Official websites use .gov
A
.gov website belongs to an official
government organization in the United States.
Secure .gov websites use HTTPS
A lock (
) or https:// means you've safely
connected to the .gov website. Share sensitive
information only on official, secure websites.
Disease codes and categories hierarchical relationship. This is a snap shot of the hierarchical relationship between the diseases and disease categories. For instance, disease category 49 (diabetes) has a children that are represented in disease codes (ICD-9-CM).
