Isabel - The Symptom Checker doctors use and trust

Developed from the professional Isabel tool used by doctors worldwide, the Isabel Symptom Checker will help you work out what’s wrong with you and advise you where to go next.

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.

Dr Max prescribes... Isabel Online Symptom Checker

We've all turned to Dr Google for a diagnosis at some point. Too often, though, patients find themselves looking at unreliable sites. This free symptom checker uses Artificial Intelligence and is based on one favoured by doctors. It's simple to use, allows you to key in symptoms or worries and gives a comprehensive list of possible diagnoses with advice on where to go next and when to get urgent help.

- Daily Mail, Saturday, September 28th, 2019

Daily mail

Are you an institution looking for a patient symptom checker?

Isabel makes its APIs available for you to build the Isabel Symptom Checker into your system. If you don’t have developers on hand, you can make use of our browser version, with additional customizations, to make it look more like your 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 looking for a tool to help clinicians with clinical reasoning?

You need the professional Isabel DDx Generator. Used by leading hospitals worldwide to enhance their clinicians’ clinical reasoning skills.


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

Wall Street Journal
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.