SNOMED CT® Release Format 1 (RF1) Guide - ihtsdo

Figure 41: Overview of Cross Map Schema
3.2.11.2. SNOMED CT to ICD-9-CM Epidemiological and Statistical Map
ICD-9-CM, the International Classification of Diseases 9th Revision Clinical Modification Version, is a coding
scheme sponsored by the National Center for Health Statistics (NCHS). It is used extensively in the United
States for reporting and tracking of mortality, statistical reporting of diseases as well as billing and
reimbursement processing. The SNOMED CT to ICD-9-CM cross-map is updated to reflect the version of
ICD-9-CM current as of the date of its release. It includes all the SNOMED CT Clinical Findings (disorders
and findings).
Note:
It is important to note that this mapping table is NOT intended for direct billing or reimbursement without
additional authoritative review.
Whenever possible, the ICD code or codes(s) with the highest level of specificity have been selected. Terms
that cannot be assigned to appropriate ICD-9-CM code or codes are considered unmappable. They are
denoted by a null in the Target Codes field and a zero in the MapAdvice field.
3.2.11.2.1. Mapping Categorization Methodology
The MapAdvice field in the Cross Maps table contains the categorization methodology that provides further
information about the characteristics of the map. The methodology is as follows:
Table 195: Mapping Categorization Methodology
Category
0
Description
Unmappable. SNOMED CT term cannot be assigned to an appropriate ICD-9-CM
code.
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