How can the Isabel Symptom Checker help you today?

Developed from the professional Isabel tool used by doctors worldwide, the free Isabel Symptom Checker can help you make sense of and research your symptoms.

I would like to:

Understand my symptoms

Get advice on:

Where to get care?
Why use Isabel?
Why use Isabel?

Why should you use Isabel?

1. Our symptom checker is quick and easy to use - enter as many symptoms as you like without the endless questions.

2. Use the one the doctors use. The Isabel professional tool has been used in leading hospitals worldwide since 2001.

3. The Isabel Symptom Checker is recognised worldwide for its accuracy covering both common and rare conditions.

Are you an institution looking for a patient symptom checker?

Isabel makes its APIs available so that you can build the Isabel Symptom Checker into your own system.

If you are a medical institution, health information or telehealth company looking for a symptom checker, discover more through the Isabel Developers Program.

Are you a medical institution?

“ Impressive… and very, very fast ”


Michael Mosely, BBC One Show 18th January 2018

Wall Street Journal

A Better Online Diagnosis Before the Doctor visit

“After trying several online symptom-checkers, he found Isabel to be the most useful. He entered his radiating pain symptoms, and Isabel returned several possible diagnoses, flagging a slipped disk as a common possibility.…..He says he decided to visit an urgent-care center in April, bringing along his research from Isabel, and an MRI ordered there confirmed that he did indeed have a slipped disk...”

The Informed Patient, WSJ, Laura Landro July 22, 2013

Read more stories

Are you a looking for a tool to help clinicians with diagnosis?

You need the professional Isabel DDx Generator. Used by leading hospitals worldwide to support their clinicians in getting to the right diagnosis as fast as possible.

Isabel DDx Generator
Are you a medical institution?
Why use Isabel?

What makes Isabel so unique?

Unlike any other symptom checker, Isabel is unique in being able to handle even large and complex medical presentations using multiple AI and enhanced machine learning algorithms while remaining quick and easy to use.

It’s been crafted, tuned, tested and used by doctors around the world for almost 20 years.