British Pediatric Association Classification of Diseases

The British Pediatric Association Classification of Diseases is a system of diagnostic codes used for pediatrics.
An extension to ICD-9 was published in 1979.
An extension to ICD-10 has also been published.
It is the basis for the U.S. Centers for [Disease Control and Prevention]'s six digit codes for reportable congenital conditions. These are also known as the "CDC/BPA codes". This system is in turn is the basis for the Texas Disease Index.