Gestational Hypertension ICD-10-CM Codes

Read this short guide to learn about gestational hypertension ICD codes you can use!

By Wynona Jugueta on Jun 23, 2025.

Fact Checked by Karina Jimenea.

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Gestational Hypertension ICD-10-CM Codes

What are Gestational Hypertension ICD-10-CM Codes?

The general code for gestational hypertension is O13. This code is used for pregnant women with elevated blood pressure (>140/90 mm Hg) on at least two occasions. This form of gestational pregnancy induced hypertension is categorized under the ICD-10 system for accurate diagnosis and billing.

If you're looking for gestational hypertension ICD codes, here are six that you can use:

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

This ICD-10 code is meant to be used on female patients confirmed to have gestational hypertension during the first trimester of their pregnancy. Their gestational hypertension is not accompanied by significant proteinuria (elevated protein levels in urine). This falls under gestational hypertension icd 10 classification and is managed by monitoring blood pressure and possible gestational diabetes mellitus risk.

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

This code is used when hypertension develops during the second trimester of pregnancy, and there is no significant proteinuria. It represents pregnancy induced hypertension without complications like moderate pre eclampsia or pre existing hypertension.

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

This code is used when hypertension develops during the third trimester of pregnancy, with high blood pressure but without significant proteinuria complicating the condition. This is common in patients not exhibiting severe pre or gestational edema with proteinuria.

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

This ICD-10 code is meant to be used on a female patient with gestational hypertension that's complicating childbirth. It is when induced hypertension without significant proteinuria disrupts normal delivery, often requiring close monitoring and possibly treatment with anti-hypertensive medication.

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

This ICD-10 code is meant to be used on a female patient confirmed to have gestational hypertension that complicates the puerperium (the period when the reproductive organs return to normal post-childbirth). Their gestational hypertension is not accompanied by significant proteinuria, but proteinuria complicating the puerperium can develop in more severe cases. This should not be confused with pre existing secondary hypertension.

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

This ICD-10 code is used when the trimester is unspecified or undocumented, typically for pregnancy induced hypertension arising after 20 weeks gestation without significant proteinuria, complicating childbirth and the puerperium. It may coexist with gestational edema and is sometimes documented with unspecified pre or pre existing hypertensive conditions.

Are these gestational hypertension ICD-10 codes billable?

Yes. All six of these ICD-10 codes for gestational hypertension are valid and billable under ICD 10 CM standards.

Clinical information about gestational hypertension

Gestational hypertension is a type of high blood pressure that occurs because of pregnancy, usually during the second trimester (20 weeks), though it can emerge during the first and third trimester as well. This form of hypertension complicating pregnancy is closely monitored by healthcare professionals.

This kind of transient hypertension only happens if the pregnant woman doesn't have proteinuria, other kidney problems, or heart issues. If a pregnant woman has a blood pressure of 140/90 mmHg or higher due to their pregnancy, they will be diagnosed with gestational hypertension.

Healthcare professionals handling pregnant women will administer medication when appropriate. In more complex scenarios, conditions like mild to moderate pre eclampsia and pre existing secondary hypertension may need to be ruled out or addressed.

Synonyms include:

  • Hypertension during pregnancy
  • Pregnancy-induced hypertension
  • Hypertension during pregnancy without significant proteinuria
  • Hypertension during pregnancy, first trimester
  • Hypertension during pregnancy, second trimester
  • Hypertension during pregnancy, third trimester

Popular search terms for gestational hypertension

  • Gestational hypertension ICD 10
  • ICD 10 code for gestational hypertension
  • ICD 10 gestational hypertension
  • History of gestational hypertension ICD 10
  • ICD 10 code for gestational hypertension third trimester

Frequently asked questions

What are the symptoms of someone who has gestational hypertension?

They will likely have headaches, vision problems, and swelling.

What are the risks of gestational hypertension?

If gestational hypertension is left unchecked and unmanaged, the pregnant woman is at risk of preeclampsia, a dangerous condition characterized by extremely high blood pressure and organ damage.

Is gestational hypertension dangerous to the baby as well?

Yes. Gestational hypertension will impact the blood flowing into the placenta, negatively affecting the baby’s growth and well-being. It might even lead to pre-term birth.

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