1 Know what a set and an element are. 2  Write a mathematical statement with an equal sign or an inequality.  Identify what numbers belong to the set of natural numbers, whole numbers, integers, rational numbers, irrational numbers, and real numbers.
Discogenic spondylosis, which is often thought of as a form of spinal osteoarthritis, refers to a degenerative condition that affects the joints of the spine.
Spondylosis is a general term for degenerative changes of the spine due to osteoarthritis. The ICD-9 codes for spondylosis are the 721.0-721.42 series. The code selection is based upon the location of the condition and whether or not myelopathy is present.