Prevent ICD-10 ranges from entering codelists

Why are we doing this?

It is possible for a user to create an ICD-10 codelist that contains a range (e.g. E10-E14), however this causes a failure when you try and use the codelist.

As well as having descriptions for codes, ICD-10 also has descriptions for ranges, so E10-E14 has a description of "diabetes mellitus". Currently if a user does a code search for "E10-E14", or more likely "E*" or "E1*" then we return these "ranges". A user can "include" a range and successfully create a codelist, but it breaks when you try and use it.

How will we know when it's done?

Users can select a range, create a codelist, and use it without error.

What are we doing?

Given these ranges have a description, and that they logically group their descendants together, this seems like a good feature to keep as it makes it easier to create a codelist. So the suggested change is to ensure that if a user selects E10-E14, that it includes each sub code in the codelist (E10, E100, E101, E11, E12 etc), but does not include the code "E10-E14".

Defining delivery tasks guidance

Start by locating the code-search and codelist creation paths, then trace how ICD-10 ranges such as E10-E14 are selected and stored. Verify that selecting a range expands it to its descendant codes without storing the range itself, and confirm the resulting codelist can be used without error.