For example, a certain maize variety grown in a cool climate will need less water per day than the same maize variety grown in a hotter climate. It is therefore useful to take a certain standard crop or reference crop and determine how much water this crop needs per day in the various climatic regions.
An implantable cardioverter defibrillator (ICD) looks very similar to a pacemaker, except that it is slightly larger. It has a generator, one or more leads, and an electrode for each lead. These components work very much like a pacemaker.
The relationship between ICD-9 (diagnosis) and CPT (procedural) Codes. The critical relationship between an ICD-9 code and a CPT code is that the diagnosis supports the medical necessity of the procedure. Since both ICD-9 and CPT are numeric codes, health care consulting firms, the government, and insurers have all designed software that compares the codes for a logical relationship.