Human immunodeficiency virus [HIV] disease. 1  B20 is a billable/specific ICD-10-CM code that can be used to indicate a diagnosis for reimbursement purposes. 2  Reimbursement claims with a date of service on or after Oct 1, 2015 require the use of ICD-10-CM codes.  This is the American ICD-10-CM version of B20.
The process of naming and classifying organisms according to set of rules is called taxonomy. In some cultures, taxonomic rules are based traditional uses for plants and animals, and the existence of classification system facilities the transfer of that knowledge through generations.ummary. Modern taxonomy officially began in 1758 with Systema Naturae, the classic work by Carolus Linnaeus. This module, the first in a two-part series on species taxonomy, focuses on Linnaeusâ system for classifying and naming plants and animals.
Prior to the adoption of the modern binomial system of naming species, a scientific name consisted of a generic name combined with a specific name that was from one to several words long. Together they formed a system of polynomial nomenclature.axonomy includes both nomenclature and classification. Its first stages (sometimes called  alpha taxonomy ) are concerned with finding, describing and naming species of living or fossil organisms. Binomial nomenclature is thus an important part of taxonomy as it is the system by which species are named.