

No. This is a category header that groups the codes for gestational [pregnancy-induced] hypertension without significant proteinuria, and headers cannot be submitted on claims. Claims for gestational [pregnancy-induced] hypertension without significant proteinuria need a more specific code from this category, such as O13.1, O13.2, and O13.3.