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Table 1 Classification of breast cancer according to the severity indicator (SI)

From: Indicators of breast cancer severity and appropriateness of surgery based on hospital administrative data in the Lazio Region, Italy

Categories

description

primary diagnosis

secondary diagnosis

  

ICD9 -CM codes

1

In situ tumors

233.0

-

2

Localized tumors

174.0 – 174.9

-

3

Non-localized tumors

174.0 – 174.9; 233.0

196

4

Metastatitc tumors

174.0 – 174.9; 233.0

197; 198