Assortment of procedure code numbers that belong to the same general category that appear in the “Index,” which is the last section of the annually published Current Procedural Terminology code book. Whenever more than one code applies to a given index entry, a code range is listed. If several nonsequential codes apply, they are separated by a comma:EsophagusReconstruction… … . 43300, 43310, 43313If two or more sequential codes apply, they are separated by a hyphen:DebridementBurns… … . . 01951-01953, 16010-16030