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IDC-10 modifiers

instructional notations

includes the word "includes" appears immediately under certain categories to further define, or give examples of, the content of the category
excludes1 an excludes1 note indicates that the code excluded should never be used at the same time as the code above the excludes1 note.
excludes2 indicates that the condition excluded is not part of the condition it is excluded from but a patient may have both conditions at the same time. acceptable to use both the code and the excluded codes together
use additional the words indicate an instructional note that another code may be needed
code first the words indicate an instructional note that directs the coder to sequence the underlying condition before the manifestation
code also instructs that two codes may be required to fully describe a condition
unspecified indicates that although the code is valid as a principal diagnosis, it is not as specific as other codes without the highlight
Created by: Mika42016