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.
ICN Online is based upon a common system of product classification known as the Harmonised System (HS). Agreed by the World Customs Organisation (WCO), it is used by virtually all countries of the World. The numerical system starts with very broad groupings (known as Sections) of products as an entry point. These groups divide into 2 digit breakdowns (known as Chapters) consisting of 97 broad product categories.