Section II. CONVENTIONS AND TERMINOLOGY
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.
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.
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
Excludes: mycotic mycetoma (117.4)
c. NOTE. Found throughout the ICD-9-CM manuals (all volumes), and directs
the coder toward specific classification assignments.
Note--Use the following fifth-digit
subclassification with category 574:
0 without mention of obstruction
1 with obstruction
with cholecystitis (chronic) 574.4