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v1.0.0
ICD-10 Guide
DiagnosesPregnancy Induced Hypertension

Pregnancy Induced Hypertension

ICD-10 Coding for Pregnancy-Induced Hypertension(O13.1, O14.0)

PRIMARY SPECIALTYObstetrics
COMPLEXITYHigh
LAST UPDATED09/15/2025
Sam Tuffun, PT, DPT
Physical Therapist | Medical Coding & Billing Contributor

Diagnosis Overview

What is Pregnancy Induced Hypertension?
Essential facts and insights about Pregnancy-Induced Hypertension

Key Clinical Considerations:

  • Elevated blood pressure (systolic ≥ 140 mmHg or diastolic ≥ 90 mmHg) after 20 weeks of gestation
  • Proteinuria (≥ 300 mg in 24-hour urine collection or protein/creatinine ratio ≥ 0.3)
  • Symptoms such as headaches, visual disturbances, or upper abdominal pain

Clinical Information

Clinical Criteria & Documentation Requirements

  • Patient's blood pressure readings and gestational age at diagnosis
  • Use of terms like 'gestational hypertension' or 'preeclampsia' as applicable
  • Examples: 'Patient presents with hypertension at 28 weeks gestation with proteinuria.'

Coding Guidelines

Usage Guidelines & Examples

  • Usage guidelines: Differentiate between gestational hypertension and preeclampsia based on symptoms and lab findings.
  • Common errors: Misclassifying gestational hypertension as chronic hypertension.

Code Exclusions

Important Exclusions

  • Chronic hypertension (O10-O11)
  • Hypertensive disorders not related to pregnancy

Related ICD-10 Codes

Primary Codes
O13
Gestational hypertension without significant proteinuria
O14
Preeclampsia
Ancillary Codes
Z3A.XX
Differential Codes
O14.0
O13.1

Related CPT Codes

CPT codes will be available in a future update.

Specialty Focus

Primary Specialty

Obstetrics

Specialty Applications

  • Pregnant women, particularly those in their second and third trimesters
  • Obstetric clinics, hospitals, and prenatal care settings

Coding Complexity

High Complexity

This diagnosis requires careful attention to:

  • Comprehensive clinical documentation
  • Accurate code selection based on clinical criteria
  • Proper exclusion considerations
  • Specialty-specific coding guidelines

Documentation

Documentation Templates

Billing Information

Billing Considerations

  • Ensure proper documentation for billing
  • Verify code specificity requirements
  • Check for any additional codes needed
  • Review payer-specific guidelines

Common Issues

  • Insufficient clinical documentation
  • Incorrect code selection
  • Missing supporting diagnoses
  • Timing and frequency documentation

Frequently Asked Questions

Documentation requirements?

Document blood pressure readings, gestational age, and any symptoms.

Billing considerations?

Ensure accurate coding based on severity and associated conditions.