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.
Species classification: a binomial nomenclature. In the 18th century, naturalist Carl Linnaeus invented a system for classifying all living species and defining their relationship to one another. In this system, each species belongs to a âgenusâ, a âfamilyâ, an âorderâ, a âclassâ a âbranchâ and a âkingdomâ. Even though it has gone through several modifications, the Linnaean system is still used by most scientists today.