| The coding instructions in the front of the book are being
rewritten, clarified, and made more user friendly.
Example 1.
Morphology terms have five-digit code numbers ranging from
8000/0 to 9989/1. The first four digits indicate the specific
histologic terms (Table 8).
The fifth digit, after the slash or solidus (/), is a behavior
code, which indicates whether a tumor is malignant, benign,
in situ or uncertain whether malignant or benign.
A separate one-digit code for histologic grading or differentiation
is provided
Example of Revised Wording
| OLD
WORDING |
|
NEW
WORDING |
| If a diagnosis indicates two
different degrees of grade or differentiation (e.g., "well
and poorly differentiated" or "grades II-III"), code to
the higher grade. |
|
Grading or differentiation
code: Assign the highest grade or differentiation code
described in the diagnostic statement.
|
|
