ICD-9 stands for International Classification of Diseases (Version 9). These codes are used in diagnosis, in CPOE Lab and are required for billing.
ICD-10 are also in use by some clinics.
The choice of the Clinic at the Ordering stage is built into the system, so that he sees ICD-9 or ICD-10 codes as requested by him.
The user may occasionally add a new code, or delete a redundant code. He can also flag a code as inactive, so that it does not get used in any subsequent Patient Encounter.

Note that since these codes run into thousands, they are arranged in a hierarchy.

460-519 is an example of Dummy Code added so as to maintain the Hierarchy. For codes with One or Two places after decimal, the Parent is very obvious.

With so many interdependencies the User is unlikely to have a need to Edit / Add/ Delete Codes.

Code: This is mandatory and is applicable only while adding new codes. Existing codes that are already imported cannot be changed. In such a case one needs to delete the record and create a new one.

Name: It is mandatory to specify at least one of the three names given for the disease. The user name will be used to specify this ICD code in PrognoCis . Since the names are imported from the ICD database the user is allowed to change the name according to his nomenclature.