No. There are a number of types so you’ll need to look at the details and find a policy which best suits your needs. For example, varying illnesses may be covered differently by certain providers - so make sure you check what’s covered. It is also important to know the details of what the claim process is after diagnosis and how payments will relate in those circumstances.
You may very well find that your policy pays out different amounts depending on the type of condition, so it’s important to make sure you are fully aware of your policy cover in advance.
Some policies have optional extras such as ‘child critical Illness cover’, ‘total permanent disability cover’ and ‘total disability cover’, so check the terms carefully if you seek wider coverage.