D81
D81 is a designation used across multiple unrelated systems to label a specific entry or category. Because it appears in different contexts, its meaning cannot be inferred without domain information.
In medical coding, D81 is a code in ICD-10-CM used to classify immune system disorders. It sits
In transportation, D81 may appear as a road designation in certain countries that use a D-prefix for
In other domains, D81 can be used as a catalog or model identifier—found in product catalogs, library
See also: the broader uses of the D80–D89 coding range in ICD-10-CM and the general practice of