By Michael Perry, M.D. Foraminal narrowing, or foraminal stenosis, is a condition of the spine that can cause pain and other symptoms resulting from spinal nerve root compression. At every level of the spine, a pair of nerve roots runs through the spinal column via small openings called foramina (singular: foramen).
When claims are entered into the Medicare system, they are issued a tracking number known as the internal control number (âICNâ). The ICN is a 13-digit number assigned to each claim received by Medicare. The significance of the digits is as follows: 1  Digits 1-2: Indicate how the claim was submitted (electronically or via paper). 2  Digits 3-4: Indicate the calendar year in which the claim was received.
A logical unit number is assigned when a host scans a SCSI device and discovers a logical unit. The LUN identifies the specific logical unit to the SCSI initiator when combined with information such as the target port identifier. Although the term LUN is only the identifying number of the logical unit, the industry commonly uses LUN as shorthand to refer to the logical unit itself.