Special exception items. Specified items of equipment may be covered under certain conditions even though they do not meet the definition of DME because they are not primarily and customarily used to serve a medical purpose and/or are generally useful in the absence of illness or injury.
1 Physical Map: A physical map is one that shows the physical landscape features of a place. 2  They generally show things like mountains, rivers and lakes and water is always shown with blue. 3  Mountains and elevation changes are usually shown with different colors and shades to show relief. Topographic Map: A topographic map is similar to a physical map in that it shows different physical landscape features. 2  They are different however because they use contour lines instead of colors to show changes in the landscape.
A physical map of a chromosome or a genome that shows the physical locations of genes and other DNA sequences of interest.