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ICD-10 Code O11.2: Pre-existing hypertension with pre-eclampsia, second trimester

O11.2 is a billable ICD-10 diagnosis code used to classify Pre-existing hypertension with pre-eclampsia, second trimester in medical records and claims. You may see this code in hospital records, discharge summaries, insurance claims, encounter documentation, referrals, or other healthcare billing and coding records. ICD-10 codes are diagnosis classification codes used in healthcare records, reporting, coding workflows, and billing support. This code sits within the broader ICD-10 area for Pregnancy, childbirth and the puerperium (O00-O9A).

Reviewed by HealthAssure Clinical TeamUpdated 26 May 2026

What is this code?

ICD-10 codes are diagnosis classification codes used in healthcare records, reporting, coding workflows, and billing support. This code sits within the broader ICD-10 area for Pregnancy, childbirth and the puerperium (O00-O9A).

When is it used?

  • May be used when a clinician documents pre-existing hypertension with pre-eclampsia, second trimester in a patient's medical record.
  • May appear in hospital records, claims, referrals, and clinical documentation.
  • This code can be used as a clinically usable diagnosis entry in standardized coding workflows.

What it does not mean

  • A code alone does not explain severity, treatment plan, or outcome.
  • A medical code should not be treated as a substitute for a doctor's diagnosis or advice.

Code hierarchy

chapter
15Pregnancy, childbirth and the puerperium (O00-O9A)
block
O10-O16Edema, proteinuria and hypertensive disorders in pregnancy, childbirth and the puerperium
category
O11Pre-existing hypertension with pre-eclampsia
currentO11

Where you may see this code

You may see this code in hospital records, discharge summaries, insurance claims, encounter documentation, referrals, or other healthcare billing and coding records.

Related specialists

ObstetricianGynecologistCardiologistMaternal-Fetal Medicine Specialist

Related tests

Urine protein assessment
May be reviewed when evaluating hypertensive disorders in pregnancy.
Serum creatinine
Often reviewed when assessing kidney involvement in hypertensive disorders of pregnancy.
Platelet count
May be relevant when monitoring pregnancy-related hypertension complications.
Liver function tests
May be reviewed when hypertensive disorders in pregnancy raise concern for maternal complications.

Related procedures

Obstetric ultrasound
Commonly part of fetal growth and pregnancy follow-up pathways in hypertensive disorders of pregnancy.
Fetal nonstress testing
May be used in selected higher-risk pregnancy monitoring pathways.
Biophysical profile
May appear in fetal surveillance pathways for higher-risk pregnancies.

Coding guidelines

Common synonyms

Pre-existing hypertension with pre-eclampsia, second trimester

Frequently asked questions

Code details

CodeO11.2
SystemICD10
Display namePre-existing hypertension with pre-eclampsia, second trimester
ChapterPregnancy, childbirth and the puerperium (O00-O9A)
BlockEdema, proteinuria and hypertensive disorders in pregnancy, childbirth and the puerperium

Flags

BillableYes
Valid clinical useYes

Source

SourceICD-10
Version2026-annual
Releaseannual
Year2026

About this content

This page is prepared by HealthAssure's clinical team using official coding standards from ICD-10. AI tools assist with drafting explanations, which are then reviewed and verified by healthcare professionals for accuracy. This content is for informational purposes and does not replace professional medical advice. Meet our team.

ICD-10 Code O11.2 for Pre-existing hypertension with pre-eclampsia, second trimester | HealthAssure