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--- documentation:vocabulary:icd9cm [2015/06/14 05:53] – cgreich
+++ documentation:vocabulary:icd9cm [2024/09/02 11:30] (current) – Depreciation of page and posting of corresponding link in Github wiki jcruz
@@ Line 1: / Line 1: @@
 ===== ICD9CM =====
+Thank you for visiting the wiki! This page has moved to https://github.com/OHDSI/Vocabulary-v5.0/wiki/Vocab.-ICD9CM.
-==== Overview ====
-ICD9CM is a coding system in the USA, which is based on the WHO ICD9 coding system, but contains multiple additions and modifications.
-==== Transformation =====
-The procedures for transforming Concepts from the source to the OMOP Standard Vocabularies can be found [[http://github.com/ohdsi/vocabulary_v5.0/ICD9CM|here]].
-==== Concept Names ====
-All Concepts are assigned the longest of all available names.
-==== Concept Code ====
-All ICD9CM codes are represented in the format containing the dot.
-==== Standard Concepts ====
-All ICD9CM codes are non-Standard.
-==== Concept Classes ====
-ICD9CM Concept Classes identify each Concept as part of the general coding scheme of diagnoses and disorders, the codes for health status and contact with health services (V codes, starting with the letter "V") and those for external causes of injury (E codes, starting with the letter "E"). In addition, the Concept Classes distinguish between billing and non-billing codes. These are defined according to the Health Care Services Coding System of the Centers of Medicare and Medicaid Services (CMS). Billing codes are those that are used for reimbursement of services, while non-billing codes are Chapter, Category or Sub Category codes.
-Please refer to [[http://www.ohdsi.org/web/athena/vocabcontent#ICD9CM|Concepts of ICD-9-CM]] for details of the composition of this vocabulary.
-^Concept Class^Notes^
-|3-dig billing V code| |
-|3-dig billing code| |
-|3-dig nonbill V code| |
-|3-dig nonbill code| |
-|4-dig billing E code|There are no 3-digit E codes|
-|4-dig billing V code| |
-|4-dig billing code| |
-|4-dig nonbill E code| |
-|4-dig nonbill V code| |
-|4-dig nonbill code| |
-|5-dig billing E code|There are no 5-digit codes that are non-billing|
-|5-dig billing V code| |
-|5-dig billing code| |
-|ICD9CM V code|Legacy class of deprecated Concepts|
-|ICD9CM code|Legacy class of deprecated Concepts|
-==== Domains ====
-For each ICD9CM Concept, the Domain is inferred from the SNOMED Concept it is mapped to. If it is mapped to more than one concept, a combination Domain is assigned.
-^Domain^Active^Deprecated^Description^
-|Condition|Bulk of ICD9CM codes|
-|Observation|2606|579| |
-|Procedure|330|314| |
-|Measurement|201|13| |
-|Meas/Procedure|0|22|Deprecated codes|
-|Condition/Meas|0|33|Deprecated codes|
-|Condition/Procedure|0|19|Deprecated codes|
-==== Relationships ====
-There are two types of relationships:
-  - Direct ICD9CM to SNOMED maps recorded as "Maps to" relationships. These are manually curated based on input from UMLS (connection through common CUIs) and through MedDRA through ICD9CM to MedDRA maps in combination to MedDRA to SNOMED maps (see there). Pre-coordinated Concepts are mapped, if possible, to their components. For example, .
-  - Maps for Concepts that do not represent entities at the time of recording. For example, Concepts for history of, family history of, need for vaccination, XXX etc. refer to observations that are made recorded at a certain time, but the medical entity they are referring to, such as the disease for which family history is recorded, belongs to a different point in time. These codes are mapped to SNOMED Observation Concepts using the "Maps to" relationship, and to the relevant medical entity to the "Maps to value" relationship.
-  - Hierarchical relationships between 3, 4 and 5-digit Concepts. These are constructed for those Concepts where the shorter code is entirely subsumed by longer one. Note that these relationships also exist between 3 and 5-digit codes according to these rules, which deviates from the preferred convention that "Subsumes" and "Is a" relationships only exist between directly related Concepts.
-==== Hierarchy ====
-ICD9CM Concepts are not Standard Concepts and therefore do not participate in the Hierarchy of the OMOP Standardized Vocabularies.