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v1.0.0
ICD-10 Guide
DiagnosesUncontrolled High Blood Pressure

Uncontrolled High Blood Pressure

ICD-10 Coding for Uncontrolled High Blood Pressure(I10, I16.0)

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

Diagnosis Overview

What is Uncontrolled High Blood Pressure?
Essential facts and insights about Uncontrolled High Blood Pressure

Key Clinical Considerations:

  • Systolic blood pressure consistently above 180 mmHg or diastolic above 120 mmHg
  • Symptoms may include headaches, shortness of breath, or nosebleeds
  • Elevated blood pressure readings during physical examination

Clinical Information

Clinical Criteria & Documentation Requirements

  • Document patient's blood pressure readings and symptoms
  • Use specific terms like 'uncontrolled hypertension' or 'hypertensive crisis'
  • Examples include noting the date, time, and context of blood pressure readings

Coding Guidelines

Usage Guidelines & Examples

  • Follow guidelines for differentiating between controlled and uncontrolled hypertension.
  • Common errors include misclassifying the severity of hypertension.

Code Exclusions

Important Exclusions

  • Secondary hypertension due to underlying conditions
  • Codes for controlled hypertension

Related ICD-10 Codes

Primary Codes
I10
Essential (primary) hypertension
I13.0
Hypertensive heart AND chronic kidney disease
I16.0
Hypertensive crisis
Ancillary Codes
R03.0
Differential Codes
I11.0
I16.1

Related CPT Codes

CPT codes will be available in a future update.

Specialty Focus

Primary Specialty

Primary Care

Specialty Applications

  • Adults with a history of hypertension
  • Primary care settings, emergency departments, and outpatient clinics

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?

Include detailed blood pressure readings and any associated symptoms.

Billing considerations?

Ensure accurate coding to reflect the severity and management of the condition.