Section II. CONVENTIONS AND TERMINOLOGY
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GENERAL
The following paragraphs explain (and provide examples of) the signs, symbols,
abbreviations, and instructions you will encounter in using the ICD-9-CM. Most of this
information can also be found in the IPDS User's Manual.
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INSTRUCTIONAL TERMS
a. Inclusion Terms. These are secondary terms which indicate that the code
and title embrace these terms. Inclusion terms are not to be taken as all-inclusive, but
rather as an example of the terms included.
030 Leprosy
Includes: Hansen's disease
infection by Mycobacterium leprae
b. Exclusion Terms. These are secondary terms indicating that the
conditions/procedures are not included but may be found elsewhere. Exclusion terms
are always written in italics and the word excludes is written in italics and in a box.
EXAMPLE: 117.6 Allescheriosis [Petriellidosis]
Infections by Allescheria [Petriellidium] boydii
[Monosporium apiospermum]
Excludes: mycotic mycetoma (117.4)
c. NOTE. Found throughout the ICD-9-CM manuals (all volumes), and directs
the coder toward specific classification assignments.
EXAMPLE:
Choledocholithiasis 574.5
Note--Use the following fifth-digit
subclassification with category 574:
0 without mention of obstruction
1 with obstruction
with cholecystitis (chronic) 574.4
acute 574.3
MD0753
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